Messages

1

General Buick Tech / Re: No spark. Please help

« 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. 

2

General Buick Tech / Re: No spark. Please help

« 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.

3

General Buick Tech / Re: No spark. Please help

« 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? 

4

General Buick Tech / Re: No spark. Please help

« 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.

5

General Buick Tech / Re: No spark. Please help

« on: December 30 2014, 12:03:50 PM »

Yes. I left a wire for that sort of test.  This may sound dumb but I go to positive with on side and to pin 5 with the other correct? I don't have the actual ALDL

6

General Buick Tech / Re: No spark. Please help

« on: December 30 2014, 10:22:18 AM »

I sent him a pm.   Thank you. 

7

General Buick Tech / Re: No spark. Please help

« on: December 30 2014, 02:40:20 AM »

I will. Thank you

8

General Buick Tech / Re: No spark. Please help

« on: December 29 2014, 10:24:18 PM »

Grounds redone, one to the block one to the frame. 
Pins I deleted when installing
A1, A5, A7, A8, A9, A10
B8, B10 (not sure if it needs to be grounded so it's still long enough)
C7, C8
D2 ,D3, D5, D9

Maybe I screwed up doing something there?

9

General Buick Tech / Re: No spark. Please help

« on: December 29 2014, 10:25:00 AM »

I was starting to wonder that. There is a ground strap to the frame.  The frame of corse is steel and the motor mounts as well as transmission mounts are solid metal welded to the frame.  I am headed to napa this am to buy another ground to run to the block. 
When I went through the wiring last night I changed the grounds to go to the block and frame anyway. 

10

General Buick Tech / Re: No spark. Please help

« on: December 29 2014, 12:13:56 AM »

Looking at the wiring diagram there is a small sign on the top of the ignition control module that says C3I and a ground symbol. Does this mean the case should be grounded?  It is on the bracket on top of the head but not sure it would get ground there as that bracket is painted.

11

General Buick Tech / No spark. Please help

« on: December 29 2014, 12:09:07 AM »

I installed a 3.8 out of a 1987 Century in a sand rail I built for my kids for Christmas. I know they are not exactly the same as the gn but very close. 100% disclosure, I bought the motor clutch and adapter. He had lost the wiring harness and computer. (I know about the megasquirt and I can not afford that set up).  I bought a wiring harness from an 87 turbo car. Both pin outs are the same on the diagrams I got from all data pro.  Bought a reman 1227783 ecm (and an ebay used one with the prom)  The cam sensor is new Crank sensor is new  Ignition control module is new   I have no spark. At all   I have power and ground at the ignition module. Power and ground at cam and crank   I ran all the ignition switched wires to a fuse block that is turned on and off via a relay.   I ran all the grounds to the negitive side of the battery.   I can not for the life of me figure this out.  I just went through the entire wiring harness and can not find any problems with the wires or where they are ran.