Question about 1994 Chevrolet Suburban

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My truck has a 5.7 and it runs rough at idle or going down the road put new plugs wires and cap on it and did not help

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

3dmaster
  • 183 Answers

SOURCE: 1996 Chev. 1500 pickup truck, 305 C.I. PO300 code

Than you problem solved by yourself already,

Dear you had done good job for your dream,

just some modification nedds like,

CHECK YOU ENGINE MOUNTINGS,OR THIGHTEN IT,
YOU HAVE TO ALSO CHECK YOUR PLACEMENTS ORDERS OF YOUR ENGINE THAT NOT TO BE CHENGED AFTER YOUT TRY.

THNX

Posted on May 20, 2008

  • 120 Answers

SOURCE: 1998 Chevy 1500 Z71 5 speed random misfires

does it have a coil if so check it

Posted on Feb 18, 2009

  • 1 Answer

SOURCE: 1997 chevy truck running rough

Is this a 5.7? They are notorious for intake manifold gasket leaks. When mine did it, the diagnostics blamed it on an ignition misfire also! Replaced the gaskets and it runs smooth!

Posted on Apr 01, 2009

Molson02536
  • 3854 Answers

SOURCE: 95 Chevy C-1500 runs rough at idle and during accelleration

Check the vacuum line to the fuel pressure regulator and check to see if the fuel pressure regulator has gone bad. Give the throttle body a good cleaning and the injectors too. Do not use carb cleaner, it's to corrosive for the gaskets used in the throttle body. The other thing too that would cause this is a stuck or bad EGR valve, Try cleaning the EGR valve too since your cleaning the throttle body. Good luck and keep me posted.

Posted on Jun 11, 2009

  • 62 Answers

SOURCE: #6 Cylinder Misfire, Rough Idle but smoothes out

you could have a valve stem seal bleeding down when the truck sits causing the blue smoke on start up and if bad enough may be fouling that spark plug with oil I have an 89 k5 blazer with 140k on the clock it does the same thing on cold starts and is a common problem on older hige milage gm v8s. also stick with ac delco plugs.

Posted on Jun 29, 2009

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