coil pack?

studmuffin · 08-17-2003, 09:29 PM

I have a 1985 buick gn motor in my 1983 t-type. I got the harness out of the 1985 and the motor which I rebuilt from top to bottom. I have been trying to get it running and it seems to be a never ending battle. I am getting spark and injector pulses. I put in a new cam sensor and crank sensor. I noticed recently that the coil pack looks like it is the 1986-87 model. The numbers are
642 back
351 front
I don't have any adapter on it but the 1985 harness plugs right in to the coil pack. I know that the cam sensors are for 1984-1987 but is the crank sensor the same way? I guess my question is could it be the coil pack, do I need a adapter or a new coil? If anyone has any ideas I would appreciate it and thank you in advance......... uzi

Orlando_87GN · 08-17-2003, 10:29 PM

You will need the adapter from Caspers or an '85 coil pack.

86gnoddfire · 08-17-2003, 10:42 PM

i have a 85 coil pack and it does not plug into my 86 wiring harness.i was having coil troubles and tryed an 85.the multi pin plug has different aligning lugs built in to the plastic.

studmuffin · 08-17-2003, 10:53 PM

Okay, well my problem is that I know this harness came out of a 1985 and it does plug into the adaptor with no problem and the coil is for a 86-87 model. I did get a spare coil with the car I bought which I think is the 1985 model but it does not fit, it is smaller and the holes don't line up. Any suggestions?
Thanks

08-17-2003, 09:29 PM	#1 (permalink)
studmuffin Lurker Join Date: Jul 2003 Location: rochester, ny Posts: 28	coil pack? I have a 1985 buick gn motor in my 1983 t-type. I got the harness out of the 1985 and the motor which I rebuilt from top to bottom. I have been trying to get it running and it seems to be a never ending battle. I am getting spark and injector pulses. I put in a new cam sensor and crank sensor. I noticed recently that the coil pack looks like it is the 1986-87 model. The numbers are 642 back 351 front I don't have any adapter on it but the 1985 harness plugs right in to the coil pack. I know that the cam sensors are for 1984-1987 but is the crank sensor the same way? I guess my question is could it be the coil pack, do I need a adapter or a new coil? If anyone has any ideas I would appreciate it and thank you in advance......... uzi __________________ 1985 buick gn engine, aftermarket rods,crank and pistons. K&n 9" filter, manley valves and minor port job, accufab fuel regulator, gn110t cam kit, hotwired fuel pump. Kenne bell 17 pound chip, atr downpipe and no converter, no heat or power steering, electric fan and tranny cooler, stock turbo and injectors for now.....Frank

08-17-2003, 10:29 PM	#2 (permalink)
Orlando_87GN Resident Idiot Join Date: Sep 2000 Location: Orlando, FL USA Posts: 10,372	You will need the adapter from Caspers or an '85 coil pack. __________________ Check Out MikesStuff4Sale.com to view my used parts! ------------------------------------------------ 1987 Buick Grand National Budget 4.1, 204/214 cam, TA-49 Turbo, Stockish Heads, V4, MSD50's, TH DP, JayJackson 62mm TB, Translator plus Extender powered. 3680# with pilot ------------------------------------------------ 1993 Mazda RX-7 4.1 Buick Powered 11.20 @ 128mph (2.4 60')!

08-17-2003, 10:53 PM	#4 (permalink)
studmuffin Lurker Join Date: Jul 2003 Location: rochester, ny Posts: 28	Okay, well my problem is that I know this harness came out of a 1985 and it does plug into the adaptor with no problem and the coil is for a 86-87 model. I did get a spare coil with the car I bought which I think is the 1985 model but it does not fit, it is smaller and the holes don't line up. Any suggestions? Thanks __________________ 1985 buick gn engine, aftermarket rods,crank and pistons. K&n 9" filter, manley valves and minor port job, accufab fuel regulator, gn110t cam kit, hotwired fuel pump. Kenne bell 17 pound chip, atr downpipe and no converter, no heat or power steering, electric fan and tranny cooler, stock turbo and injectors for now.....Frank

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08-17-2003, 10:42 PM	#3 (permalink)
86gnoddfire Junior Member Join Date: Mar 2002 Posts: 95	i have a 85 coil pack and it does not plug into my 86 wiring harness.i was having coil troubles and tryed an 85.the multi pin plug has different aligning lugs built in to the plastic.