Replaced O2's, Cleaned MAF. Idle Still Sucks.

[brentwoodboy]

My idle searches from about 600-800 rpm. My most recent mod is the off-road H. Do I have an exhaust leak? I have a CE light also, but my car will not connext and give codes to any scanner . TPS has been replaced also. Any guesses?

PS. CE light comes on after warm up, but my 02's are brand new...

 

[ejjmustang]

My idle searches from about 600-800 rpm. My most recent mod is the off-road H. Do I have an exhaust leak? I have a CE light also, but my car will not connext and give codes to any scanner . TPS has been replaced also. Any guesses?

PS. CE light comes on after warm up, but my 02's are brand new...

My car does the same thing but I don't know what the heck it is. Does miss at all??

 

[Rootus]

I would figure out how to get the codes, since you definitely have something going on there. You don't need a scanner, you can also do it with a paperclip (do a search). Have you gone to autozone -- they'll pull the codes for free...

 

[Silver85TC]

You're Engine Coolant Temp (ECT) sensor may be shot (tells the computer your engine is cold/hot when its not!). They get lazy over the years....just enough to screw up your idle, but not enough out of range to set off your CEL.

Cheers.

 

[ChingoChee]

I had a similar problem. I cleaned my MAF and replaced my O2 sensors and my TPS. Turned out that my old but newly cleaned MAF was still faulty, so I threw in a brand new one and it fixed the idle 100%. A new stock MAF is only 50-60 bucks, so it might be something to consider. Good luck.

 

[Slow5.0]

I know whats wrong , I had same problem like you , HEGO fuse is blown, check Under steering column/ under dash HEGO fuse thats #10 20A, and meybe you change O2sensors for nothing , just like me

 

[brentwoodboy]

Thanks, but keep em' comin. Also, I replaced my ECT this summer.

 

[red94fiveo]

I also had the same problem and i wound up being a bad TPS (this was at 66K miles). This was when I first bought my car so I had the dealership fix it b/c I didn't know much about the car. For the $275 they charged me for a new TPS I could have bought a Ford Racing 65mm T-body which comes with a new TPS, just some food for thought.

 

[brentwoodboy]

I also have a new TPs, sorry I didn't mention that.

 

[984.6gt]

600-800 is not that bad, should be able to live with that, anything under 900 is decent, I have see guys go from 500-1500, now THAT is an idle problem.

 

[Kdizzite]

I had this problem and i replaced the sensors, and cleaned the filter and maf sensor. It ended up being that when i put the IAT sensor back in my cai tube it wasnt completly sealed, and that tiny leak was enough to make the idle surge.