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90 RS LO3 TBI Won't Start

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Old 05-12-2023, 01:54 PM
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Car: '90 RS Vert
Engine: 305 TBI
Transmission: 700-R4
90 RS LO3 TBI Won't Start

About 18 months ago I got hit by a deer. (ran into the side and rolled front to back leaving dents.) I drove home and parked the car. My workload prevented me from doing anything with it until now. The car was running perfectly when parked.

Now, I have gone out and put in good gas along with some seafoam to deal with whatever condensate that might be in the tank. When I turn the key I hear the fuel pump run until it gets up to pressure then it shuts off. I turn the key to engage the starter and the engine turns over. I can see on the gauge that it is building more than enough oil pressure. Yet, the motor just turns over and over with no sign of cranking.

I purchased some starting fluid. It actually attempted to catch once. Now even Starting fluid gets no positive response from the engine.

I have checked the fuses for injectors, and any others under the dash that seemed appropriate. All fused looked good.

What am I missing? What should I try next?
Old 05-12-2023, 07:47 PM
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Car: 1991 camaro convertible
Engine: LS3
Transmission: 6l80
Axle/Gears: Ford 8.8 3.31 torsen t2r
Re: 90 RS LO3 TBI Won't Start

Well , first did you put good gas on top of bad? I you did now you just have more bad gas. When you take air cleaner ,can you see the injectors spraying when you crank it? Do you have spark?
Old 05-13-2023, 01:32 PM
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Car: '90 RS Vert
Engine: 305 TBI
Transmission: 700-R4
Re: 90 RS LO3 TBI Won't Start

Bad gas? Yes and no... The gas that was in it had been treated with seafoam. There wasn't much left in there. The gas that I added was also mixed with seafoam.
Unfortunately I am working alone on this project. I don't have a helper to turn the key so that I can observe the the injectors. There might be a fuel
problem but I would expect the problem to be spark since it will not even fire off using starting fluid...

I ordered a new Distributor Cap, button, and coil. Unfortunately they did not come in today...

Thank you for your input on this! I really want to get the ole girl fixed up and back on the road!


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