No start after sitting.
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6th Gear
Joined: Jul 2023
Posts: 6
Likes: 0
No start after sitting.
Hello, I recently picked up my first corvette. It is a 1994 6 speed car. I bought it off a lady whose husband had recently passed. She said the car had ran two years ago but would stall, they had thought it was a fuel pump. The car will not start at the moment. Cranks nice and fast has a new battery. Anyways, I’ve been messing with it for the past day and have found a few things. When measuring fuel pressure at the inlet line shcrader valve, pressure is good when you first turn the key to on (40+ psi). When cranking, pressure stays around 40 or 42 psi. I pulled injectors out and soaked them in cleaner then Did a bench test. They all opened with voltage applied. I also tested fuel pump which checked out good. I hooked up a noid light to the injector plugs, everything was good there. The car has spark. So with good fuel pressure, spark and opening injectors the car doesn’t even make a pop or stutter. Although I clean injectors and I know they’re opening, should I still replace them? Should fuel pressure fluctuate when engine cranking? Any help is appreciated as I’m relatively new to the corvette world. Thanks
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Joined: Mar 2023
Posts: 61
Likes: 13
From: Palm Beach County, FL
At idle the fuel pressure won’t drop much. The chances of having 8 bad injectors is pretty slim. I think if you had some bad injectors the car would still run (maybe poorly - but still run). I think Optispark is where you need to look. Just because there is spark doesn’t mean the timing is correct.
Thread Starter
6th Gear
Joined: Jul 2023
Posts: 6
Likes: 0
At idle the fuel pressure won’t drop much. The chances of having 8 bad injectors is pretty slim. I think if you had some bad injectors the car would still run (maybe poorly - but still run). I think Optispark is where you need to look. Just because there is spark doesn’t mean the timing is correct.
The car isn’t starting so I’m not sure what the idle pressure is. I figured the injectors were bad from modern day gas and sitting in there for two years. I don’t think it’s a timing issue only because it did run two years ago and nothing has been messed with there. Are there any distributor parts or parts to do with the timing that should be replaced over time? Coil? Obviously spark plugs. Thanks for the reply
Thread Starter
6th Gear
Joined: Jul 2023
Posts: 6
Likes: 0
At idle the fuel pressure won’t drop much. The chances of having 8 bad injectors is pretty slim. I think if you had some bad injectors the car would still run (maybe poorly - but still run). I think Optispark is where you need to look. Just because there is spark doesn’t mean the timing is correct.
mended up being the Optispark. I had no clue what it was nor how problematic they are. Thanks for the help
