ingition question

ingition question

Postby tnhillbilly [OP] » February 18th 2009, 3:49pm

I have a 1996 high top conversion van. I have been averaging 15-16 mpg and was wondering if that is normal. I do live in east Tn. and it is hilly. My question is when I am going up a hill and the engine starts lugging I feel a miss. It will do it constantly until it downshifts or picks up speed after the hill. When you are leveled out there is no miss at all. It don't miss at all if you use the cruise but it kicks down too often to suit me. It does have new plugs, wires, distributor cap and rotor. I don't remember what brand the cap and rotor are but I know it isn't genuine GM. The plugs are ap605 autolites and the wires are the duralast gold from autozone. It also has a new cat converter. I am sure it also has the original coil on it with 175000 miles. It has no cel light on and the scanner doesn't show anything. I don't know if the o2 sensors have been replaced or not but they show to be working fine. I just don't want to start spending money for nothing. I am not real familiar with these vans but I have read that caps and rotors seem to be a problem. If a misfire was the case wouldn't it throw a code? Any input appreciated. :feedback:
1996 Safari high top conversion rwd 175,000 miles original engine, tranny, and rear end.
Original Poster [OP]
tnhillbilly
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: tnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full years
Posts: 128
Topics: 22
Joined: January 2009
Alias (AKA):

Re: ingition question

Postby Matrixx » February 18th 2009, 6:55pm

Hi tnhillbilly

The ap605 plugs are correct and are platinum from autolite. I don't know what to say at this point THB. The times when this happened to me (miss under load) was always ignition related in some way.

This may or may not be your problem but would be the first place I would look personally. Regardless of where the miss is coming from, that coil really does need replacing with that many miles on it(especially with these vans). ACDelco or MSD would be my suggestion here.

I don't know much about the brands you bought THB, but from my own experiences over the last 12 years is that their really is a very narrow band of products these motors like to have running in them (ignition wise) and very broad band of the ones they don't. This isn't to say the brands you bought aren't any good, but just to let you know you really need to do your home work when it comes to those brands you bought meet the OEM specs. Many brands don't even come close and the main reason for premature ignition misses and failures.

As for gas mileage with a high top, I would say it's pretty close from what you mentioned. It's amazing how much extra drag those high tops create (especially on the highway). I hope something here will help. Please keep us updated, Thanks.:)
96-GMC Safari - Rwd - Original Transmission - Exhaust - Air Cared - 3.73 Limited Slip Rear End - Motor Replaced - 91 octane (Chevron) for the last 14 years - MFI Upgrade - 640,000 Kilometers.
User avatar
Matrixx
AstroSafari Pioneer
AstroSafari Pioneer
Firing on 6 Cylinders (L3)
Firing on 6 Cylinders (L3)
Years of Membership: Matrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full years
Posts: 2640
Topics: 14
Joined: January 2008
Alias (AKA):

Re: ingition question

Postby astro355 » February 18th 2009, 7:04pm

Yes, like Matrixx said, the coil should be replaced. When your putting a heavier load on the engine, the dynamic cylinder pressure increases putting more of a strain on the ignition system. At cruise, it may provide enough of a spark to make the engine run but at the same time be a direct result of the mileage.

What you can do to test it is get a spark tester and see how that turns out. You can't use a spark plug under atmospheric pressure because the cylinder generates 150 psi or more and the plug will fire differently in each environment.

Either way, the coil should be replaced.
Diagnose 1st, never be a parts changer!

355 small block chevy w/ modified 700R4

Image
User avatar
astro355
V8 Swap Achievement
V8 Swap Achievement
Firing on 4 Cylinders (L6)
Firing on 4 Cylinders (L6)
Years of Membership: astro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full years
Posts: 5484
Topics: 57
Joined: May 2008
Location: Cleveland, OH
Gender: Male
Alias (AKA):
Van Model Year: 1989
Van Make/Model: Chevrolet Astro
Extra Info: 355 V8 700R4

Re: ingition question

Postby tnhillbilly [OP] » February 19th 2009, 12:23am

I replaced the coil today with an ac-delco part. I just loved the factory pop rivet installation. :banghead: At least it was soft metal and not real bad to get apart. It is definitely an improvement. The van has more power and the miss is almost completely gone. My wife says it isn't missing anymore but I can still feel it. It is more of a slight stumble now. I think the cap and rotor are wells brand. Have any of you all had any dealings with this brand? I know from checking up on it that these vans like oem ignition parts best. I just wish I had done my homework earlier. I am going to be going on an 800 mile round trip in a couple of weeks to pick up my son-in-law from camp geiger mct where he is doing his infantry training and I don't really want to have any van trouble. If any of you can give me some feedback on how the wells brand works out on the vans it will be much appreciated. If you all think that they are the problem I will change them out. :ty:
1996 Safari high top conversion rwd 175,000 miles original engine, tranny, and rear end.
Original Poster [OP]
tnhillbilly
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: tnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full years
Posts: 128
Topics: 22
Joined: January 2009
Alias (AKA):

Re: ingition question

Postby davesyo » February 19th 2009, 1:59am

If this was my van I would not use wells ignition parts .I would and do use ac delco , although I do have standard ignition plug wires which I heard are pretty good and seem to work great so far.
davesyo
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: davesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full yearsdavesyo has been a member for 13 full years
Posts: 136
Topics: 2
Joined: February 2008
Alias (AKA):

Re: ingition question

Postby astro355 » February 19th 2009, 2:57am

You'll have to forgive my bluntness here but:

Wells=sucks

I have seen people use them, I have had customers put wells parts on their cars and they are just crap parts.
</end bluntness>
Diagnose 1st, never be a parts changer!

355 small block chevy w/ modified 700R4

Image
User avatar
astro355
V8 Swap Achievement
V8 Swap Achievement
Firing on 4 Cylinders (L6)
Firing on 4 Cylinders (L6)
Years of Membership: astro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full yearsastro355 has been a member for 12 full years
Posts: 5484
Topics: 57
Joined: May 2008
Location: Cleveland, OH
Gender: Male
Alias (AKA):
Van Model Year: 1989
Van Make/Model: Chevrolet Astro
Extra Info: 355 V8 700R4

Re: ingition question

Postby Gary » February 19th 2009, 4:35am

Yepper-AC Delco for a cap and rotor.You know,given a 800 mile trip,would hurt to put on a new fuel filter too.
User avatar
Gary
Dearly Departed
Firing on 4 Cylinders (L3)
Firing on 4 Cylinders (L3)
Years of Membership: Gary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full yearsGary has been a member for 12 full years
Posts: 2472
Topics: 136
Joined: April 2008
Location: Rochester,NY 14559
Gender: Male
Alias (AKA):
Van Make/Model: Chevrolet Astro
Extra Info: high top

Re: ingition question

Postby Matrixx » February 19th 2009, 9:42am

Well I think the verdict is in tnhillbilly. Another dog house removal I guess.:)
96-GMC Safari - Rwd - Original Transmission - Exhaust - Air Cared - 3.73 Limited Slip Rear End - Motor Replaced - 91 octane (Chevron) for the last 14 years - MFI Upgrade - 640,000 Kilometers.
User avatar
Matrixx
AstroSafari Pioneer
AstroSafari Pioneer
Firing on 6 Cylinders (L3)
Firing on 6 Cylinders (L3)
Years of Membership: Matrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full years
Posts: 2640
Topics: 14
Joined: January 2008
Alias (AKA):

Re: ingition question

Postby tnhillbilly [OP] » February 19th 2009, 1:15pm

Well a friend had given me the cap and I bought the rotor button so I am not out much. I am just glad I am finding out now. As far as the doghouse removal Matrixx, I don't mind it anymore. I have had it off so many times since I got this van I know what tools I need before I even start. I believe I could do it in my sleep. LOL. I bought this conversion van with a blown head gasket and some other problems for 300.00 and I have done a lot of work on it. I believe the previous owners just drove it and didn't do anything to it. They owned it for 5 years and it didn't appear it was ever even cleaned inside. My wife almost had a coronary when I brought it home. :screaming: After all the mechanical things have been fixed and the inside cleaned 3 or 4 times and seats installed ( found a matching set of 4 captains chairs and a rear seat at the local boneyard in the right color) it don't look like the same van I brought home. I think the only thing I haven't touched is the bottom end of the engine. I have less than 2500.00 in the van and at least I know what I have got and what has been done to it. When we were looking for a high top most of what we found were starting at 2000.00-2500.00 and all of them were going to need some work. It has taken me 4 months to get it going but I think it is ready for another 175000 miles now.
Oh yeah, What is the bleed down procedure on the fuel lines to replace the filter ( thanks Gary) . I am sure that hasn't been done either.
Thanks for all the input. By the way Astro355, I don't mind bluntness, sometimes truth hurts. :whack:
:ty:
1996 Safari high top conversion rwd 175,000 miles original engine, tranny, and rear end.
Original Poster [OP]
tnhillbilly
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: tnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full years
Posts: 128
Topics: 22
Joined: January 2009
Alias (AKA):

Re: ingition question

Postby tnhillbilly [OP] » February 26th 2009, 3:39am

Well, new fuel filter, AC Delco cap and rotor and no miss. Do still get a stumble sometimes right before downshift when it is lugging down. Is that normal? When I say lugging down, I mean the rpms are very low, just before coming out of overdrive to drive. Never skips a beat other than that. No more ignition parts other than OEM. :whack:

:ty: :ty:
1996 Safari high top conversion rwd 175,000 miles original engine, tranny, and rear end.
Original Poster [OP]
tnhillbilly
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: tnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full years
Posts: 128
Topics: 22
Joined: January 2009
Alias (AKA):

Re: ingition question

Postby Matrixx » February 26th 2009, 3:54am

Hi tnhillbilly

Thanks for the updates. I can remove my dog house in about 2 minutes or so when I'm set up for it. I don't know if that's good or bad, LOL. Yeh, in my sleep as well, hehe.

Hmm, lugging down in overdrive? 45 mph or 70 kph is when the overdrive should release when slowing down, does it release at the speed (or close to it)? Have you changed the transmission fluid yet?
96-GMC Safari - Rwd - Original Transmission - Exhaust - Air Cared - 3.73 Limited Slip Rear End - Motor Replaced - 91 octane (Chevron) for the last 14 years - MFI Upgrade - 640,000 Kilometers.
User avatar
Matrixx
AstroSafari Pioneer
AstroSafari Pioneer
Firing on 6 Cylinders (L3)
Firing on 6 Cylinders (L3)
Years of Membership: Matrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full years
Posts: 2640
Topics: 14
Joined: January 2008
Alias (AKA):

Re: ingition question

Postby tnhillbilly [OP] » February 26th 2009, 4:05am

Right around 40. But that is with a very light foot on the throttle. Fluid and filter both has been changed.
1996 Safari high top conversion rwd 175,000 miles original engine, tranny, and rear end.
Original Poster [OP]
tnhillbilly
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: tnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full yearstnhillbilly has been a member for 12 full years
Posts: 128
Topics: 22
Joined: January 2009
Alias (AKA):

Re: ingition question

Postby Matrixx » February 26th 2009, 4:35am

If it locks up and releases at that speed (or close to each other) then it should be fine. If it locks at a higher speed then releases at a lower speed then that "could" be sign of a worn TCC component somewhere. Either way, it doesn't sound serious at this point, but you might want to keep an eye on it if the lock, un-lock mph spreed is to wide. Just a heads up that's all.:)
96-GMC Safari - Rwd - Original Transmission - Exhaust - Air Cared - 3.73 Limited Slip Rear End - Motor Replaced - 91 octane (Chevron) for the last 14 years - MFI Upgrade - 640,000 Kilometers.
User avatar
Matrixx
AstroSafari Pioneer
AstroSafari Pioneer
Firing on 6 Cylinders (L3)
Firing on 6 Cylinders (L3)
Years of Membership: Matrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full yearsMatrixx has been a member for 13 full years
Posts: 2640
Topics: 14
Joined: January 2008
Alias (AKA):


 
  • Related topics
    Replies
    Views
    Last post

Return to Engines

It is currently April 14th 2021, 12:17am

Engines Forum
Engine Repairs, Modifications, Diagnostics, Tuning, Upgrading, Questions.

<a href="https://ad.doubleclick.net/ddm/trackclk/N8334.275400VERTICALSCOPEINC./B20209277.204028354;dc_trk_aid=407011718;dc_trk_cid=94070067;dc_lat=;dc_rdid=;tag_for_child_directed_treatment="target="_blank"><img src="https://tpc.googlesyndication.com/pagead/imgad?id=CICAgKDrrqWwMRCAARgcKAEyCN4sAjjtai4k" border="0" align="right">
<IMG SRC="https://ad.doubleclick.net/ddm/trackimp/N8334.275400VERTICALSCOPEINC./B20209277.204028354;dc_trk_aid=407011718;dc_trk_cid=94070067;ord=;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER="0" HEIGHT="1" WIDTH="1" ALT="Advertisement">
Moderator: chevy57bert
To create a new topic in Engines, click this button:
Previous topic Next topic
Recent Image Attachments
Attached by:
kvargas1356
in Engines
Views: 74
Comments: 1
Date: Apr 11 '21
Time: 10:20pm
» Read last comment
Attached by:
Attached by: jfunkngroove
jfunkngroove
in Engines
Views: 231
Comments: 17
Date: Apr 10 '21
Time: 10:38pm
» Read last comment
Attached by:
Attached by: Mmusicman
Mmusicman
in Engines
Views: 79
Comments: 3
Date: Apr 08 '21
Time: 8:52pm
» Read last comment
Attached by:
Attached by: jfunkngroove
jfunkngroove
in Engines
Views: 231
Comments: 17
Date: Apr 08 '21
Time: 1:55am
» Read last comment
Attached by:
Attached by: Mmusicman
Mmusicman
in Engines
Views: 275
Comments: 7
Date: Mar 22 '21
Time: 2:11pm
» Read last comment
Sponsors

Who is online

Users browsing this forum: No registered users and 27 guests