I have a 2000 dodge grand caravan 3.3 liters. i changed spark plugs. I changed wires, but it is backfiring like crap all the time. What should i do. Please help.:gr_patrio
TomQuick
08-30-2008, 07:47 AM
We'll need some more information if we're going to help you. Is it backfiring out the exhaust, the intake (more of a pop up front than a bang toward the back) or both? Was it doing this BEFORE you changed the plugs and wires? Has it been doing this for a long time, did this happen suddenly, or over time. Is the check engine light on, and if so, what are the codes.
There are a number of things that could cause backfiring, so having some information will likely help the members here to point you in the right direction.
Ccdove
08-30-2008, 10:11 AM
:)
Ccdove
08-30-2008, 10:14 AM
No the engine lights is not on. It just started backfiring a week ago. It was just backfiring a little bit. but when i changed the wires and plugs it started backfiring a lot. I have the wiring correct, but i did let it run out of gas once before it started backfiring. I filled it up and put fuel injector cleaner in, and i pulled a tree log before this happened. If i drive real slow it will not backfire, but when il speed up it starts. I think it's coming from the intake.It sounds like a pop from the front
jksenter
09-01-2008, 05:04 PM
I recently had the same problem. Then I changed the ignition coil. That fixed it. Be sure to put the wires in correct order when reinstalling them on the coil. coil looks like this
________________
| O O O | WIRES GO IN ORDER 3 1 5
| IGNITION COIL |
| O O O | WIRES GO IN ORDER 6 4 2
|_______________|
NOTICE THIS IS NOT STRAIGHT IN ORDER.
ENGINE PLUGS ARE LOCATED
1 3 5 on the back
2 4 6 on the forward side of motor
Follow this and see if it does not fix your backfire problem.
jksenter
StandOnCliff
09-01-2008, 07:49 PM
If that doesn't work check all your cylinders compression with a compression tester. You can rent one from autozone if you don't own one. If you find one cylinder pumping extremely lower then the rest, you have a burnt valve. Unfortunately if this is the case removing the head is the only way to fix it. A coil can also be checked before just replacing it with an ohmmeter. You could also have a failing injector. Putting a screwdriver tip to each one and pressing your ear to the handle can help you locate a bad or fluctuating one.
