My 2002 Dodge Ram has a persistant miss.
#1
My 2002 Dodge Ram has a persistant miss.
My 2002 Dodge Ram has a persistent miss. It has the 4.7 4x4. Over the last few years I have constantly been fighting it. About 1 1/2 years ago I put in all new plugs and coil packs. I have since replace 3 of the coil packs.
Whenever I replace something the truck runs good for a while and then the miss comes back. The codes will say something like Miss Cyl 8 and Intermittent miss Cyl 4. Now the engine has started idling fast and the transmission changes frequently when it shouldn't.
Yesterday I changed the transmission fluid. The transmission man suggested the problem could be the throttle control.
I am serching for ideas to get this great vehicle back as it should be.
Any ideas?
Thanks
Whenever I replace something the truck runs good for a while and then the miss comes back. The codes will say something like Miss Cyl 8 and Intermittent miss Cyl 4. Now the engine has started idling fast and the transmission changes frequently when it shouldn't.
Yesterday I changed the transmission fluid. The transmission man suggested the problem could be the throttle control.
I am serching for ideas to get this great vehicle back as it should be.
Any ideas?
Thanks
#2
#3
I am loosing some water. The code's always refer back to a cylinder missing. I tried the ignition switch test I read about on here, and I am not getting a code.
#4
O2 sensors and bench flow/clean Injectors.. o2 will trim fuel, but can only adjust pulse on a bank.. not individual Injectors.. if one or more is clogged up or not flowing right, you could be leaning out the corresponding cylinder, or the opposite; fattening the trim..
Either way, based on age alone (if they are oe), those o2s need swapping..
Edited to add: inspect each plug.. they will tell the true story of each cylinders health.. a leak down might not be a bad idea either.
Either way, based on age alone (if they are oe), those o2s need swapping..
Edited to add: inspect each plug.. they will tell the true story of each cylinders health.. a leak down might not be a bad idea either.
Last edited by drewactual; 09-20-2012 at 01:51 PM.
#6
dont waste your money anywhere else. You have a blown head or head gasket.
I just spent over 5 months and hunderds of dollars on trying to fix my CEL for Random Misfire, Cylinder 4 misfire, Lean Bank1, and a couple more. You are losing water to the inside of the block, its burning with the air fuel mixture and creating a lean/miss for the cylinder.
Go have a compression test done before you buy any other part. That will tell you right off the bat the same thing i just told you.
I just spent over 5 months and hunderds of dollars on trying to fix my CEL for Random Misfire, Cylinder 4 misfire, Lean Bank1, and a couple more. You are losing water to the inside of the block, its burning with the air fuel mixture and creating a lean/miss for the cylinder.
Go have a compression test done before you buy any other part. That will tell you right off the bat the same thing i just told you.
#7
I was losing a antifreeze for years and tried everything to figure it out except to check for a bad head gasket or head. was running great for years with only a loss of coolant every week. there was never a sign other than that pointing to heads until I got the misfiring from cylinder 5 this year. changed plugs, coils and two weeks later it came back. my heads were warp so definatly look into compression test first.
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#8