96 Chevy ruff idle - Engine Troubleshooting


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96 Chevy ruff idle

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gentrydale
Novice

Feb 19, 2015, 4:49 PM

Post #1 of 5 (1650 views)

96 Chevy ruff idle	Sign In

96 Chevy 1500, 5.7ltr. So far have replaced distributor cap, spark plugs, wires, O2 sensors before the cat, and rotor. Runs fine until it warms up then ruff idle, heavy fuel smell and check engine starts to blink. Also has heavy oil coating on all plugs on one side of engine.

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Feb 19, 2015, 4:59 PM

Post #2 of 5 (1646 views)

Re: 96 Chevy ruff idle	Sign In

If one side of the engine has black plugs, you probably have a fuel pressure regulator leaking underneath the upper intake manifold or an injector related leak.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

gentrydale
Novice

Feb 19, 2015, 5:10 PM

Post #3 of 5 (1638 views)

Re: 96 Chevy ruff idle	Sign In

Thank you, that's kind of what I was narrowing it down too also. Is there a way to check the fuel pressure regulator and/or injectors to see if it's that with out having to replace them and finding out that's not the problem? Being parts are expensive I don't want to put a lot of money into replacing parts that don't need it.

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Feb 19, 2015, 5:19 PM

Post #4 of 5 (1635 views)

Re: 96 Chevy ruff idle	Sign In

You can kind of get an idea by opening the throttle and having someone cycle the key on and off. If you can smell raw gas in there, something is leaking.

You could also remove the throttle body. Then with an inspection mirror and flash light, you may be able to see it leaking while someone primes the pump by cycling the key.

Sure way is to remove the upper intake. Then plug the fuel pipes back on and pressurize the system. You'll definitely see what is leaking then.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 19, 2015, 5:20 PM)

gentrydale
Novice

Feb 19, 2015, 5:41 PM

Post #5 of 5 (1627 views)

Re: 96 Chevy ruff idle	Sign In

Great thank you. Will let you know what kind of results I get.

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