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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old 05-20-2006, 03:41 PM   #1
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Engine shuts off when shifting from drive to reverse

I have a 90 firebird formula with an LB9 TPI 5.0 V8 engine. My car sometimes shutoffs when I shift from drive to reverse. Someone told me that I may have a bad MAP sensor. My car starts up everytime.
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Old 05-20-2006, 06:00 PM   #2
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Car: red one
Engine: on the floor
Transmission: next to engine
Axle/Gears: the ones that turn

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Pull some codes, if the MAP is bad it should have something stored.

Where dose your motor idle in drive, if to low, that will make it die.
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Old 05-20-2006, 06:23 PM   #3
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Car: 1988 Corvette
Engine: 5.7L TPI L98
Transmission: 700R4
Axle/Gears: D36 2:59

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Might need to replace or clean IAC motor and passageway.
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Old 05-20-2006, 06:23 PM
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1992 Camaro




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