Very rough idle after mod!

[sooner1]

Help! I installed an AEM brute force air intake and now have problems. The burb is harder starting, idles roughly in park, won't hardly idle at all in gear, and throttle response is terrible until upper rpm's when it does accelerate much faster than stock. To top it all off, the check engine light comes on. Do I have to reset the computer? How do I do that? Will the computer eventually reset the fuel/air mixture to even things out? Any help would be greatly appreciated.

Chris

[sooner1]

Anyone?

[GMMerlin]

I installed an AEM brute force air intake

There is your problem! First I would go back and check your work..make sure everything is properly connected and routed..next I would get the code pulled..this might lead you in the direction of the fault.
If this intake had an oil bath filter, the oil may have contaminated the MAF sensor

[Dirtsled]

Sounds like a tater'd MAF or disconnected MAF. Did you get the intake from ebay?

[777stickman]

I installed a K&N FIPK on my '98 7.4(you don't say what year yours is). It ran very rough and hard to start. I disconnected the battery ground for at least one hour to put the pcm back to the relearn mode and all has been good since (1 1/2 years).

[sooner1]

Allright guys, I followed GMMerlin's advice and went back through the install. You have to splice in a wiring extension for the maf and I re-did that paying really close attention to the connections. When I restarted it still ran rough but would idle without my setting in the cab. When in gear, it idled even rougher I haven't had it out on the road, though. The check engine light came on after 10-15min of idleing.
Yes, I bought the intake on e-bay, but came new in box from an online store I recognized from magazines. It smells like it is running rich, and acts like there's a vaccuum leak, I'm stumped. I really thought the stock computer would adjust for the higher air flow.
I did disconnect the battery overnight to try to reset the ecm, but still didn't have any luck.
I suppose I will try the stock airbox tomorrow and see if all goes back to normal. Any other ideas? I'd really like to keep the intake. It looks great and the motor could use the extra oomph.
Chris
Oh, yeah, I forgot to say its a 1997 k1500 with 5.7l vortech and no other mods.

[Dirtsled]

Not bashing the ebay purchase; my point was sometime's they will kit their own intakes and use the cheapest gauze filter's they can find which are usually way "over oiled". That oil gets on the tiny filament in the MAF and ruins it, (like Merlin stated). But that can happen even with a K&N.

Sometimes with a real gentle touch you can clean that filament with a foam "industrial type" q-tip and some alcohol and bring the beast back to life. I did this on a Maxima once and got lucky, tried it on a Blazer and ruined it. So not sure if I would try that right away. Merlin will probably slap my hand for suggesting that.

MAF's aren't too exspensive for OEM's.

Rich smelling? Recheck every place the intake tube has a connection up to the throttle body. If there is an air leak behind the MAF that could throw everything off as well.