Really Wierd Problem, car not firing 2/3 coils.

empera

empera

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ok after a LONG time of having the car down after lifting out the engine and changing the timing belt, crank seal, exhaust manifold and tapping the oil pan, i ran some tests to see why the car will not start and have concluded that there is no spark in coils 1-6 and 2-5. I have swapped out the igniter, the cps and the coilpacks with known working ones.
After swapping everything and then seeing that there was still no spark in 2/3 coils, i checked to see if there was 12v/power coming from the coil pack wiring harness. I grounded the test light and tested each of the 3 plugs, there was power. I then connected the test light to the plugs ground and power and then spun the cps to see if there was any spark/signal. Again found that 3-4 had spark and the others didn't. This shows that there is no grounding happening on coils 1-6 and 2-5 when the cps spins but it does ground in 3-4.

What the hell could cause this? PLEASE HELP!!
 
empera

empera

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Mr. Y;890538 said:
So are you sure ECU receives signal from all three coils inside CPS?

PS: wiring may be broken inside connector... or even inside CPS. It's not always visible...
Click to expand...

CPS was swapped with known working one.

IwantMKIII;890542 said:
i would go with bad harness wiring or ecu error, more than likely wiring IMO
Click to expand...

My last harness was fine until i did the work on the engine that listed but i didnt touch anything electrical. Then i thought it was the harness and i swapped it. Still the same thing.


I think i might hafta to rewire it myself.
 
IwantMKIII

IwantMKIII

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empera;890573 said:
CPS was swapped with known working one.



My last harness was fine until i did the work on the engine that listed but i didnt touch anything electrical. Then i thought it was the harness and i swapped it. Still the same thing.


I think i might hafta to rewire it myself.
Click to expand...


theres only so many things this can be, you said you swapped basically the entire ingnition system which only leaves wiring. you say you swapped harness well i would suspect a wire terminal loose somewhere not giving the proper signal else where. odds of having two bad wiring harness's with the same problem are next to nothing but there's nowhere else to look besides grounding
 
empera

empera

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i might hafta just rewire the whole thing, im going to check continuity between everything first. But it may not be today because of this damn weather...
 
Quin

Quin

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Have you tried swapping ECUs? Maybe your ECU randomly crapped out. Check your plugs, make sure there are no pins missing.
 
empera

empera

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yep i will hafta wait till this weekend tho, it was way too cold yesterday, even in the garage, to work work on the car. I will def. keep you guys updated.
 
empera

empera

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Ok i checked for continuity between igniter and ecu today, all 4 wires were good, i then checked the continuity between the cps and ecu and all 4 were good.
The strange thing is that I made a mistake and confused 1 wire for another and ended up grounding the blue w/blk stripe wire on the igniter side and check and then i got the other coils working but not the other one, that was working before.

I am really stumped on this, I am thinking about just making my own damn engine harness.
 
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