1999 Dodge Dakota miss and back fire

JESSE4611

MEMBER
1999 DODGE DAKOTA
6 CYL
2WD
MANUAL
127,000 MILES

Hi I have a 99 dodge dakota v6 3.9 5 speed, It will run fine untill it warms up then it miss fires and back fires so bad you cant drive it and I noticed the RPM gage goes all nutty. I have a light but its for the rear O2 sensor and I replaced that and it went away but no diffrence in how it runs? PLEASE some one give me help me one this one. Thanks Jesse

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi Jesse:
If the car is running fine and giving you trouble when it's warm, I question a couple things. First, I would recomend that you check the EGR to make sure it is working properly and it's not plugged with carbon. If it's fine, look for a vacuum leak or an intake problem.

Let me know if this helps, or if you have any other questions.

Joe

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Monday, November 3rd, 2008 AT 8:25 PM

JESSE4611

MEMBER
3 POSTS

Ok Ill do that today I have off thank god. EGR ha well ill check it out and clean it up and ill let you know what happen, So would you know Y the RPM gage goes all nutty when it starts to run bad? Well im going to get to work on that EGR Thanks alot bud I need the help. Jesse

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Tuesday, November 4th, 2008 AT 12:47 PM

JESSE4611

MEMBER
3 POSTS

Well I found out it dont have a EGR? Weird, I let it warm up with out giving it any gas and same thing as soon as it heats up starts to backfire and miss and if you give it the gas it sounds like the 4 of july coming out of my exhaust haha. The hotter it gets the wers it gets to the point it stalls and barely starts, I notice that it starts to drag cylinders and runs on maybe 2 or 3 and when it stalls it misses and starts to runs back wards for a few secs. Im thinking a timing problem? But ones it cools down for a few it starts right up and runs like theres nothing wrong ones it heats up agen same thing? It has a cam sensor and a crank sensor, thinking when they start to heat up they start to malfunction? What do you think? Thanks for your help I need it. Jesse

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Tuesday, November 4th, 2008 AT 3:41 PM