Question about 1994 Chevrolet Suburban

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Jumping time

Prob started with a tbi backfire seemingly random highway speeds she purrrrs soo i checked the time it was way off,set it properly, unplugged wire neutral ac off. ran ok for bout 10 miles got home and checked time and its off again .....timing chain????

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  • Chevrolet Master
  • 5,252 Answers

Yesss, sure sounds like too much slack or worn sprockets.

Posted on Jul 31, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

daves944
  • 1050 Answers

SOURCE: 95 Silverado backfires thruogh throttlebody

It sounds very likely that it is going lean. Could be a bad Mass airflow sensor or a fuel pump, maybe plugged injectors. The first thing to do if you can get your hands on one, is to put a scan tool on it that reads live data and go up a long steady hill while you are watching the O2 sensor voltage. It should toggle back and forth across .5V, if it remains below .5V while you drive, then you know it's not getting enough fuel. If so, check the fuel pressure to spec. If it is good, then the pump is fine and you're chasing the other two.

Posted on Mar 08, 2009

  • 6982 Answers

SOURCE: vehicle dies

Sounds like a possible fuel pump problem...When they begin to go bad they will overheat and lock up, then work fine for a while and do the same thing again. By changing the filter you lowered the flow resistance and allowed the pump to work a bit easier but still being bad, it did the same thing again. There are other things that can do this as well, but pump is most common.

Posted on May 27, 2009

Molson02536
  • 3854 Answers

SOURCE: 1997 s-10 sames to get vapor lock

Change your fuel filter, it may have gone it's life time and is getting to dirty to let fuel flow properly. Your fuel pump to may be getting weak, if the fuel filter is dirty the pump works harder and heats up and could be over heating the fuel pump relay too. The fuel pump relay i believe is in the glove box behind a panel that say relay, there should be (3) in there and the middle one is the fuel pump's. switch then around after you change the fuel filter and if you get a chance, check your fuel pressure at the shredder valve. Good luck and hope this help's if there is a Auto Zone around you, you can ask to use the fuel pressure gauge to see what fuel pressure you have and they'll have the step by step instructions on how to do it and takes about 5 min to do and will have the fuel filter and step by step to replace that too. Keep me posted, be glad to help.

Posted on Jun 08, 2009

  • 96 Answers

SOURCE: 1996 chevy truck with 350 backfires sometimes. Gas

timing could have jumped, but it sounds like plugs, wires or coil packs to me

Posted on Oct 11, 2009

  • 1 Answer

SOURCE: I have a 1993 1500 chevy truck with the 5.7 tbi my

backfires when giving gas had it worked on now wont change out of high gear

Posted on Feb 10, 2010

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