All of the sudden my 1994 960 started running on 5 cylinders. With my very limited knowledge of mechanics I started pulling the coils out one by one until I determined that #5 cylinder was not firing. I switched coils and plugs to see if that would help but no luck. I pulled the coil and plug out and cranked the engine and found there is no spark coming from the plug. I then used a test light and determined that there is power on both wires that come to the coil. So now I am stumped. If I have power to the coil then why no spark? Any help would be greatly appreciated.
Thanks!
Bob

maybe in some way there is no ground??

maybe in some way there is no ground??

The coil packs use the bolt holes as a ground connection I believe. They won't work unless you provide a ground.
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'96 965 with 16' wheels at 119K. Had '85 745 Turbo Diesel for 200K.

I agree with porkface, the Power Stage in located at the bottom, back of the lower intake manifold ball (for cylinders #4,5 & 6). If you want, you can swap it out with the one in the front of the lower intake manifold ball (for cylinders #1,2 & 3) and see it #2 starts misfiring instead of #5. That will confirm it's one of the two Power Stages.

DEWFPO
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1998 S90 070,050 and 1995 964 153,010

1 of the ignition modules has died. i think it's the 1 on the back of the intake that does 4,5 and 6. you can see it from underneath the car.

in the future, use a digital volt meter to look for power. a test light has too much continuity to ground and ecms don't like that. a meter will have a least 10 mega ohms of resistance. plus, a meter will tell you exactly how much voltage is there. 9v and 13v don't look that different with a light. good luck, chuck.

Chuck,
That did the trick. The module that controls 1,3, & 5 was bad. I swapped them out just to check and had no spark in #2 instead of #5. Got a new module and it runs like new!
Thanks again,
Bob