Code 45 - Fuel Cut

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Code 45 - Fuel Cut

Post by superstock2 »

I've got a 1993 L with a full SS drivetrain and engine swap. I picked it up not running. Previous owner didn't know why it wouldn't start. Engine was out of time and after re-timing it fired right up. It had a bunch of vac leaks which I fixed. It now runs and drives great but I'm getting fuel cut at anything over 20% throttle. I replaced the pressure sensor with no luck. I also attempted to clear the codes in the ECU and am either not sure if I did it incorrectly or the code came back immediately. Wondering where to go from here. Any help is greatly appreciated.
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Re: Code 45 - Fuel Cut

Post by jefferson »

I had that and it was a vacuum line off the bottom of the pressure sensor if I remember right.
91 Black SS 5spd. Edm lights, wrx gauges in dash, 45 degree airbox, cryoed drilled and slotted brakes. Invidia divorced downpipe with custom stainless exhaust. To be installed, aluminum a-arms, manual belts, awic.
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Re: Code 45 - Fuel Cut

Post by Legacy777 »

On the turbo cars, code 45 is the pressure sensor and pressure exchange solenoid valve. I would suggest checking all the vacuum lines and the pressure exchange solenoid to ensure it's functioning properly.

If you do all that and are still having issues then I'd suggest checking the wiring of the pressure sensor as well as pressure exchange solenoid. You can find links to the factory manuals on my server in the stuff you need to know forum.

Let us know if you have any questions.
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