car runs rough. . .?

[87GNcospg]

my 87 GN runs perfect and very smooth when i first start it up and let it warm up. then when i shut it off for say 15 to 30 minutes and start it back up again it idles very rough and acts like it is going to die. once i put it in gear and drive it for a few minutes it acts normal again except that it will die on me on rare occasions. i know this isnt much info but has anyone else had this problem?

 

[GNBeswick]

That's interesting, my GN does the same thing, except it does it when it's cold, upon start up. After driving it a couple of mins it runs fine, and mine also dies rarely. I presented this problem before, and was given the suggestion to check/replace my coolant sensor, though I havnt tried that yet.

 

[BADINBLACK6]

Could be a bad MAF sensor when they go bad or start to go bad they cause all kinds of weird problems. Is it an original GM MAF or a reman.?

 

[87GNcospg]

looks to be an original if not a gm replaced one

 

[kjhansen]

Have you tried the "tap test" on the MAF? Idling, take something hard (like a screwdriver handle) and tap the MAF. Does it change your idle characteristics when you do that? (Speed up, stutter, etc.) I would recommend going with the LT1 MAF and the Translator. See Ramchargers.com and order the MAF from GM Parts Direct.

Keith

 

[87GNcospg]

is that the only way to test forbad MAF? with how clumsy i am i will probably smack it hard enough to break it anyways even if its not broken.
other than being able to tune my car more, if i go that route, with the LT1, will there be any noticeable performance gains with just the new MAF.

 

[77tech9]

No gains without other mods. Stock injectors only go so far.

 

[BigTurbo6]

My O2 sensor did weird things after only a year of use, car ran pretty bad. Bought a denso and haven't had any more problems. Just a thought.

 

[kjhansen]

Originally posted by 87GNcospg
is that the only way to test forbad MAF? with how clumsy i am i will probably smack it hard enough to break it anyways even if its not broken.
other than being able to tune my car more, if i go that route, with the LT1, will there be any noticeable performance gains with just the new MAF.

The only other way I know of is to swap with a known good MAF. Since I'm not there anymore you're going to have to find someone with a Turbo Regal to swap with. (I think that Dave Edwards left too.) There is another TR on Peterson, but I don't know who it belongs to. Maybe if your Dad sees it he can leave a note on the windshield. Jose at the auto parts store on Academy and Pikes Peak has an older TR and might know somebody in the area with a newer one with a MAF like yours.

Keith

 

[77tech9]

If you didn't notice, I live like 30 minutes away from him

15 minutes in TR time.

 

[kjhansen]

No I didn't read your sig block. There ya go 87GN. You guys get together.
Keith