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Truck hesitates or backfires when accelerating

Truck backfires when accelerating

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  • Chevrolet Master
  • 2,101 Answers

What is the make and model

Posted on Jan 01, 2013

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6ya6ya
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Posted on Jan 02, 2017

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redds55
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SOURCE: truck idles rough, hesitates when accelerating

Check your fuel pressure it sounds like you might have a weak fuel pump or dirty or clogged fuel filter.

Posted on Oct 29, 2011

diths_kri
  • 67 Answers

SOURCE: 1986 chevrolet silverado truck engine hesitates when accelarating

Along with the vacuume leaks I would check the carb. The accelerator pump might be out of adjustment or something else in the carb. Currently I have the same problem with mine and I just adjusted it and for 1 day so far it's ran fine but I have a holley on mine. Carb may be dirty also.

Posted on Jan 07, 2009

  • 109 Answers

SOURCE: Missing and backfiring during acceleration and climbing hills.

Could be vapor lock in the fuel system. Next time it does this, stop and try removing the fuel filler cap... Hope this helps...;-)

Posted on Apr 14, 2009

  • 1565 Answers

SOURCE: Hesitates accelerating. Backfires when starting,

TSB 91813 APR 91 Engine - Rough Idle/Hesitation/Backfire/Stalling

Posted on Nov 04, 2010

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98 taurus car is hesitating on take off and poor idle . sometimes slight small backfire


The first thing you need done is to have the electronic engine control computer checked for fault codes.

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Acceleration backfiring and jerking hesitation


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My truck hesitates at times when accelerating and backfires at others


wha is the make and model and year? please. how many miles on it?

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Hesitation and backfiring when accelerating


there will be codes stored so the scanner in use has not got the right protocols to read the ECM
Nissan products have to be set using a screw in the ECM to get to read the codes
you have to be specific with make , model , year , type of equipment to get closer

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Hesitating on acceleration, also backfiring when taking your foot off the accelerator,approaching a junction.sometimes it will just cut out. if i turn the ignition off and restart it will be ok for about a...


Sounds like a vacuum leak in the motor. Backfiring may be its own problem altogether. Backfiring only occurs when cold air is being introduced into a hot exhaust stream or when the timing is off. Check for vacuum leaks under the hood and leaks in your exhaust. If you have a leak in your exhaust it could be interfearing with your emission sensors and giving your motor false information.

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1 Answer

Hesitation at 40mph and 50 mph.


A pop and hesitation is likely a backfire. The hesitation around 40 and 50 would be in keeping with that theory. There are several reasons you might be getting backfires and hesitation. If your ECM is adjusting the engine to run too rich this could happen. Misfiring might be occuring. Timing could be out. But one of the most likely is a restricted exhaust, likely due to a plugged, damaged or worn out catalytic converter. In some cases the converter may be bad enough to be giving you some performance problems, but not yet quite bad enough to signal an error. A vacuum test can help confirm whether this is exhaust related.

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sounds like you have jumped a tooth on the timing if not timing out

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Hesitation in my Engine ~ Damsil in Distress!


sounds like a choke sticking or carburetor needing attention..(adjusting or rebuilding) hard to say more without hearing it my own self.....hit me up if i can help more milespeed@gmail.com

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