coilpack madness

Post by **F3600** » Tue May 03, 2005 8:23 am

Hi, I finally found the culprit on my engine .. i Just want some input..

Car is absolutely undriveable misfire /backfire/ backire in the intake /fuel cut /bad idle , hard to start

Well when i unplug my number 3 coilpack the car is okay ... its fully driveable i boosted a 0.5 bar with no real problem .. car seemed fine...

Soo i park in my driveway .. and unbolt the coilpack from the head... car was misfiring and playing with the trhottle was needed to keep it running ..

Now that the coilpack was in my hand and not on the sparkplug i unplug it and bam : the car start running good again... im like WTf , so i plug the coil while holding it in my hand .. and the car start misfiring and running like **** .. i tried with 3-4 other coilpack .. no change .. everytime i pluggued thed coil the car was running bad

Anyway now im pretty sure my wiring is ****up somwhere in my Ignitor/coilpack/ecu wiring .. is it right?

ho well I think im gonna take out my harness and examine that.

anyone ever got a problem like that ?

Post by **boost_boy** » Tue May 03, 2005 8:29 am

F3600 wrote:Hi, I finally found the culprit on my engine .. i Just want some input..

Car is absolutely undriveable misfire /backfire/ backire in the intake /fuel cut /bad idle , hard to start

Well when i unplug my number 3 coilpack the car is okay ... its fully driveable i boosted a 0.5 bar with no real problem .. car seemed fine...

Soo i park in my driveway .. and unbolt the coilpack from the head... car was misfiring and playing with the trhottle was needed to keep it running ..

Now that the coilpack was in my hand and not on the sparkplug i unplug it and bam : the car start running good again... im like WTf , so i plug the coil while holding it in my hand .. and the car start misfiring and running like **** .. i tried with 3-4 other coilpack .. no change .. everytime i pluggued thed coil the car was running bad

Anyway now im pretty sure my wiring is ****up somwhere in my Ignitor/coilpack/ecu wiring .. is it right?

ho well I think im gonna take out my harness and examine that.

anyone ever got a problem like that ?

Suspect the igniter first. If that doesn't solve it, check the codes on your ecu to see if your crank angle sensor isn't playing-up on you. Definitely check the grounding of the engine to include block and intake manifold. Don't rule out the ecu as possible culprit. And lastly, make sure the compression is good on that cylinder.

Dee

Post by **F3600** » Tue May 03, 2005 8:35 am

I bought an ignitor should be here tomorow so im gonna test that out

Ecu is 55 Grounding seem fine .. I have 3-4 just on the engine alone with some big gauge cable andcompression is 160 all around.

thinking of that i only grounded my head and my intake manifold, is it alright or i must ground the block too ? if so, im gonna do that now

thx for you help boostboy

Post by **boost_boy** » Tue May 03, 2005 9:13 am

Definitely ground the block. Hopefully the new igniter clears up your issues, but if not I have a few more things that could be the problem. And you're more than welcome .

Dee

Post by **NeedCAforS13** » Tue May 03, 2005 9:19 am

dee, where is the block ground. Just out of curiosity... I can't remember where I hooked it up

Sean

Post by **boost_boy** » Tue May 03, 2005 9:24 am

NeedCAforS13 wrote:dee, where is the block ground. Just out of curiosity... I can't remember where I hooked it up

Sean

You can ground it by connecting a ground strap to any threaded inserrt on the block, preferably below the turbo.

Dee

Post by **c-rad** » Tue May 03, 2005 10:25 am

When I do my install, I am going to home depot and getting a couple feet of 8 gauge wire and doing all my grounds.

Post by **F3600** » Tue May 03, 2005 10:44 am

I installed a new ground and the problem still there...

I have a simple question, When the car is running are the two led behind the Ecu are supposed to be lit?

Post by **boost_boy** » Tue May 03, 2005 11:10 am

F3600 wrote:I installed a new ground and the problem still there...

I have a simple question, When the car is running are the two led behind the Ecu are supposed to be lit?

Man, you hit me with a nasty question, but I think they are suppose to be on. If you say you're backfiring and everything, you're either losing ignition through your rpm range or your injector is cutting out under load and then back on again. I still will be wary of the ecu as well. Your problem lies between your complete ignition system to include the ecu, but not the AFM. CAS, igniter, injectors, ecu, and or injector drivers. Or check the harness to make sure no ground wires are cut.

Dee

Post by **F3600** » Tue May 03, 2005 11:30 am

The *trouble* occurs only when i plug the coilpack 3 , otherwise the car run fines.. maybe there a short somewhere in the harness .. ill look trought that after i test my new ignitor

this car is getting me Crazy but , with everything i tried to solve the problem, ive learned a lot since my swap last april ... I like that but... driving it would be more Fun.. ...

Post by **pulsar gtr** » Tue May 03, 2005 12:44 pm

HI Fred man,

Sounds that the Red rubber boot on th coil isn't doing its job and the spark instead of being transfered to the plug itself, it is actually jumping to the head which is shorting it out to ground.

get another coil or just the rubber red boot and replace it or get some electric tape and rap it around the red rubber boot.

I have seen it few times doing that and if that is the case which I believe so, after a while the ignitor get fried. Before you plug another ignitor make sure the red rubber boot is well isolated from the surrounding areas when installed.

Good luck

RafiPULSAR GTR

Post by **F3600** » Wed May 04, 2005 3:56 am

i tried that and didnt change anything .. ill need to check every wire of the ignition signal im pretty sure .. ill just wait to test a new ignitor and if there no change .. i take out my harness

Post by **CA19DET** » Wed May 04, 2005 5:00 am

check the wires in the coil harness for craks etc..

Post by **F3600** » Wed May 04, 2005 7:27 am

Yep .. well i think i got it.. i was ohming the harness from the 4 pin connector from the ignitorto the the 5 pin connector for the coilpack subharnes One of the pin on the ignitor harness was ohming with 3 wire on the coilpack subharness ! there 4 signal wire supposed to be isolated and a 12 V blue /red stripe. Im taking out the harness to unwrap this part of the harness and repair the wires .. !Im so happy !!!

Modified by F3600 at 6:41 PM 5/4/2005

Post by **F3600** » Wed May 04, 2005 10:18 am

running Fine now.. !!!Yeah... that was a the modification to the harness to run the SOHC tach .. 2 diode were touching each other causing the signal to jump between wire. I opened almost all the harnes to find it was 3 " after the ignotor plug

Thx for your help everyone

coilpack madness

coilpack madness

Re: coilpack madness (F3600)

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Re: (NeedCAforS13)

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