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Rb26Dett / Something Wrong With Idle/fire

drpheel

By drpheel,
in Engines & Forced Induction

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drpheel Enthusiast

drpheel

Posted
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Hey guys !! Just started my car this weekend after my friday night cruise and the car was Ideling funny. I could actualy hear a small POP sound returning in the plenum. After a few troubleshoot steps I noticed that when I pulled the 6th coil plug or injector plug the car was still ideling the same and still did the pop. all other coils or injector that I disconnect has a direct impact on idle. I have changed all the coil packs one by one, Cleaned my mafs, Checked the plugs and re-gapped them, Changed the Ignitor. I dont thinks its the fuel as the car was running great friday night. When my coil pack change did not work I did a compression test and found all 6 CLY to be 150-155 6th cyl was the best @ 155.

Im kind of out of Ideas here :( Is there a way I can remove the coil of #6 and look if there is actualy a spark ?! All readings in POWER FC look great and I have no TPS probleme it sees IDLE ON and goes off as soon as I play with the throttle a bit. I wish I had a video to show you guys the sound :S

Any help or pointers would be great !!

thanks

drpheel Enthusiast

drpheel

Posted
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They all have a nice brown beige color to them, tho the ceramic on #6 was a bit more black. I have changed them and re-gapped them. Im at the office right now so no acces to pics : (

drpheel Enthusiast

drpheel

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Posted (edited)
Do you have stock coil packs? If the spark plugs don't fix it, then I'm sorry to say but you'll have to get a known working set and swap it in.
I tryed stock 26 coil packs working , stock 20 and 25 and I still get the probleme :(

***edit : I have also tryed different wire looms from the Ignitor to the coil packs with different coil packs and still same result

Edited by drpheel
Cowboy1600 Grand Master

Cowboy1600

Posted
Posted

Pull the plug, plug it into the coil pack, sit it on top of the motor with about 1-2mm between the end of the plug and one of the rocker covers, get a mate to start the car for you (turn your turbo timer off first) and see if there's a spark at the plug. You only need the car runnign for 2-3 seconds (no damage will be done when doing this). Perhaps even pull two and compare them. #6 might be sparking but be very weak.

If you have lots of delicious spark, I'd be looking for a fuel problems such as a leaky or blocked injector.

drpheel Enthusiast

drpheel

Posted
  • Author
Posted

Pull the plug, plug it into the coil pack, sit it on top of the motor with about 1-2mm between the end of the plug and one of the rocker covers, get a mate to start the car for you (turn your turbo timer off first) and see if there's a spark at the plug. You only need the car runnign for 2-3 seconds (no damage will be done when doing this). Perhaps even pull two and compare them. #6 might be sparking but be very weak.

If you have lots of delicious spark, I'd be looking for a fuel problems such as a leaky or blocked injector.

Great ! I had in mind that I could only do that with a standard spark plug wire and distributor ... Il give it a try in the morning :) Tnx for the input

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