New and tested starter will spin but not engage

New and tested starter will spin but not engage

Postby mocke82 [OP] » September 6th 2014, 10:23pm

Hello everyone.

I have a 97 GMC Safari which I just replaced the starter in. The start will spin but not engage. I took it out and had it tested. It passed so I reinstalled it. Still had the same problem so I pulled it out and had it tested in a different place. It still passed but I'm still having the same problem. I tested the wires with a muiltimeter and they are all putting out the right voltage. Does anyone have any other ideas? Thanks!
Original Poster [OP]
mocke82
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: mocke82 has been a member for 6 full yearsmocke82 has been a member for 6 full yearsmocke82 has been a member for 6 full yearsmocke82 has been a member for 6 full yearsmocke82 has been a member for 6 full yearsmocke82 has been a member for 6 full years
Posts: 1
Topics: 1
Joined: August 2014
Gender: Male
Alias (AKA): mocker8
Van Model Year: 1997
Van Make/Model: GMC Safari

  • Similar topics
    Replies
    Views
    Author
  • 4.3 Starter Bolts
    by Slime » November 6th 2020, 6:31pm in Engines
    8 Replies
    210 Views
    Last post by AstroWill View the latest post
    December 1st 2020, 1:43am
  • chirping noise but only at highway speeds
    by gordo999 » September 1st 2020, 2:15am in Engines
    30 Replies
    921 Views
    Last post by gordo999 View the latest post
    September 19th 2020, 3:46am
  •  
    10
    82
    Last post by AstroSafari.com View the latest post
    February 25th 2021, 8:07pm

Re: New and tested starter will spin but not engage

Postby The Drummer » September 7th 2014, 10:36am

The only thing that comes to mind is a defective bendix that just wont come out as it should ,or something obstructing /keeping it from coming out and engaging .
''USE THE TORQUE LUKE ''




and beware of trees ,them nasty wooden things are evil .
User avatar
The Drummer
Firing on 3 Cylinders (L2)
Firing on 3 Cylinders (L2)
Years of Membership: The Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full yearsThe Drummer has been a member for 9 full years
Posts: 1327
Topics: 16
Images: 42
Joined: September 2011
Location: somewhere
Gender: Male
Alias (AKA):
Van Model Year: 2000
Van Make/Model: GMC Safari
Extra Info: SLT 4.3 AWD

Re: New and tested starter will spin but not engage

Postby chevy57bert » September 7th 2014, 10:47am

Yub. Bendix.. Or!!! Sometimes the flywheels have no theet because the bendix always hit the same place. But then you would hear the sound off scarping theet..
User avatar
chevy57bert
Section Moderator
Section Moderator
Firing on 7 Cylinders (L3)
Firing on 7 Cylinders (L3)
Years of Membership: chevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full yearschevy57bert has been a member for 11 full years
Posts: 2799
Topics: 69
Images: 68
Joined: July 2009
Location: Enschede The Netherlands
Gender: Male
Alias (AKA): Bertjuh
Van Model Year: 1992
Van Make/Model: Chevrolet Astro
Extra Info: Ext 4.3L rwd

Re: New and tested starter will spin but not engage

Postby RECox286 » September 7th 2014, 3:03pm

OK, that can be clarified by dismounting the starter, and looking at the theet on the ring gear.

Do you hear anything other than the starter wizzing, like when it's bench tested ?

Any scraping, or metal to metal sound ? Have you missed something, like a shim ?

Try loosening the hold down bolts by 2 turns from snug, and give it one short

blast to see if the bendix engages...you'll be knowing right soon enough from the

sound. (don't ruin the starter or ring gear by holding the key to START too long.

One flap of a humming bird wing should do it.)

Good hunting

Uncle Bob
Start a fire for a man and he will be warm for a day.
Set a man on fire and he will be warm the rest of his life.

Sent using two Progresso soup cans and a string
User avatar
RECox286
U.S. Armed Forces
U.S. Armed Forces
Purple Status (L6)
Purple Status (L6)
Years of Membership: RECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full yearsRECox286 has been a member for 10 full years
Posts: 5008
Topics: 40
Images: 0
Joined: July 2010
Location: South Jersey
Gender: Male
Alias (AKA): Uncle Bob
Van Model Year: 1993
Van Make/Model: Chevrolet Astro
Extra Info: RWD V6 [325K mi]

Re: New and tested starter will spin but not engage

Postby Lumpy » September 8th 2014, 2:38pm

Test the solenoid (the "Bendix").

Remove starter from vehicle.

Disconnect the big gauge wire that connects the solenoid to the starter motor.

Connect -12v to the case.

Touch +12v to the small solenoid terminal. You should hear it click. On most starters you should see it pull the starter motor gear, near the nose end of the starter, as if it was engaging with the flywheel.

If all that reveals the solenoid is working, and since you know the starter motor is working from the LAP test, the only thing left is the small wire connection between your ignition key and the solenoid.

Image


Lump
User avatar
Lumpy
Deprived Privileges
Deprived Privileges
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: Lumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full years
Posts: 10996
Topics: 261
Joined: April 2010
Location: Phoenix AZ USA
Gender: Male
Alias (AKA):
Van Model Year: 1989
Van Make/Model: Chevrolet Astro
Extra Info: 11 in. lift Camo

Re: New and tested starter will spin but not engage

Postby paulo57509 » September 15th 2014, 11:55pm

If there's no missing teeth on the flywheel, the starter drive (aka Bendix) is bad. The one-way sprag inside the drive is most likely not one-way anymore. With the starter on the bench, reach in and try to turn the drive gear CW and then CCW. It should turn one way and not the other. Sometimes this defect is intermittent and can also be dependent on how fast/slow you manually turn the gear.

If the starter spins with the ignition key, it's not the solenoid. This is because the solenoid HAS to kick out for it to complete the circuit that makes the starter spin.
paulo57509
Firing on 7 Cylinders (L1)
Firing on 7 Cylinders (L1)
Years of Membership: paulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full yearspaulo57509 has been a member for 11 full years
Posts: 713
Topics: 24
Images: 1
Joined: October 2009
Location: Central Valley/Bay Area CA
Alias (AKA):
Van Model Year: 2003
Van Make/Model: GMC Safari
Extra Info: RWD

Re: New and tested starter will spin but not engage

Postby HSS » November 9th 2014, 9:57pm

Hello everyone,
I have two 05 awd Astros one is working the other does not crank.
I am currently having problems with my starter. my mechanic changed it 2 years ago. I know the electric signal is getting to the relay under the hood. when I crank it, I can see the voltage go up to 12 when I connect to the yellow wire (that comes from the neutral safety switch to the relay in the under hood fuse box. The relay is working as I switched it with my over working van's and it started. I have a red wire going from the relay to the starter. I checked for continuity and it is indeed going to the starter. it is hot. The starter also has a purple wire going to the solenoid. I was hoping that I can test for continuity in the hopes that is it the same purple wire going to the relay. I tested for continuity and I could not get it. it seems that the purple wire from the relay is grounded! when I test for continuity it shows it is grounded. I also tested it on my running van and it is also grounded.

Can someone explain to me why is the purple wire off the relay grounded? How can I figure out where is the other end of the purple wire leaving the solenoid so can test it without removing the starter?

The diagram below shows that the purple wire connects the relay to the starter.

Thanks a lot.
Attachments
2013-02-04_052358_99_chevy_astro_starting_circuit.png
HSS
Fueling (1/8 tank)
Fueling (1/8 tank)
Years of Membership: HSS has been a member for 7 full yearsHSS has been a member for 7 full yearsHSS has been a member for 7 full yearsHSS has been a member for 7 full yearsHSS has been a member for 7 full yearsHSS has been a member for 7 full yearsHSS has been a member for 7 full years
Posts: 15
Joined: November 2013
Alias (AKA):
Van Model Year: 2005
Van Make/Model: Chevrolet Astro
Extra Info: awd

Re: New and tested starter will spin but not engage

Postby Lumpy » November 13th 2014, 1:30am

HSS wrote:
...Can someone explain to me why is the purple wire off the relay grounded? ...



The purple wire shows GROUND when not activated with +12vdc because the only path it has is to GROUND through the HOLD IN COIL. That coil has a tiny bit of resistance and a tiny bit of inductance but otherwise is a path to ground, straight (coiled) wire.

When activated (START) the voltage potential is + on the "top" side of the coil (top in your diagram). In that state, current flows through the coil toward ground. When not in the START condition, you apply your meter and current does exactly the same thing, it flows through the coil toward ground.

Very, very common and sometimes confusing situation in car electronics. Light bulbs can do the same thing. When not powered with (+) voltage, a light bulb filament is (usually) a path to ground when tested with a meter.


Lump
User avatar
Lumpy
Deprived Privileges
Deprived Privileges
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: Lumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full yearsLumpy has been a member for 10 full years
Posts: 10996
Topics: 261
Joined: April 2010
Location: Phoenix AZ USA
Gender: Male
Alias (AKA):
Van Model Year: 1989
Van Make/Model: Chevrolet Astro
Extra Info: 11 in. lift Camo


 
  • Related topics
    Replies
    Views
    Last post

Return to Engines

It is currently February 25th 2021, 8:07pm

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:
Ken2.7
in Engines
Views: 178
Comments: 10
Date: Yesterday
Time: 2:02am
» Read last comment
Attached by:
Attached by: Mmusicman
Mmusicman
in Engines
Views: 178
Comments: 10
Date: Feb 23 '21
Time: 8:38pm
» Read last comment
Attached by:
Attached by: Mmusicman
Mmusicman
in Engines
Views: 178
Comments: 10
Date: Feb 23 '21
Time: 8:41pm
» Read last comment
Attached by:
Attached by: WinnieVan
WinnieVan
in Engines
Views: 178
Comments: 10
Date: Feb 23 '21
Time: 8:07am
» Read last comment
Attached by:
Ken2.7
in Engines
Views: 178
Comments: 10
Date: Feb 22 '21
Time: 11:43pm
» Read last comment
Sponsors

Who is online

Users browsing this forum: No registered users and 9 guests