C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1989 TPI stalls while cruising

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Old May 11, 2018 | 09:04 AM
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Default 1989 TPI stalls while cruising

Im working on a 1989 TPI MAF corvette and first thing in the morning it starts up shakes and dies the first time. then starts and runs fine. Through out the day it will stall randomly while driving. Stall as in SHUT OFF not sputter and quit. anyone have any dealings with this? is there a way to check the MAF sensor?
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Old May 11, 2018 | 12:56 PM
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Originally Posted by Anemeth1987
Im working on a 1989 TPI MAF corvette and first thing in the morning it starts up shakes and dies the first time. then starts and runs fine. Through out the day it will stall randomly while driving. Stall as in SHUT OFF not sputter and quit. anyone have any dealings with this? is there a way to check the MAF sensor?
Bad TPS sensor can do that. Have you checked it out? I've seen a bad MAF, but they never killed the car, just made it run awful/sluggish. I had a bad connection on my TPS after swapping ECMs, and it would run for 2 seconds after key on, then die. You could keep it alive by staying on the gas. If you left off, it would die. When the car got warmed up, it would barely idle, and then eventually die. Fixed the connection and it ran good as ever.

So I would suggest checking the TPS, its pretty easy to do, and I can write up a guide if you would like.
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Old May 11, 2018 | 01:26 PM
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In addition to the TPS, check your fuel pressure. It sounds like you may have some issues there. Pump, Filter, Pressure regulator.
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Old May 11, 2018 | 04:44 PM
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Could be your "ignition control module" going bad.. If the car just shuts off like you turned off the key with no spitting or sputtering, but will start right back up again... Then it could be the ICM...WW
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