slight misfire at idle
Thread Starter
Drifting
Joined: Apr 2001
Posts: 1,744
Likes: 72
From: Cincinnati OH
slight misfire at idle
been having the 2000 vert i picked up gone through
the only thing the guy said he was picking up was a code about an idle air relearn or something. he said you'd get like 100 misses in 20 minutes at idle, since changing the plugs, it's now down to 20 after idling for 20 minutes. it's #2
he said the car isn't showing any miss at normal driving or at wot, he said from talkin to his guy at chevy the computer may need a reflash or something. it isn't throwing a CEL
any input there?
he did try switching coils and plugs to see if it followed the coil or the plug and it did not.
the only thing the guy said he was picking up was a code about an idle air relearn or something. he said you'd get like 100 misses in 20 minutes at idle, since changing the plugs, it's now down to 20 after idling for 20 minutes. it's #2
he said the car isn't showing any miss at normal driving or at wot, he said from talkin to his guy at chevy the computer may need a reflash or something. it isn't throwing a CEL
any input there?
he did try switching coils and plugs to see if it followed the coil or the plug and it did not.
Tech Contributor
Joined: Jan 2007
Posts: 19,476
Likes: 1,171
From: Dyer, IN
been having the 2000 vert i picked up gone through
the only thing the guy said he was picking up was a code about an idle air relearn or something. he said you'd get like 100 misses in 20 minutes at idle, since changing the plugs, it's now down to 20 after idling for 20 minutes. it's #2
he said the car isn't showing any miss at normal driving or at wot, he said from talkin to his guy at chevy the computer may need a reflash or something. it isn't throwing a CEL
any input there?
he did try switching coils and plugs to see if it followed the coil or the plug and it did not.
the only thing the guy said he was picking up was a code about an idle air relearn or something. he said you'd get like 100 misses in 20 minutes at idle, since changing the plugs, it's now down to 20 after idling for 20 minutes. it's #2
he said the car isn't showing any miss at normal driving or at wot, he said from talkin to his guy at chevy the computer may need a reflash or something. it isn't throwing a CEL
any input there?
he did try switching coils and plugs to see if it followed the coil or the plug and it did not.
Thread Starter
Drifting
Joined: Apr 2001
Posts: 1,744
Likes: 72
From: Cincinnati OH
Tech Contributor
Joined: Jan 2007
Posts: 19,476
Likes: 1,171
From: Dyer, IN
Is this your car that you purchased with a known problem, or someone else's car?
What are the current codes on the DTC? How many miles? Any mods?
Thread Starter
Drifting
Joined: Apr 2001
Posts: 1,744
Likes: 72
From: Cincinnati OH
he said it was something about an idle air relearn or something, he's not in right now, he was in an accident.
he said he had talked to a friend of his at chevy (i'm at a local shop that does a lot for me) and he said that the guy there had said something about flashing the pcm,
i'm probably gonna get a dyno tune
the car drives fine, there is no cel and no mis a normal driving or wot.
he's thinking the code was from before in the system
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
There is no "flash" for a mis-fire .... what plugs, plug gap, and wires did he put in ??? Did he check the fuel injector for #2 ?? If it ain't spark, it's fuel. What was the code ?? An engine code will usually turn on the CEL, so you should verify that a DTC had been set, a misfire DTC will illuminate the CEL.
Bottom line, find someone who gives you a better explanation of the problem, and what has been done to fix it.
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Thread Starter
Drifting
Joined: Apr 2001
Posts: 1,744
Likes: 72
From: Cincinnati OH
There is no "flash" for a mis-fire .... what plugs, plug gap, and wires did he put in ??? Did he check the fuel injector for #2 ?? If it ain't spark, it's fuel. What was the code ?? An engine code will usually turn on the CEL, so you should verify that a DTC had been set, a misfire DTC will illuminate the CEL.
Bottom line, find someone who gives you a better explanation of the problem, and what has been done to fix it.
they don't work on a lot of vettes there, they do mostly brakes, alignments, stuff like that,
he told me the flash wouldn't be for the "misfire" he said it's possible the misfire is coming from the code that had to do with the iac relearn. i'll have to find out exactly how he explained it and write it down, it's been a couple days, now i'm fuzzy again on the whole thing lol
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
they don't work on a lot of vettes there, they do mostly brakes, alignments, stuff like that,
he told me the flash wouldn't be for the "misfire" he said it's possible the misfire is coming from the code that had to do with the iac relearn. i'll have to find out exactly how he explained it and write it down, it's been a couple days, now i'm fuzzy again on the whole thing lol
he told me the flash wouldn't be for the "misfire" he said it's possible the misfire is coming from the code that had to do with the iac relearn. i'll have to find out exactly how he explained it and write it down, it's been a couple days, now i'm fuzzy again on the whole thing lol
Start engine
Turn OFF the A/C system (if ON)
Set Parking brake and/or block wheels
Ensure engine is at normal operating temperature
Shift into DRIVE and allow engine to idle for 5 minutes
Shift into PARK
Allow engine to idle for 5 minutes
Turn OFF the engine for AT LEAST 30 seconds (the PCM is storing its idle calculations during that time)
You are done ...
A manual is even worse .... let idle in NEUTRAL for 5 minutes, turn OFF the engine for at least 30 seconds.
Thread Starter
Drifting
Joined: Apr 2001
Posts: 1,744
Likes: 72
From: Cincinnati OH
and the verdict is
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no gap on plug in cylinder # 2.
after i picked the car up, it was violent as hell at idle, threw a misfire code on cyl#2 right away,
took it to chevy, they called me after a couple hours this morning, they didn't gap the plug,
i know i'm mostly a driver, but for christs sakes, even i know, if you have a miss, the first thing you do is check the damn plug,
he even told me they moved around plugs and wires and stuff to see if it stayed with the cylinder.
m o r o n s
other than tires, i'll never go back there lol
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no gap on plug in cylinder # 2.
after i picked the car up, it was violent as hell at idle, threw a misfire code on cyl#2 right away,
took it to chevy, they called me after a couple hours this morning, they didn't gap the plug,
i know i'm mostly a driver, but for christs sakes, even i know, if you have a miss, the first thing you do is check the damn plug,
he even told me they moved around plugs and wires and stuff to see if it stayed with the cylinder.
m o r o n s
other than tires, i'll never go back there lol
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Take ALL of your business elsewhere ... that is one seriously incompetent shop .....
