Question about 1993 Chevrolet Corvette
New spark plugs, but no change; wires? coil?optispark? all seem to be very well. Just bought it. The other owner only drove 400 miles in nearly 10 years.
Very hard to say what is wrong, do you have any kind of car history like if the waterpump was leaking or replaced? If so like my 1994 vette the pump is in the front of opti-spark 99.9 percent of the time the water will ruin the opti. I have replacement mine many times, mainly because of the waterpump. if you replace pump you Must change opti-spark, its right there in open after you take out pump.it will save you 4 hours labor time.
Posted on Dec 21, 2013
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Posted on Jan 02, 2017
When an engine is overheating and then the temp drops on the guage, it's usually a sign that the coolant is not touching the temp sensor. There's no coolant in the engine. Putting water in the overflow tank won't solve this. Take the radiator cap off after the engine cools and put coolant in the radiator. you might have to crank the engine and do this several times, as the engine can develop air pockets that won't allow the coolant to travel inside the engine. If you don't see any leaks, and it still uses coolant, you've probably got a blown head gasket. Check for water on the plugs, check cylinder compression. If it slowly uses coolant, try putting a large box of pepper in the radiator or some of that radiator seal copper flakes.
Posted on Dec 22, 2008
SOURCE: 89 s10 blazer no spark
There is no test for module in distributor, but they often cause this kind of problem. Also while in there, check the pickup coil wires to make sure they are intact.
Posted on Mar 14, 2009
did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
Posted on Feb 28, 2010
im having the same problem as you had with your truck, have you had any success with it, if you have could you let me know!!
Posted on Dec 14, 2010
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