Another stumble stutter thread. need advice please!
Thread Starter
7th Gear
Joined: Sep 2009
Posts: 7
Likes: 0
Another stumble stutter thread. need advice please!
I think I've read all the threads pertaining to my issue. Lots of great info here!
I purchased my first Corvette last fall, '94 6spd w/49K. It needed a little TLC.
it runs fine untill it warms up, the hotter the temp gets the worse the miss. Below 2k and at WOT (or heavy throttle) it runs fine. the stutter is prominate between 2-3k under light throttle. once it reaches 3k it picks back up like nothing is wrong.
I'm trying to fix this issue myself. last resort changing the Opti, which I'll pay to have done.
Here's what I've done so far.
Plugs/wires
ICM
Coil
confirmed injectors, all at 12ohm.
20mph WOT in 5th gear. no stutter.
Any ideas?
thanks in advance for your input.
I purchased my first Corvette last fall, '94 6spd w/49K. It needed a little TLC.
it runs fine untill it warms up, the hotter the temp gets the worse the miss. Below 2k and at WOT (or heavy throttle) it runs fine. the stutter is prominate between 2-3k under light throttle. once it reaches 3k it picks back up like nothing is wrong.
I'm trying to fix this issue myself. last resort changing the Opti, which I'll pay to have done.
Here's what I've done so far.
Plugs/wires
ICM
Coil
confirmed injectors, all at 12ohm.
20mph WOT in 5th gear. no stutter.
Any ideas?
thanks in advance for your input.
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
I think I've read all the threads pertaining to my issue. Lots of great info here!
I purchased my first Corvette last fall, '94 6spd w/49K. It needed a little TLC.
it runs fine untill it warms up, the hotter the temp gets the worse the miss. Below 2k and at WOT (or heavy throttle) it runs fine. the stutter is prominate between 2-3k under light throttle. once it reaches 3k it picks back up like nothing is wrong.
I'm trying to fix this issue myself. last resort changing the Opti, which I'll pay to have done.
Here's what I've done so far.
Plugs/wires
ICM
Coil
confirmed injectors, all at 12ohm.
20mph WOT in 5th gear. no stutter.
Any ideas?
thanks in advance for your input.
I purchased my first Corvette last fall, '94 6spd w/49K. It needed a little TLC.
it runs fine untill it warms up, the hotter the temp gets the worse the miss. Below 2k and at WOT (or heavy throttle) it runs fine. the stutter is prominate between 2-3k under light throttle. once it reaches 3k it picks back up like nothing is wrong.
I'm trying to fix this issue myself. last resort changing the Opti, which I'll pay to have done.
Here's what I've done so far.
Plugs/wires
ICM
Coil
confirmed injectors, all at 12ohm.
20mph WOT in 5th gear. no stutter.
Any ideas?
thanks in advance for your input.
Instructor
Joined: Aug 2001
Posts: 110
Likes: 0
From: Wichita KS
i think if you can change wires and plugs, you can change the opti too.
I am having the same problem, but in a camaro LT1. I just did the opti because i found the cap had a crack, while there i also did the plug wires and did the plugs about 1k miles back. No difference.
I would also check the fp, and if you can get a datalogger on the car.
matt
I am having the same problem, but in a camaro LT1. I just did the opti because i found the cap had a crack, while there i also did the plug wires and did the plugs about 1k miles back. No difference.
I would also check the fp, and if you can get a datalogger on the car.
matt
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
You said it all with "stealership". There might not be anyone in the shop who has ever been under the hood of a C4. I would look for a Corvette tuner if I got stumped. The dealer will throw parts at the problem, and if they installed a part, you "needed" it.
Melting Slicks
Joined: Aug 2008
Posts: 2,082
Likes: 50
From: Palmdale CA
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Instructor
Joined: Jul 2009
Posts: 242
Likes: 7
From: Bowling Green KY
Checking the ohms on the injectors doesn't make them right. Mine were all perfect, but they were horribly clogged, causing it to run very rough at certain parts of the power band (shuddering probably from fuel deprivation), and it idled horribly. I bought a set of rebuilt injectors, and it ran perfect.
Checking the ohms on the injectors doesn't make them right. Mine were all perfect, but they were horribly clogged, causing it to run very rough at certain parts of the power band (shuddering probably from fuel deprivation), and it idled horribly. I bought a set of rebuilt injectors, and it ran perfect.
It's easy to check. Find my thread, "94 has a miss.... opinions?" and you'll see all that we did to fix it.
Checking the ohms on the injectors doesn't make them right. Mine were all perfect, but they were horribly clogged, causing it to run very rough at certain parts of the power band (shuddering probably from fuel deprivation), and it idled horribly. I bought a set of rebuilt injectors, and it ran perfect.
It's easy to check. Find my thread, "94 has a miss.... opinions?" and you'll see all that we did to fix it.
Thread Starter
7th Gear
Joined: Sep 2009
Posts: 7
Likes: 0
Checking the ohms on the injectors doesn't make them right. Mine were all perfect, but they were horribly clogged, causing it to run very rough at certain parts of the power band (shuddering probably from fuel deprivation), and it idled horribly. I bought a set of rebuilt injectors, and it ran perfect.
Checking the ohms on the injectors doesn't make them right. Mine were all perfect, but they were horribly clogged, causing it to run very rough at certain parts of the power band (shuddering probably from fuel deprivation), and it idled horribly. I bought a set of rebuilt injectors, and it ran perfect.
It's easy to check. Find my thread, "94 has a miss.... opinions?" and you'll see all that we did to fix it.
Checking the ohms on the injectors doesn't make them right. Mine were all perfect, but they were horribly clogged, causing it to run very rough at certain parts of the power band (shuddering probably from fuel deprivation), and it idled horribly. I bought a set of rebuilt injectors, and it ran perfect.
It's easy to check. Find my thread, "94 has a miss.... opinions?" and you'll see all that we did to fix it.
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
