No fuel with spark?

1991 CHEVROLET TRUCK
167,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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DAVID9082
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  • 3 POSTS
I have a new distributor and components, new fuel relay; new spark plugs and wires. I’m on TDC I have fuel to TBI but no fuel in bowl I checked injectors, and they have pulse. I disconnected the HEI bypass and got fuel but if I continue it no fuel. Could it be the TBI fuel regulator the wires going to the injectors and the bypass what is up with that I’m thinking two different things.
Apr 14, 2023 at 10:15 AM
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STRAILER
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  • 55,256 POSTS
The first thing you need to do is check the fuses.

Here is a guide to help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse


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Apr 15, 2023 at 3:30 AM
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DAVID9082
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I’ve already checked all that.
Apr 16, 2023 at 2:27 AM
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STRAILER
  • ✓Experienced Mechanic
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Okay, I didn't know, please unplug the fuel injectors one at a time to see if the pulse comes back, you may have a shorted injector. Also, let's run the codes to see what comes up.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Please go over this guide and report back. Also, can you see if the engine runs on starting fluid?
Apr 17, 2023 at 3:09 AM
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DAVID9082
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It’s not the injectors. There are two problems I believe there’s a short in the tan/black wire going to ECM because it doesn’t fire when it’s plug in verse unplugged when unplugged I get spark and fuel but no fuel to the regulator so in that I believe the regulator needs to be changed out. I disconnected the gas line to the TBI, and I get fuel when tan and black are unplugged The tan and black is “hei bypass”.
Apr 18, 2023 at 6:36 AM
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