95 Optispark rust problem
Thread Starter
Advanced
Joined: Sep 2004
Posts: 54
Likes: 0
95 Optispark rust problem
My 1995 had the optispark and water pump replaced by the Chevy dealer. It runs about 3,000 miles and then starts missing again. The dealer has replaced the optispark 3 times now over the last 9 months at no charge. They have most recently replaced all vacuum lines. Anyone had this problem?
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
What is going wrong on them?
How did you know it needed replaced any codes?
Did they all have water in them? Can not see how that would be unless your water pumps are going too.
You don't happen to wash your engine do you?
How did you know it needed replaced any codes?
Did they all have water in them? Can not see how that would be unless your water pumps are going too.
You don't happen to wash your engine do you?
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
THAT is wierd. Chris Petris told several of us in a recent C4 class that the 95 and 96 Opti normally lasts for about 100,000 miles.
Shoot him an e-mail at chris@corvetteclinicinc.com and tell him that Ron with the loud mufflers wanted to know. Then tell us what he comes up with.
Shoot him an e-mail at chris@corvetteclinicinc.com and tell him that Ron with the loud mufflers wanted to know. Then tell us what he comes up with.
1st Gear
Joined: Jun 2005
Posts: 1
Likes: 0
I have the same problem. I have a 96 LT1. I drive for about a mile the it starts to mis fire. The mis fire only lasts for about 1 mile or so.
I replaced the following"
New Opti Spark . Cap Rotor.
NewFuel pressure reg.
New MSD Wires & Coil.
New Plugs
The only thing I havent replaced is the fuel filter.
I replaced the following"
New Opti Spark . Cap Rotor.
NewFuel pressure reg.
New MSD Wires & Coil.
New Plugs
The only thing I havent replaced is the fuel filter.
Thread Starter
Advanced
Joined: Sep 2004
Posts: 54
Likes: 0
No trouble codes according to the dealer. The water pump is not leaking. The engine would miss and then run fine for a day or so and then totally quit. I had to be towed 2 times to the dealer. No water on the engine. It is not washed. The Chevy dealer customer care center told them to make sure that the vacuum lines are not stopped up. I'm waiting for it to happen again.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
The vacuum to the opti is only there on the 95-96 models to put a positive vent on it rather than the static vent the previous models had.
I some how doubt the service tech tried to analyze the failed (or subject) opti when they replaced them. They are most likely just returned.
Is it possible that the ignition module/ignition coil are subject? I suppose it's possible to have a couple out of the box failures but the probability is rather remote after this many exchanges. Something else is causing the problem or inducing the problem. I don't suppose they checked the wires with a DVM to ensure its not a failing wire?
I some how doubt the service tech tried to analyze the failed (or subject) opti when they replaced them. They are most likely just returned.
Is it possible that the ignition module/ignition coil are subject? I suppose it's possible to have a couple out of the box failures but the probability is rather remote after this many exchanges. Something else is causing the problem or inducing the problem. I don't suppose they checked the wires with a DVM to ensure its not a failing wire?
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Originally Posted by 74c395c4
The service manager said it looked bad .
another high tech analysisIf you had no codes it sounds like poke and hope mechanics.I would not trust them.They should have told you exactly what was wrong with the ones they took out I always ask for the replaced part( and let them know I will be) when I pick the car up it is good pratice and keeps them honest
If it was truely bad optis with no codes that means cap&rotor went south. If it happened 3 times then either you are over reving your car our there are other issues to look at. Good Luck
Melting Slicks
Joined: May 2003
Posts: 2,496
Likes: 1
From: alaska
well that would be a bummer.
for you and the dealer as well.im sure they will figure it out.good thing its under warranty.
could you imagine the same dealership exchangin an opti 3 times if one of us yard mechs did a garage repair on that?
i bet you would have a hard time getting your money back.
its a good thing its them doing the install
one more reason to go with the deltq or similar setup instead of a new optispark.man that would kill me to pay through the nose for an opti and have the new one be bad and then have them not warranty it.
for you and the dealer as well.im sure they will figure it out.good thing its under warranty.
could you imagine the same dealership exchangin an opti 3 times if one of us yard mechs did a garage repair on that?
i bet you would have a hard time getting your money back.
its a good thing its them doing the install
one more reason to go with the deltq or similar setup instead of a new optispark.man that would kill me to pay through the nose for an opti and have the new one be bad and then have them not warranty it.
Melting Slicks
Joined: May 2003
Posts: 2,496
Likes: 1
From: alaska
Melting Slicks
Joined: May 2003
Posts: 2,496
Likes: 1
From: alaska
interesting to go back now and rethink this all.
i ended up with a newer style opti and swore to do the cam upgrade and all whenever my opti misfired but its still purring like a kitten.
well, now that i think about i did have er up and quit on me the last trip out this summer.
puff of smoke and raw gas smell and she just died on a low idle coast up to a stop sign.
no restart either.pushed it across the street and called for a tow but when my bud showed up we tried again and restarted.
it was flooded,had to floor it to get it to catch,cleaned out quick though and then ran fine for 30 miles home.
i wasnt suspecting opti, was betting fuel pump (could hear it btw), but now maybe i better consider that opit upgrade for next spring
i ended up with a newer style opti and swore to do the cam upgrade and all whenever my opti misfired but its still purring like a kitten.
well, now that i think about i did have er up and quit on me the last trip out this summer.
puff of smoke and raw gas smell and she just died on a low idle coast up to a stop sign.
no restart either.pushed it across the street and called for a tow but when my bud showed up we tried again and restarted.
it was flooded,had to floor it to get it to catch,cleaned out quick though and then ran fine for 30 miles home.
i wasnt suspecting opti, was betting fuel pump (could hear it btw), but now maybe i better consider that opit upgrade for next spring
