Question about Chevrolet Express

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Mechanical I have a 99 chevy express 1500 van my problem is I will be driving along and it will lose power and you cant give it gas it starts popping like it would be popping thru a carb and after let sitting for a couple of hours it will start up and be fine until the next time some times it takes longer than a couple of hours. I have been towed in 3 times and it will start up and be ok after it is off the tow truck I have had a cam positioning sensor put on crank sensor egr valve 2 times poured gas in tank as to try to cool down the fuel pump down in case it was over heating banged on the bottom of the gas tank with rubber mallet please help I am at my wits end thank you

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  • Chevrolet Master
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Any chance the check engine light is on ?
My first thoughts are fuel pump, ignition module or coil. It may be tough to find if you can't duplicate the problem in a repair shop. Someone may have to take tools and equipment on the drive and troubleshoot it when it happens.
When it happens, will it sit and idle or does it shut down ?

Posted on Jul 27, 2013

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6ya6ya
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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: 98 Grand Caravan 3.3 engine starting / running problems

A bad earth connection point on my New Zealand model Chrysler Voyager LE (same car as yours but right hand drive) caused similar problems, including the towing thing. My dealer told me that they would be busy for 3 weeks - dealer talk for "we would prefer to sell you a new one".

A bunch of black wires connect to a chassis ground bolt on my model on the right hand side wall, under dashboard height. I was "lucky" to have the fault present when investigating it, and testing I did afterwards proved this to be a definite cause. You have to remove some covers and pull the floor carpet away This may be on the left on your model. A plug in connector is used, to bring multiple wires together at this point. All I had to do was undo the nut and clean the metal of the bolt and earth lug - use a file or sandpaper, and maybe spray on some WD40 or CRC to impove conductivity. I added an extra washer to help the metal to metal bond also.This seems to have fixed the problem. It has been OK now for about 1000 miles. Good luck !

Posted on Jun 15, 2008

  • 366 Answers

SOURCE: 1998 chevy K1500 timing runs ok for 10 miles then loses all pwr

1-timing on truck is ajusted by ecm,when u moved it u cause cam sensor code because it detected timing was off! 2-o2 sensors has the role of detecting air to fuel ratio coming out of exhaust,sends signal to ecm wich collects data from other sensors from that sets timing for best performance,if ecm detects something wrong in system data it will give engine code,that code will point at problem area,in your case o2 sensors probably detected lean fuel ratio that points to fuel system,blocked fuel filter or fuel pump faillure,elect,circuit damage,hope it helped!

Posted on May 02, 2009

beauman
  • 60 Answers

SOURCE: 2002 Mitsubishi Lancer

have you tried swapping out the front engine ecu?

Posted on Jan 04, 2010

  • 100 Answers

SOURCE: 94 Chevy 1500 truck, seems to be getting fuel,

These sometimes have problems with the magnet on the distributor shaft loosing magnetism. This causes the pickup coil not to be able to produce a strong enough signal for the ignition module and the engine dies because of no spark.

Posted on Apr 11, 2010

cooter_01
  • 43 Answers

SOURCE: 2002 Chevy Express 2500, 5.0. Cranks but won't

FUEL PRESSURE MUST BE 62 LBS. OR GREATER OR IT WILL NOT GROUND INJECTORS, IF ITS OK THEN CHECK YOUR GRAY 12V SUPPLY TO PUMP AT CRANK-UP, YOU MAY HAVE A POOR IGNITION SWITCH.

Posted on Nov 26, 2010

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I wouldn't give up on it, but I would sure be P.O.ed at the mechanic- $700 for a bad diagnosis. Why would he think 3 injectors were leaking? Was it running rich? Did he do a scan for trouble codes? Did he check fuel pressure?
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