1996 Suburban 5.7 idles and accelrates rough!


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1996 Suburban 5.7 idles and accelrates rough!

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jlawrence29
New User

Oct 24, 2010, 11:49 AM

Post #1 of 3 (2677 views)

1996 Suburban 5.7 idles and accelrates rough!	Sign In

I have a 1996 Suburban with 292,000 miles; it started running rough last week during idle and acceleration. I thought may be a plug was fouled out? I changed the plugs, but still ran rough! Changed the Dist. cap, rotor and plug wires, still runs rough! When changing the plugs I noticed #2 cylinder plug was dark. All other plugs looked good. Checked compression on #2 and #4, both were good 170#'s. Took it to mechanic yesterday, they checked it out and said all electronics were good and said the next step was to take the intake off and check the Spider fuel injector system? Not for sure if they know exactly what they are doing and not sure what to do? I have had the transmission and rear end, brakes water pump fan, battery, etc all replaced in the last 3-4 years. Is it just too old to invest more money? It was running fine before this. Any help would be much appreciated! Not sure what to do?

(This post was edited by jlawrence29 on Oct 24, 2010, 11:52 AM)

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 24, 2010, 2:30 PM

Post #2 of 3 (2653 views)

Re: 1996 Suburban 5.7 idles and accelrates rough!	Sign In

What stored codes do you have?

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Sidom
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Sidom profile image

Oct 24, 2010, 3:37 PM

Post #3 of 3 (2649 views)

Re: 1996 Suburban 5.7 idles and accelrates rough!	Sign In

The intake doesn't have to be removed to check those. A simple injector balance test & fuel pressure reading would tell them everything they needed to know....

(This post was edited by Sidom on Oct 24, 2010, 3:38 PM)

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