Rough Idle

[Nefarious21]

Hey guys, I installed the ssafc over a year ago and since then I have always had rough idle on cold start up.
Does anyone else have this problem? It only lasts under half a minute and then runs fine.

Upgrades are only FMIC, relocated maf, and the ssafc. Running 10lbs

 

[mazdaspeedp]

Have you checked your exhaust manifold for cracks or broken studs?

 

[Nefarious21]

Yeah, no exhaust manifold leaks. If I do, it's probably a small crack that I can't see.
But this only started happening after the ssafc install.

 

[hornsfan10609]

Maybe it's your settings on the AFC, it shouldn't 'activate' until it sees boost so there should be no effect on the idle.

 

[polaris]

Funny, most MSP idle problems are the exact opposite of what you described. Usually they run fine on cold start, but idles rough once it warms up.

 

[Nefarious21]

Maybe it's your settings on the AFC, it shouldn't 'activate' until it sees boost so there should be no effect on the idle.

That's what I was thinking but I haven't changed anything from the original tune it came with. Unless I was suppose to, but never read about.

Funny, most MSP idle problems are the exact opposite of what you described. Usually they run fine on cold start, but idles rough once it warms up.

Yeah I'm lucky there haha Every once in a blue moon the idle will drop a little low, but nothing serious.

Also when I try to hit the gas pedal it sputters like a failing MAF sensor, but I've tried a known working one and get the same results.
I think I am going to check before and after MAF voltages from the SSAFC.