Weird Problem ?

stang4u2nv · Oct 3, 2007

So i got this new thing going on with the car now...Sometimes when i start the car in the morning or when it is completely cold, the rpms rise to like 1800 rpms and my check engine light blinks 3 consecutive times and after a minute or 2 the rpms start to go down. the car runs pretty strong and it runs even a little better after I adjusted the tps which was showing 1.1v at idle with the engine off. what can this be caused by? there doesn't seem to be any vacuums leaks and it just happened one day all of a sudden.Note it doesn't do it when it is at normal temperature only when it is cold. thnakls a lot guys i appreciate it. :help2:

Slow95Cobra · Oct 3, 2007

could be a egr prob, or iac acting up... what codes....

stang4u2nv · Oct 4, 2007

that is the thing i haven't scanned the car yet. since i bought the car almost a year ago i disconnected the smog equipment and capped off the headers and the egr but i still got the solenoid in place tho.i'll try cleaning the IAC since i have had two nitrous backfires and the throttle body it is pretty dirty.any other opinions? thanks for your input.

ripper · Oct 4, 2007

2 nitros backfires huh. Id check your intake for a leak.

stang4u2nv · Oct 4, 2007

well i got a 94 with a aluminum intake so i doubt is the intake and the last nitrous backfire didn't even blow out my pvc valve so it wasn't that big could it be my spark plugs because th ecar is running rich as hell after one of the nitrous backfires but i replaced the plugs with new ones and it is still idling like crap. maybe a dirty MAF.

Paul · Oct 4, 2007

stang4u2nv said:
well i got a 94 with a aluminum intake so i doubt is the intake

What exactly does the aluminum have to do with anything? Just curious.

and the last nitrous backfire didn't even blow out my pvc valve so it wasn't that big

Your PCV valve? How exactly would a nitrous backfire blow out the PCV valve? Or how would the size of backfire determine whether the PCV was blown out?

could it be my spark plugs because th ecar is running rich as hell after one of the nitrous backfires but i replaced the plugs with new ones and it is still idling like crap. maybe a dirty MAF.

If it were plugs, don't you think the car would run poorly all the time?

Paul.

stang4u2nv · Oct 4, 2007

well lets see paulie, i don't think aluminum intake manifolds break when there are nitrous backfires, in 5.0 engines usually the first thing to go out of place is the pcv valve since it is just sitting there not held in by anything, and yes the car runs a little rough at all times usually slugish acceleration. so instead of being a dick at "all" times try to be more helpful like other people in these forums, now :gtfo:

ripper · Oct 4, 2007

I was thinking maybe you blew the gasket out. It would take some doin to break the intake. Try the old unlite propane torch trick. Or unplug your fan and hold a cig around it. Just to make sure. It really does sound like a vacuum leak.

zero_chance · Oct 4, 2007

Keep in mind, most cars have a high idle when cold to try and get things to normal operating temp faster. It will usually kick down to normal with a minute or so. As far as the check engine light goes, may or may not be related. Youll have to pull the codes and find out. Easy enough to do without any special tools.

Paul · Oct 4, 2007

stang4u2nv said:
the car runs pretty strong and it runs even a little better after I adjusted the tps...Note it doesn't do it when it is at normal temperature only when it is cold. thnakls a lot guys i appreciate it.

...and then you said:

and yes the car runs a little rough at all times usually slugish acceleration

Your posts are fucked up like a soup sandwich. :slap: :blah2:

stang4u2nv said:
well lets see paulie, i don't think aluminum intake manifolds break when there are nitrous backfires, in 5.0 engines usually the first thing to go out of place is the pcv valve since it is just sitting there not held in by anything, and yes the car runs a little rough at all times usually slugish acceleration. so instead of being a dick at "all" times try to be more helpful like other people in these forums, now :gtfo:

Well let's see dumbass an aluminum intake won't keep your gaskets in place you goon.

When nitrous backfires, it explodes through the intake tract, out through the throttle body, and into the air inlet. The PCV is not in the intake tract. The only thing attaching the two is a vaccuum line. The PCV is for ventilating the CRANKCASE - you know - the area where your pistons, connecting rods, and crankshaft go? If you're blowing out the PCV it's because you have excessive blowby or crankcase pressure, NOT because your nitrous backfired.

But please, continue your efforts to educate me on this subject - I'm eager to hear your thoughts. :

I've never had a super fast racecar like yours and I'm here to learn from experts like you.

Paul.

stang4u2nv · Oct 4, 2007

:lol: man i love this guys he still comes on and writes shit about others people effort to solve a problem. Hey paulie would you do me a favor and :gtfo: if you have something to say, just say it to yourself i think you could use some of your own thoughts. as for the propane or cigarrete trick man i have never heard of those before could you explain more or less how they work so i could test if there are any leaks around my intake. I really appreciate this help guys i'll be waiting on tips and or if i find what went wrong i'll let you guys know. I appreciate the help not to you paulie but others.....thanks guys....

Paul · Oct 4, 2007

Wow. You really are clueless aren't you. How sad.

stang4u2nv · Oct 5, 2007

Yea thanks paulie couldn't figure that one out withtout your help....now :gtfo:

Paul · Oct 5, 2007

Sure thing noob. I'll get right on that.

Post up some more pics of your sweet ride so all of us can drool over the uber-racecar.

Oh, and I'm still waiting to hear an explanation how a car can run "pretty strong" and then immediately "a little rough at all times usually slugish acceleration". Usually my reading comprehension is pretty good, but I'm having trouble making sense of the two statements.

Paul.

stang4u2nv · Oct 5, 2007

Paulie go learn how to drive, you talk and talk but i don't see your 8 sec supercar so :gtfo: and for those of you who helped me the problem was my IAC i checked it and and it was bad, replaced it and it runs like a champs thanks to all (not paulie). not superfast but is still a mustang ...

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Paul · Oct 5, 2007

I'm pretty well sure I can out-drive you, regardless of the venue. Oh, and my cars don't run 8's. They're slow - not nearly as fast as your super-fast racecar. They do have front bumper covers though, so that's nice.

Paul.