Author Topic: No spark. Please help  (Read 5994 times)

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Offline Drivehard

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Re: No spark. Please help
« Reply #15 on: December 31 2014, 02:05:57 AM »
Sorry I messed up when typing that.  I did not mean 5 I ment 4.    Thank you guys for the help.  I seriously think this is the must frustrating thing I have ever done. 
Let's try this again..... Deleted pin are
D2 low speed fan
B8 a/c
D11 steering
A2 ac
A8 data
A9 diagnostic
A7 trans
C8 trans
C7 trans
B10 park netural ????? Still there (ground this or no)
A10 speed sensor
C9 cruise
A3 canister
A4 EGR
D9 EGR
A5 engine light
A1 fuel pump

Anything look wrong? 

The module and coilpack are both new.

Offline Drivehard

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Re: No spark. Please help
« Reply #16 on: December 31 2014, 01:52:00 PM »
Sorry I messed up when typing that.  I did not mean 5 I ment 4.    Thank you guys for the help.  I seriously think this is the must frustrating thing I have ever done. 
Let's try this again..... Deleted pin are
D2 low speed fan
B8 a/c
D11 steering
A2 ac
A8 data
A9 diagnostic
A7 trans
C8 trans
C7 trans
B10 park netural ????? Still there (ground this or no)
A10 speed sensor
C9 cruise
A3 canister
A4 EGR
D9 EGR
A5 engine light
A1 fuel pump

Anything look wrong? 

Offline Drivehard

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Re: No spark. Please help
« Reply #17 on: January 07 2015, 10:06:10 PM »
Ok we are back from new years and I am back at it.  Went and got myself a noid light set today.  Checked 3 injectors andddd NOTHING!!  I have tested to make sure the module (below the coils) is getting power.  I ran a 10g wire from the block to one of the studs on the bottom of the module to make sure it is grounded.  I turn the ignition on and the check engine light comes on.  It has a brand new crank sensor.

Offline Steve Wood

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Re: No spark. Please help
« Reply #18 on: January 08 2015, 10:00:23 AM »
As I said before, that points to either the crank sensor (check that it is mounted in the correct slot and clearanced properly) or the module.  Some aftermarket modules will not work.  The Wells is the worst of the lot for not being any good if reputation means anything.

Also check the wiring between the crank sensor and the module.
Steve Wood

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Offline TexasT

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Re: No spark. Please help
« Reply #19 on: January 08 2015, 10:22:59 AM »
I turn the ignition on and the check engine light comes on.  It has a brand new crank sensor.

New doesn't equal working. Maybe a known good sensor. Anyone to pirate some stuff to see if yours works.
Rich

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Offline good2win22

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Re: No spark. Please help
« Reply #20 on: January 08 2015, 11:08:28 AM »
I may be wrong but doesn't A1 close the fuel pump relay when energized allowing power to go the injectors?
Jason

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Offline Steve Wood

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Re: No spark. Please help
« Reply #21 on: January 08 2015, 11:27:27 AM »
I may be wrong but doesn't A1 close the fuel pump relay when energized allowing power to go the injectors?

No-see the diagram.  Pretty sure the non turbo has the same routing

http://www.vortexbuicks-etc.com/fuel_pump.htm
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Offline good2win22

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Re: No spark. Please help
« Reply #22 on: January 08 2015, 12:40:23 PM »
yep I was wrong
Jason

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Offline motorhead

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Re: No spark. Please help
« Reply #23 on: January 08 2015, 01:04:11 PM »
As I said before, that points to either the crank sensor (check that it is mounted in the correct slot and clearanced properly) or the module.  Some aftermarket modules will not work.  The Wells is the worst of the lot for not being any good if reputation means anything.

Also check the wiring between the crank sensor and the module.
And scrape the paint off of the module bracket where it grounds to the engine and module, ensure that there is a good ground path all the way through.  I remember a number of guys powder coating the brackets and losing spark.  Check for resistance through the assembly to ensure it is within spec.

I've added dielectric grease and additional grounds here as well - still on my original module.
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Offline Drivehard

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Re: No spark. Please help
« Reply #24 on: January 09 2015, 11:56:17 AM »
Well I got the gm wiring schematic book that was supplied to the dealers in 1987. Turns out everything is exactly the same.... Except the cam sensor. These motors have a small cam sensor that goes in the front of the block just above the crank sensor.
I changed the wiring to match and I now have spark and injector pulse. 
Thank you guys for all your help. 

 

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