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sprinkles08, ASE Certified Technician
Category: Chevy
Satisfied Customers: 22803
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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1990 chevy 3500 7.4 engine motor dies immediately when you

Customer Question

1990 chevy 3500 7.4 engine motor dies immediately when you put in drive after reaching operating temp/ while cold and engine idlying high no problem with dying/ have changed ecm/ iac/ tps/ coolant sensor/ map /gaskets on tb/ fuel pressure remains constant
at 14/lb/ have redone grounds at thermostat housing help
Submitted: 1 year ago.
Category: Chevy
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

If the engine dies immediately then there is a good chance it's a torque converter issue. In the front of the converter there is a disc clutch that is turned on at higher speeds to give a mechanical lock between the engine and trans. If the converter clutches comes on at a stop then it will drag the engine down and kill it with much the same feel as letting out on the clutch with a manual trans while still holding the brake. If this is what you're feeling then the torque converter clutch is turning on. The converter clutch coming on at a stop could be the lockup solenoid, a valve body issue, or the converter itself.