Rough idle and won't stay running
40

Asked by Todd May 25, 2018 at 09:06 PM about the 1998 Chevrolet C/K 3500

Question type: Maintenance & Repair

I have a 1998 Chevy 3500 5.7 L vortec.
Today I lost power. Would give it gas and it
would barely go. Trying to die. Almost like no
fuel pressure. But also acting like the
exhaust was clogged. My boss said it was
probably the catylitic converters. So I drilled
them and cleaned them out. Still the same
problem. It will start but won't stay running,
running very rough with giving it gas and
won't get over about 1000 rpm. I think the
problem could be a fuel issue but checked
the valve on the fuel line. Had good pressure
it sees. But I don't have a gauge to check it
with. It had been running rough when it first
started, for about a month, but if I just let it
idle for a couple of minutes it would then
idle fine and run good. But then this
happened today

2 Answers
40

Todd answered 6 years ago

No lights lit up on dash. Plugs, cap, rotor are new about 2 months ago. Also replaced spider injector, about 2 months ago, which had gone out also.

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40

Todd answered 6 years ago

But the plugs and cap and rotor we're replaced before we knew the problem with the spider injector. And was told that the plugs may need changing again because of the constant trying to start it when the injectors were out. I was told they could have fouled out just from that. But I never changed them because it ran fine after the new spider injector was installed.

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