1993 GMC Sonoma stalls out hot and hard to restart

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carriedi
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Joined: Wed Apr 10, 2013 12:42 pm

Re: 1993 GMC Sonoma stalls out hot and hard to restart

Unread post by carriedi » Wed May 26, 2021 5:44 pm

is the gas gauge reading correctly?

I would wait until the stalling is happening and have the fuel pressure and flow checked.

fuel pressure for the 4.2L should be 50 - 57 psi
fuel pressure for the 5.3L should be 55 - 62 psi

driving the envoy with a scanner hooked up and graphing the PIDs would probably give you the best picture of what's happening when it acts up

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