Reaperchild

Hey guyz ....

99 camaro ls1 ... issue's with the car mosly when idle where sometime's rpm drops from 800-450 & comes back up & down ...... even when driving & shift to Neutral .... still the same issue rpm goes from 800-450 & wont stop playing around ....

I hv been told to change the INTAKE Filter !!!
Some Say Its the MSD Wire's .... cleaned the Injector's through the tank fluid thing Caltex Power Cleaner .... still no change ... going to change the plugs soon to find out ....

removed 1 spark plug ( first plug to the radiator drivers side ) ... it was white .... garage said petrol is not reaching the plug or something !!!!!!!

Help Please

94'BLKBRD

iTrader: (76)

Check your IAT and MAF sensors.

JFM-jr

iTrader: (23)

Have you set an Service Engine Soon light on the dash?

BaddBird

iTrader: (6)

Sounds like an IAC motor.

zamora7

iTrader: (4)

I would do this too.

Reaperchild

I had my car tuned before with EGR Canceled & stuff ..... the service engine light came out with my oil lever dropping to after 1/4 of the gauge .... OIL FILTER Issue I Figure .... but the rpm issue has been there long scince 3 engine's swaps !!!!! Had the maf sensor changed few months ago ..... Friend of mine say's its the MSD wire's ..... where he had this issue with them installed .... !!

WickedSuperSport

doesnt have an aggressive cam does it?

probably a malfunctioning IAT, MAF, or TPS.

omarrakeen

iTrader: (2)

couldt be anything lol start with easiest and cheapest check the filter then wires but it sounds like maf coz plugs or wires would make it run rough not rpm goes down i think...gd luck

JFM-jr

iTrader: (23)

Oscillating idle wont be from plugs or wires. Sounds like an ECU parameter is seeing a bad signal. TPS/MAF/MAP being possible culprits. No vaccume leaks? I take it you dont have access to logging software?

BaddBird

iTrader: (6)

How is the idle when you first start the car? Does the car hunt for a stable idle or does it idle high?

Reaperchild

Well this car is very moody at mornings .... but really idles @ 1k rpm then drop to 700 rpm ..... issue starts when the car has been moved & goes to a stop !! ....

Reaperchild

service engine light gone away tonight .... no trouble codes ..... talking about TUNE .... THE BEST TUNER HERE DOESNT KNOW ENGLISH !! .... BUT I NEED HIS DYNO !! (RARE)

THIS ISSUE HAS BEEN THERE SCINCE 3 ENGINE'S CHANGED ....!!

Im gonna start with plugs, IAC, MAF !!

Reaperchild

THANKS ALL .... will try the maf tomorrow !!

BaddBird

iTrader: (6)

Pull you IAC motor and see if you have any carbon buildup.

Reaperchild

Doing the swap to LS6 Intake ... hope's this fixes the issue !!