1993 engine problem
Thread Starter
Navigator
Joined: Nov 2005
Posts: 9
Likes: 0
1993 engine problem
Hi Everyone,
I have a 1993 Corvette with an engine problem,
when it sits ideling it is fine, when you press the pedal it has a slight hesitation but revs fine, when you put it in drive it starts to misfire and has no power. Does anybody have any idea what the problem maybe. the leads and plugs have all been changed and hasnt made any difference.
Thanks in advance for any help,
Mark
I have a 1993 Corvette with an engine problem,
when it sits ideling it is fine, when you press the pedal it has a slight hesitation but revs fine, when you put it in drive it starts to misfire and has no power. Does anybody have any idea what the problem maybe. the leads and plugs have all been changed and hasnt made any difference.
Thanks in advance for any help,
Mark
Safety Car
Joined: Aug 2009
Posts: 3,752
Likes: 278
From: Melbourne, Victoria, Australia
Hi
Always a good idea to check the injectors are working, best way to check is start the car from cold run it for20 or 30 seconds turn the engine of and feel the headers for any cold ones. This is how i found out i had a bad injector connector which showed 12 volt pulses on my meter when removed from the injector.
You can also remove the spark plug leads one by one with good insulated pliers,while listening for changes in idle speed. Also check your TPS voltage
Good luck
Always a good idea to check the injectors are working, best way to check is start the car from cold run it for20 or 30 seconds turn the engine of and feel the headers for any cold ones. This is how i found out i had a bad injector connector which showed 12 volt pulses on my meter when removed from the injector.
You can also remove the spark plug leads one by one with good insulated pliers,while listening for changes in idle speed. Also check your TPS voltage
Good luck
Burning Brakes
Joined: Nov 2008
Posts: 995
Likes: 1
From: Naples Campania
I don't know about removing the spark wires... It's easier to remove the clips on the injectors themselves. You can check spark more easily and in a safer way using a timing light. If it's flashing, the cable is good. I don't car how insulated your are, you can still get a nice shock from the cables.
Ohm out your injectors. A $10 multimeter at walmart will work. I don't know exactly what they are supposed to be, but make sure they are all pushing the same.
Also, check your timing. Your motor may run fine at idle, but if timing is a little bit off, your spark will come too early or too late in the piston movement and either impede (early) or lose compression at the time of detonation (late).
These are tricky cars and can be picky about timing.
Ohm out your injectors. A $10 multimeter at walmart will work. I don't know exactly what they are supposed to be, but make sure they are all pushing the same.
Also, check your timing. Your motor may run fine at idle, but if timing is a little bit off, your spark will come too early or too late in the piston movement and either impede (early) or lose compression at the time of detonation (late).
These are tricky cars and can be picky about timing.
Banned Loser
Joined: Aug 2009
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From: They say you learn from your mistakes, I must be a genius
2017 Corvette of the Year
2016 C4 of Year Finalist
Creator of the "Original" whining and crying thread
St. Jude Donor '14-'15-'16-'17
First off, check for codes. Running like this it's got to be throwing a code.
