Sick '93
Thread Starter
Intermediate
Joined: Jun 2004
Posts: 45
Likes: 0
From: Blawnox PA
Sick '93
Earlier this week replaced water pump, top/bottom rad hose, thermostat, plugs and had injectors cleaned on my '93 LT-1.Opti-Spark OK. Then yesterday after getting gas troubles began. Car began to run horribly--stalling, hesitating, backfiring, pinging etc. Also started to run hot up to 235 degrees. No check engine light came on. What can be the cause---clogged fuel filter, bad O2 sensor, bad MAF sensor, faulty ECM, air in the cooling system? What do I need to check? Afraid it will not make it back to the dealer without craping out. Owning a 'Vette can be frustrating at times.
Race Director
Joined: Aug 2001
Posts: 18,447
Likes: 14
From: Sheboygan Wisconsin
St. Jude Donor '04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14
You say your opti is ok. Changing the water pump would lead me to check that again. You may have gotten it wet. Good luck
Drifting
Joined: Jul 2001
Posts: 1,683
Likes: 1
From: NY
Typically when changing out a water pump it is usually a wise idea to also change the Opti-Spark at the same time. Is the Opti relatively new and that is why you did not change it out also?
Opti's hate water, and there's a chance it could have gotten wet.
Opti's hate water, and there's a chance it could have gotten wet.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
1993s don't have a MAF, they are MAP or Speed Density motors...
Your describing a wet opti. Why did you replace the waterpump?
Are you sure the injectors are ok? Just cause they were cleaned doesn't mean the shop messed them up in the process...
Also, check fuel pressure.
Your describing a wet opti. Why did you replace the waterpump?
Are you sure the injectors are ok? Just cause they were cleaned doesn't mean the shop messed them up in the process...
Also, check fuel pressure.
Thread Starter
Intermediate
Joined: Jun 2004
Posts: 45
Likes: 0
From: Blawnox PA
Sick '93
Problem was condensation in fuel sytem which was solved by adding a bottle of dry gas. Car is not driven very often and I found out from a Service Tech at a local repair shop that when putting gas in a car that sits for long periods there is a risk of this moisture problem surfacing, gas and water don't mix well. Good practice would be to add a bottle of dry gas every time you fill up. Lesson learned.
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