Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

TBI injectors not firing on startup

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Old Sep 23, 2014 | 07:41 PM
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smartone4765's Avatar
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Joined: Mar 2012
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From: Tyler and Houston Texas
Car: '92 RS
Engine: Vortec 350 engine code L-31R
Transmission: 700-R4
Axle/Gears: stock rear (for now)
TBI injectors not firing on startup

so my car seems to have a gremlin. All seems well, the car will crank, the fuel pump clicks on, the injectors have pressure (I have an aftermarket regulator with a gauge), the injectors work (I have applied power to them directly) but they do not fire when cranking. I was able to get the car to run by cranking while spraying brake cleaner into the intake. Once the engine fired and ran for a few seconds, the injectors started working again. unfortunately this seems to have been a one trick pony as when I tried the same cheat again I was unable to get the injectors to kick on.

Thoughts?

Its gotta be a wiring issue or a problem with the ECU right? there arent any relays for the TBI injectors are there?
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