87 GL non-turbo no spark

[RMVR53]

actually, got spark but no fire. Belts are in time/have timing/spark checked with a timing light but it wont fire. Even sprayed carb cleaner into the throttle body but it wont light anything.

 

Ideas?

 

Bill

Edited October 16, 2010 by RMVR53

[AWD TURBO!]

how did you do your timing (with the cam timing marks!!) and is it TDC with the rotor pointing to #1?

[RMVR53]

timing/cam marks on the belt are on. Timing is set at 20BTDC

[RMVR53]

just pulled a plug and grounded it...VERY weak spark...almost yellow with a tint of blue...

 

coil?

 

 

Bill

[RMVR53]

lowest Ohm setting on my meter is 20 and primary reads between .9 and 1

secondary reads 10,500

 

thoughts?

Edited October 17, 2010 by RMVR53

[Cougar]

I doubt the problem is due to a weak spark. I suspect the real trouble may be due to valve timing. Have you checked the compression of the cylinders yet? If not, I suggest you do that to see if the valve timing is ok.

[RMVR53]

I figured I talk about a GL because thats where the dizzy/parts came from. This is actually my non-turbo XT that I'm converting to a 2 wire dizzy and single Mikuni PHH carb on a custom manifold. It runs for about 30 seconds on the 4 wire dizzy before the timing starts jumping all over the place (watching with a timing light AND watching the tach). So I know the engine runs...quite well...for that 30 seconds. When I installed the 2 wire dizzy, it won't hit/fire on anything flammable. The dizzy came out of a running car. With this in mind, I'm beginning to think that all my previous problems were coil related..even tho it was/is a new coil its got a problem

 

Bill

[Cougar]

If there is an ignitor in the circuit (pretty sure there is one) then you might try replacing it. They go out often.

[RMVR53]

are you talking about the transister on the small bracket next to the coil?

[Cougar]

Yes, that's it.