1988 c 3500 with 350 small block. keeps shutting off after about 30 seconds

Asked by GuruRTGSC Feb 05, 2020 at 02:01 PM about the 1988 Chevrolet C/K 3500

Question type: General

so my truck was running great has a small oil leak but my big problem is it die
after about 30 seconds but starts right back up. runs great but then dies after
30 seconds again i can not figure out why im getting fuel and spark but then it
all just cuts off like shuting the key off,

1 Answer

GuruRV9PK answered 4 years ago

1-Fuel pump in tank has loose wire. 2-replace pump or repair wire. 3-fuel pump relay crapping out, test first. 4-check or replace fuel filter. 5-use high octane fuel and try to use ethanol free fuel. Early model engines hate ethanol plus you'll have betta performance overall especially with Lucas gas treatment with every other tank full of gas

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