View Full Version : sr20det rough idle

08-11-2013, 09:21 AM
hey guys i have a red top sr in my s13. i just recently did the swap and i could never get it going just right. ill tell u what i have done to it. its all stock just a fmic and full exhaust. thats it. stock ecu i am running bkr7e ngk plugs gapped to .28 stock maf. now what it is doing is running really rough at idle. but if i drive it normal it runs 110% pulls really hard just runs amazing. but at idle it runs like complete crap. i messed with plug gap but it runs the best at .28. and i messed around with my iacv screw. i did timming with a light and it ran a bit slower than it is now when it was at 15 deg. btdc. so i advanced it a touch and it runs alot better at idle and at wide open throttle so i left it like this. my tps is set to .43 ish when closed and at wop it is at about 5.03 so thats all set. now the only thing i can think of is a leaky injector maybe. like when low psi it is spitting out but when i rev or drive it it blasts threw... idk. and one more thing i would like to share is when i rev the gas eather with my foot or with my hand on the throttle boddy pulley, it has like a 1 second delay. say if i rev the gas. it takes like 1 second for the car to rev. almost like i have 30 feet of intercooler piping.... so thats an issue too. any help, advice or tips on eather the reving delay problem or the rough idle would be a big help. thanks guys

08-11-2013, 10:23 AM
Check all the wires to the MAF and make sure there all working and so is the MAF, Also you could push the TPS the whole way and see how that works. With that one second delay is your cable set right? not to much give?

08-11-2013, 10:35 AM
Set perfect man. I have hand a few srs and done a few swaps and never seen that delay prob. But my maf is good. Original wiring too no problems with it

08-11-2013, 10:44 AM
What does it idle at?

08-11-2013, 06:21 PM
i couldnt tell you, the tach doesnt work but its all over the place when its at idle