Subject	Rough idle and small backfires
Posted by	elisvk on April 28, 2012 at 10:44 PM
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Message	Hi. I have a 1990 300zx TT with 666cc injectors running 17psi jwt ecu and k&n intake. I'm having a massive problem with the performance of my Z. I have absolutely no problem starting it. It starts on the very first crank every time even when cold. When the car is hot theres a rough idle. It may drop down to 500 rpm and sound really lumpy. Then it can run on 800 rpm normally just fine. The biggest problem is that when I accelerate past about 4500 rpm it just chokes and it sounds like a cylinder cuts out. This doesn't really happen in 1st gear but past 1st and it's like driving a 200whp car. So far I've only changed the fuel filter and I definitely noticed a difference but that may just be cause the fuel filter had not been replaced for a long time. Please help me troubleshoot this problem :) Best regards from Iceland :p
Follow Ups	Rough idle and small backfires - elisvk 22:44:47 04/28/12 Re: Rough idle and small backfires - elisvk 22:56:54 04/28/12 Re: Re: Rough idle and small backfires - TurboTurtle 23:29:49 04/28/12 Well its obvious you are running rich if it is backfiring - JoshE300zxTT 19:04:18 04/29/12 Re: Rough idle and small backfires - mkhoid 04:57:07 04/29/12 Small pops sound like an exhaust leak to me... - Black95 13:07:23 04/29/12 Re: Small pops sound like an exhaust leak to me... - elisvk 17:05:29 04/29/12 Do you have a wideband or conzult? Whats your AFR at idle - JoshE300zxTT 18:41:55 04/29/12 Re: Do you have a wideband or conzult? Whats your AFR at idle - elisvk 18:46:03 04/29/12
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