I have a 1993 Chevrolet S10 blazer, i am facing a problem every morning or whenever i leave it more than 7 8 hours or so, the truck won’t start without putting some starter fluid or fuel in the intake manifold then it will run normally until its left for another set of hours. any idea?

That info isn’t needed if the pump runs and the car starts and runs OK even under high fuel demand.

I think the problem is the fuel pump. The CPFI system requires high fuel pressure to blow open the poppet valves at the fuel injectors. The fuel pressure required is 63 PSI. The couple of seconds the fuel pump runs when the ignition turned to run before starting the engine might not be developing …

[image] shanonia: That info isn’t needed if the pump runs and the car starts and runs OK even under high fuel demand. I disagree . . . it’s a free country I’ve worked on vehicles where the fuel pump would energize every single time But the engine wouldn’t start without a blast of ether Onc…

Maybe I misunderstood but it sounded like he energized the test connector for the pump and the car ran normally.

yes once the car is on it runs perfectly no problem at all not even in idling, even if i turn it off for a few hours it turns back on as if no problem unless its left for over 5 hours or so.

That tells me the anti drain-back valve on the fuel pump is malfunctioning. Tester

i already bought a full fuel pump assembly a few month back just incase. i will try a new relay tomorrow if that doesn’t fix it then in goes the new assembly.

Removing a fuel tank on an S-10 Blazer is actually quite difficult, versus a Silverado of same vintage, and that’s if you’re using a hoist. Can’t imagine how much harder it would be with jack stands . . . Clearly you won’t drop the tank unless it’s nearly empty You’ll have a helper And you have …

yup thats why i was trying to leave that till the end and till the tank is nearly empty thanks for the tips

Engine will crank but won’t start unless you spray starter fluid or fuel in it

Maintenance/Repairs

db4690 December 15, 2019, 8:22pm 26

My money is still on the fuel pump assembly

If that turns out the be the culprit . . . I highly encourage you to be an entire fuel pump and sending unit assembly. Do NOT buy just the pump, and reuse the old sending unit and sock. You might regret that

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Engine will crank but won’t start unless you spray starter fluid or fuel in it

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