codes p0200 p0174 p0300 2001 Astro...

codes p0200 p0174 p0300 2001 Astro...

Postby Travis [OP] » June 20th 2010, 12:01am

Hello,
Great forum with much info and dedicated astro/safari owners.
I love these vans. Engines run forever

After much reading, am hoping to get some guidance.
My 2001 Astro RWD van (dual gasoline and natural gas) on really hot days, sometimes won't start on the first try.
When it does start, the idle is sometimes a little rough. Most of the time it does start right away and never stalls out.
Engine light is on.
Following codes were retrieved,
p0200 p0300 p0174

The freeze frame info,
Fuel sys 1 CL
Fuel sys 2 CL
CALC LOAD % 3.92
ECT *C 74
STFT B1% 4.69
LTFT B2% 5.47
STFT B2% 48.44
LTFT B2% 25.00
MAP (kpa) 57.00
ENG RPT1 542
MAF g/s 6.89

Fuel pump, cap, rotor, plugs and wire set replaced

Your thoughts/opinions would be very much appreciated.
Thank you
Last edited by Travis on June 20th 2010, 5:12am, edited 1 time in total.
Original Poster [OP]
Travis
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: Travis has been a member for 3 full yearsTravis has been a member for 3 full yearsTravis has been a member for 3 full years
Posts: 7
Topics: 1
Joined: June 2010
Van Make/Model: Chevrolet Astro
Extra Info: LT 4.3L V6 RWD

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Re: codes p0200 p0174 p0300 2001 Astro...

Postby chevy57bert » June 20th 2010, 12:19am

Welcome to AS Travis.
Seems you have a fuel problem or/and a misfire.
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Re: codes p0200 p0174 p0300 2001 Astro...

Postby Astroplane » June 20th 2010, 8:08am

Running lean on Bank 2. Check fuel pressure. Did you replace the filter when you replaced the pump? Was the FF data taken before or after the repair?
The price of paying attention is cheap considering the alternative.
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Re: codes p0200 p0174 p0300 2001 Astro...

Postby Travis [OP] » June 20th 2010, 8:48pm

Fuel filter changed. FF data taken months after parts replaced.
I replace tuneup parts on a regular basis.
I pulled the dog house, inspected distributor and related parts. Checked as many connections as I could get at. No arching sparks. All looks perfect. Distributor vent screens aren't clogged.
One thing I did notice was that the A/C line was resting on TOP of the primary coil connector, crimping the wires.
After repositioning, I started the motor and engine light went out. Cleared the codes and went on a test drive with scanner connected. Motor ran flawlessly and no new codes. I will watch it and see what happens. Will attach a fuel pressure gauge to observe if I encounter another no start. There seems to be a pattern of trouble when switching to natural gas.
Original Poster [OP]
Travis
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: Travis has been a member for 3 full yearsTravis has been a member for 3 full yearsTravis has been a member for 3 full years
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Extra Info: LT 4.3L V6 RWD

Re: codes p0200 p0174 p0300 2001 Astro...

Postby chevy57bert » June 20th 2010, 9:41pm

Just curious, do you have a `superfix` installed on your Van ??
Do you only get in trouble if your running on petrol?
Will your Van run perfect on LPG ?

superfix fools your lambada, when running on LPG.
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Re: codes p0200 p0174 p0300 2001 Astro...

Postby Travis [OP] » June 21st 2010, 10:33pm

Drove the van today with scanner connected.
Ran fine but shortly after turning out of the driveway, it registered a p0420 code in gasoline mode.
While in gasoline mode and driving, the motor cut out abruptly and suddenly. After a couple of seconds and coasting, the motor got power and all was fine for the rest of the day.
On three separate and random occasions, I switched to natural gas (LNG) via the dash switch and a code p0200 was generated immediately. Truck still runs well.
I am now suspecting icm and/or ho2 sensor?
Have to get hold a fuel pressure gauge to absolutely rule out fuel pump but, since I did get a p0300 code which suggests distributor/ignition, I'm not really suspecting the fuel pump.
Upon inspection of exhaust and cat converter, all appear to be in very good condition. That is, no discoloration, no loss of power, no unusual smells or leaks.

What do you think?

P.S As a side, I'm reasonably certain that I have dexcool in my rad. However, while testing with a voltmeter, the reading was .4 volts (under.5 is good). The coolant seems to be in good shape. Am noticing mild corrosion uinder rad cap. Time to flush and fill.
Original Poster [OP]
Travis
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: Travis has been a member for 3 full yearsTravis has been a member for 3 full yearsTravis has been a member for 3 full years
Posts: 7
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Joined: June 2010
Van Make/Model: Chevrolet Astro
Extra Info: LT 4.3L V6 RWD

Re: codes p0200 p0174 p0300 2001 Astro...

Postby Travis [OP] » June 23rd 2010, 5:23pm

Found one problem.
Alternate fuel GM injector interceptor that was installed is the wrong part according to part number lookup.
A 4112 (OBD-1) was installed when, according to my research a 41132 Interceptor 2 (OBD-2) should have been installed.
Seems that this problem is going to be with the LNG add on part giving false code and conflicting with computer.

Please feel free to chime in... :)
Original Poster [OP]
Travis
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: Travis has been a member for 3 full yearsTravis has been a member for 3 full yearsTravis has been a member for 3 full years
Posts: 7
Topics: 1
Joined: June 2010
Van Make/Model: Chevrolet Astro
Extra Info: LT 4.3L V6 RWD

Re: codes p0200 p0174 p0300 2001 Astro...

Postby Travis [OP] » June 24th 2010, 2:23am

Problem solved.
Replaced faulty, outdated and poorly constructed Alternate fuel GM injector interceptor (natural gas add on).
All is right again, except, now my radio won't turn off when the door is opened.
Oh well, have some wiring issues to sort.
Original Poster [OP]
Travis
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: Travis has been a member for 3 full yearsTravis has been a member for 3 full yearsTravis has been a member for 3 full years
Posts: 7
Topics: 1
Joined: June 2010
Van Make/Model: Chevrolet Astro
Extra Info: LT 4.3L V6 RWD

Re: codes p0200 p0174 p0300 2001 Astro...

Postby finnyfinn » February 12th 2011, 10:09am

Travis wrote:Problem solved.
Replaced faulty, outdated and poorly constructed Alternate fuel GM injector interceptor (natural gas add on).
All is right again, except, now my radio won't turn off when the door is opened.
Oh well, have some wiring issues to sort.



What is an injector interceptor????? I'm having the same prob you were having and it's driving me nuts. I just spent $700 and it's still not fixed.
finnyfinn
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Re: codes p0200 p0174 p0300 2001 Astro...

Postby Travis [OP] » February 18th 2011, 1:52am

The injector interceptor/Timing advance processor is the red box (a natural gas aftermarket part), usually mounted on the firewall if you have a natural gas conversion with six wires and a plastic connector protected by a rubber boot.
It is responsible for advancing the timing. These fail. When they do, the truck will not start. But, there should be a plastic bypass connector/adapter, to be able to bypass the box to determine if it is indeed the box.
Original Poster [OP]
Travis
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: Travis has been a member for 3 full yearsTravis has been a member for 3 full yearsTravis has been a member for 3 full years
Posts: 7
Topics: 1
Joined: June 2010
Van Make/Model: Chevrolet Astro
Extra Info: LT 4.3L V6 RWD


 
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