4cyl dakota problem
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Registered User
Joined: Dec 2008
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4cyl dakota problem
my dakota backfires if your givin it alot of gas before shifting to the next gear. its got alooooooooot of miles. 250k on original engine. if you give it more than half throttle it will backfire but below half throttle it wont. can anyone help me?
Veteran
Joined: Jan 2008
Posts: 368
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From: Burleson, TX
Is it backfiring through the carb/TB or the exhaust? Don't know if it will matter, but usually my mechanic says that if pops back through the carb then it is the valves, although we only work on motorcycles, so it may be different. Hope somebody comes up with some ideas for you.
Grand Champion
Joined: Feb 2006
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From: N.Ridgeville, OH
do you let off the gas before you shift?
if the pedal gives you a slight kick, means its coming out of the TB so your valves need adjusted,
if not, its coming out of the exaust. not sure what causes it really, mine does it, louder now with the bigbore TB. its extra fuel that dosnt have a chance to burn in the cylinders so it burns on the way out,
my bet would be...... well, honestly im not sure, i've done just about everything to this truck except timing and its still there. i dont mind it, (maybe im just too abusive.)
could be worn out valve springs at 250k i wouldnt be surprised, mines got 115k but its had a rough life.
if the pedal gives you a slight kick, means its coming out of the TB so your valves need adjusted,
if not, its coming out of the exaust. not sure what causes it really, mine does it, louder now with the bigbore TB. its extra fuel that dosnt have a chance to burn in the cylinders so it burns on the way out,
my bet would be...... well, honestly im not sure, i've done just about everything to this truck except timing and its still there. i dont mind it, (maybe im just too abusive.)
could be worn out valve springs at 250k i wouldnt be surprised, mines got 115k but its had a rough life.
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it back fires thru the throttle body. the engine runs great! no smoke/ taping/ leaking oil or anything. my mpg hasent changed any ether, about 400 mile to a tank, it cost me 25$ to fill all the way up so im not complaning! it doesnt bother me that it does that cause i rarly go over half throttle in it, i would like to figure out what is wrong with it but im not going to touch it till something breaks. it will probley have 300k or more till that happens. when it does i got a 318 with a 5spd waiting for her. all i need is a wireing harness from a 1500 series that is similar to my truck.
Last edited by coreed; Dec 13, 2008 at 09:29 AM.
