Question about 1994 GMC Sierra
My truck backfires after decelerating on the highway and is missfiring. ive been told it is because the timing and needs a tune up. ive also been told its the fuel pump.
Have the misfire diagnosed and the backfiring will be fixed also. The backfiring is caused by the "over-rich" fuel mixture in the exhaust stream and is igniting within the exhaust. Fix the misfire (which will cause the rich condition) and the backfire will be gone.
Posted on Apr 27, 2014
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Posted on Jan 02, 2017
SOURCE: Truck broke down wont start.
There is no Inercia Switch to reset Like Ford
Have you Double Checked All Underbody wiring for fuel pump ,OPEN In Pink/blk tracer fuel power lead,also
Oil Sending unit on most GM Vehicles have the ability to turn OFF GROUND to Fuel Pump Relay as a Proyection Against LOW OIL Pressure in engine.
Fuel Cutoff Mode
The PCM cuts OFF fuel from the fuel injectors when the following conditions are met in order to protect the powertrain from damage and improve driveability:
Posted on Jan 26, 2009
Try this, remove (MAF) Mas Air Flow sensor,(be sure key is OFF) so you don't set a trouble code when disconecting wire conector, with some throttle body/air intake cleaner from the outlet side of MAF, spray the sensor clean, let dry, reassemble.Remove snorkle from throttle body, and with a old tooth brush, clean throttle body& plate with cleaner, may take a couple of cans if throttle is badly 'coked' up. Hope this helps.
Posted on Feb 01, 2009
my friend the car backfires if its runing lean ( insufficient fuel ) or runing rich ( insufficient oxygen ) this mostly in carbourated cars would make incomplete compustion . in engine with fuel injuction there may be a leak in the intake valve that makes the fuel to burn in the exhaust pipe . so check for leak asap
Posted on May 29, 2009
click the ignition so #1 cylinder is at top dead center then pull youre distributer cap off make sure the rotor is pointing towards # 1 cylinder if not you re timing is 180 deg off pull the distributer out a little and turn the rotor to # 1 cyl you probaly dont have the timing marks lined up correct if the timing is off it will back fire either out the air filter or exhaulst ..
Posted on Nov 13, 2009
Tips for a great answer:
Sep 13, 2015 | Cars & Trucks
Nov 28, 2012 | 1995 Honda Accord
Car not starting
or turning over indicates towards multiple possibilities. It can be issue with
battery or weak battery. But if battery checks out ok, then it can be starter
issue or faulty alternator or problem with low fuel pressure or
no spark at spark plugs due to dirty spark plugs or faulty ignition
coil or injectors getting cracked or dirty and needs to be cleaned.
To confirm the problem,
the basic troubleshooting is required.
Click this link
below and follow the troubleshooting:------
Headlights flickering and car hesitates to start? http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html
Starts fine but dies in few seconds?
Turns over but not start? http://whatisbyme.blogspot.in/2012/05/1989-toyota-pickup-truck-turns-over-but.html
Feels like backfire from engine when decelerating? http://schematicsdiagram.blogspot.in/2012/02/feels-like-backfire-from-engine-when.html
--------- Jeep Backfires? http://technoanswers.blogspot.in/2012/02/jeep-backfires.html
----------- Nissan Pathfinder stalls and bucks on Acceleration?
Nissan Pathfinder Backfires?
Car not starting? http://repairhelpcenter.blogspot.in/2012/02/car-not-starting.html
--------- Engine turns over but will not fire or start? http://technoanswers.blogspot.in/2012/07/engine-turns-over-but-will-not-fire-or.html
---------- Car will not start? http://repairhelpcenter.blogspot.in/2012/02/car-will-not-start.html
These help links will help.
For more help keep updated.Thanks.
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