94 corvette viberating at ide when in drive
Thread Starter
Cruising
Joined: Dec 2004
Posts: 12
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94 corvette viberating at ide when in drive
i just changed the plugs , wires , injectors and it still feeling like it is missing , it has a litte vibration when its in drive and im stopped at a light other than that it drives fine. i dont know what else to do .
Thread Starter
Cruising
Joined: Dec 2004
Posts: 12
Likes: 0
yes it was there before the tune up and all the plugs are right and the wires are in right and it still dose it but not as much it only has 47560 miles on it
Last edited by babar sultan; Dec 28, 2004 at 01:56 PM.
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Joined: Oct 2004
Posts: 70
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The next in line would be cap/rotor or coil. Also check the elecrical connection to your opti. I have seen water damage to the pins and corrode them. Make sure there is a good connection there, and the pins are clean.
i almost forgot....a small vacuum leak will also create a low rpm miss. If you spray carborator cleaner around the vacuum hoses and places where the vacuum hoses are connected, the engine will bog down if the carb cleaner finds a leak.
i almost forgot....a small vacuum leak will also create a low rpm miss. If you spray carborator cleaner around the vacuum hoses and places where the vacuum hoses are connected, the engine will bog down if the carb cleaner finds a leak.
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Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by babar sultan
i just changed the plugs , wires , injectors and it still feeling like it is missing , it has a litte vibration when its in drive and im stopped at a light other than that it drives fine. i dont know what else to do .
And in drive it's only noticable when idling?
How long have you had the car?
Where do you live?
Do you wash the engine?
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
Pull the cover off the passenger side see if the 3 way vaccum black thing has a hole in it.I have gone through 2 in the last 25,000 miles.
The heat causes them to cave and start a very small vac leak.
#5 spark plug wire in the opti gets rusty and can cause a misfire.
Or its just a 94 that likes to miss on rainy day's.
Mine always has a miss at idle when it rains or when the coolent temp is below 190 deg.
I have tuner cats and tts and I still can't pin it down.
Just o-hulled the trans that was some of it.
The heat causes them to cave and start a very small vac leak.
#5 spark plug wire in the opti gets rusty and can cause a misfire.
Or its just a 94 that likes to miss on rainy day's.
Mine always has a miss at idle when it rains or when the coolent temp is below 190 deg.
I have tuner cats and tts and I still can't pin it down.
Just o-hulled the trans that was some of it.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Anybody reading this thread, could it be that the EGR valve(if u have it intack!) has carbon/exhaust deposits and is leaking exhaust into intake manifold at idle(which would make it choke and puke at low RPM)???? Check this by plugging EGR mount with thin piece of aluminum, from like a beer can!!!! 
This problem really sounds like emmission control gremlen...
good luck with it...
This problem really sounds like emmission control gremlen...
good luck with it...
Melting Slicks
Joined: Oct 1999
Posts: 2,501
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From: Houston, Texas FEAR THE BONES
2023 C5 of the Year Finalist - Modified
Originally Posted by 93JetJocky
Throttle body cleaning and replace/clean IAC.
I think a dirty TB and IAC could be causing this. Don't forget to reset the minimum idle air after you clean the IAC. There is a Tech Tip on how to do this.You know, the more I think about it, the more it sounds like a bad Opti. My Opti had similar symptoms when it was on its last leg. A new Opti Spark is not cheap, though. I always order mine from www.superchevyperformance.com . Ask for Chris -- he gives a discount to Forum members
.
Last edited by 94vette; Dec 29, 2004 at 10:34 PM.
