Close
Car Questions
RepairPal is your advocate for car care advice and guidance

Backfire noise under hood

(1997 Dodge Ram 1500)
in Portsmouth, VA on July 21, 2009
whenever i excellerate i get a backfire noise coming from under the hood and when i get over 55 mph it starts jerking
Displaying 1 answers & 0 comments
Popular Answer
Backfiring under the hood is a sign of a lean condition, either a vacuum leak, air induction boot not secured to the intake manifold ect..., a fuel injector that is clogged and isn't supplying sufficient fuel, insufficient fuel delivery. A burned intake valve can also cause back firing. Back firing in the exhaust is raw fuel injected into the engine but not burned, it burns then in the hot exhaust. Jerking can be due to insufficient fuel delivery or failing ignition. To hard to guess or speculate without being able to drive the car first hand to get an impression of what is happening or being able to do some tests. Has the Service Engine Soon/Check Engine Light come on ? If so a scantool will certainly quickly narrow down the diagnostic troubleshooting time needed to figure out what is going on.
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I put key in ignition, heard noise like gunfire, took key out. Popped hood, saw broken cover, small fire. Fire quickl...
had the leak. then one point started the car and a loud pop from under the hood occurred resulting in a loud knocking...
Didn't find what you were looking for?