Rough idle and won't stay running

Asked by 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

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.

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.

Your Answer:

C/K 3500

Looking for a Used C/K 3500 in your area?

CarGurus has 1 nationwide C/K 3500 listings and the tools to find you a great deal.

Postal Code:

Chevrolet C/K 3500 Experts

  • #1
    cooldad47
    Reputation
    200
  • #2
    tennisshoes
    Reputation
    130
  • #3
    Dieselman1990
    Reputation
    110
View All

Related Models For Sale

Used Chevrolet Silverado 2500HD
15 Great Deals out of 1,400 listings starting at $6,895
Used Dodge Ram 3500
3 Great Deals out of 50 listings starting at $9,900
Used Ford F-350 Super Duty
15 Great Deals out of 1,199 listings starting at $5,900
Used GMC Sierra 3500
9 listings starting at $9,990
Used Chevrolet Silverado 1500
75 Great Deals out of 9,025 listings starting at $3,995
Used Ford F-250 Super Duty
20 Great Deals out of 867 listings starting at $4,900
Used Dodge Ram 2500
82 listings starting at $3,500

Used Cars for Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.