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Hard Start On 95 Blazer 4.3

Sierra89

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Sierra89 Enthusiast

Sierra89

Posted
Posted

Hi All,

I'm experiencing a hardstart problem with my blazer, not everytime but its happening more and more often. She cranks for a while then catches and starts. Once she is running she runs excellent, but its just getting hard to start. Any thoughts as to what might be causing this?

Thanks!

slilly Enthusiast

slilly

Posted
Posted

my brother has a 94 blazer and was experiencing the same thing. then one day he filled up with gas and it wouldn't start at all.. it was the fuel pump. its kinda funny because we then had to lower the fuel tank to get the fuel pump out and the new one in.. the fuel tank was full so it was a pain.

that is my first guess.. fuel pump. you might try a battery first or take it to advance auto or autozone if ya have one and let them check your electrical system (starter, alternator, battery, etc.)

it wouldn't hurt (if everything else is ok) to replace the fuel pump that way you don't have the same problem as my bro.

good luck :)

rriddle3 Enthusiast

rriddle3

Posted
Posted

If the electrical system checks out okay, connect a fuel pressure gauge to the shcraeder valve on the fuel supply line at the top rear of the intake manifold. With the key turned on (but not running) the pressure reading should be ~60-65psi. Turn the key off and see if the pressure drops more than 2-5psi. If either of these readings are out of spec then you have either a bad pump or fuel pressure regulator.

Sierra89 Enthusiast

Sierra89

Posted
  • Author
Posted

Thanks guys,

The battery is new and the starter is also new. I was also thinking fuel pump because even when it does start it sounds like it is starved for fuel for the first few seconds that it is running and then everything is fine. Its also getting worse. I'll be checking the fuel pressue asap!

Cheers :thumbs:

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