Misfire Problem
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Joined: Nov 2005
Posts: 245
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RE: Misfire Problem
my truck was the same way. mine was a #8 misfire, went through all the plugs, wires, etc. mine ended up being the injector like the others said. crap builds up in the back of the fuel rail and causes the back ones to clog up usually. i replaced the injector and cleaned out the rail and it runs like a new truck now since everythings replaced now. now i run some cleaner through it every couple of fillups.
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Legend
Joined: May 2005
Posts: 8,663
Likes: 8
From: Central Oklahoma
RE: Misfire Problem
ORIGINAL: pirranah
my truck was the same way. mine was a #8 misfire, went through all the plugs, wires, etc. mine ended up being the injector like the others said. crap builds up in the back of the fuel rail and causes the back ones to clog up usually. i replaced the injector and cleaned out the rail and it runs like a new truck now since everythings replaced now. now i run some cleaner through it every couple of fillups.
my truck was the same way. mine was a #8 misfire, went through all the plugs, wires, etc. mine ended up being the injector like the others said. crap builds up in the back of the fuel rail and causes the back ones to clog up usually. i replaced the injector and cleaned out the rail and it runs like a new truck now since everythings replaced now. now i run some cleaner through it every couple of fillups.
ORIGINAL: steve00ram360
do what someone else suggested by moving the 2 injectors to other locations. I suggest swapping them with 3 & 4.
you mentioned putting new plugs cap & rotor in, have you pulled the plugs since then? yank 5 & 6 and see if they are gas fouled, if not, put them back in and put a timing light on the wires and verify spark. then verify (using a screwdriver or mechanics stethescope) that the injector is actuating. you should be able to hear it pretty easy with the scope.
the one thing that stand out in this thread is the fact that you had the tranny worked on, then a miss-fire after that. it is possible that the flex plate got hammered enough on the tranny install to cause the CPS to loose the signal on those 2 cylinders. they are back to back on the firing order which would mean that the section on the flex plate would cover both cylinders are right next to each other.
I read a long time ago a thread where a guy had a problem, cant remember the details unfortunately, and the problem turned out to be the flex plate. it got hammared in the tranny install and caused some problem with the motor.
HTH and let us know what you find.
do what someone else suggested by moving the 2 injectors to other locations. I suggest swapping them with 3 & 4.
you mentioned putting new plugs cap & rotor in, have you pulled the plugs since then? yank 5 & 6 and see if they are gas fouled, if not, put them back in and put a timing light on the wires and verify spark. then verify (using a screwdriver or mechanics stethescope) that the injector is actuating. you should be able to hear it pretty easy with the scope.
the one thing that stand out in this thread is the fact that you had the tranny worked on, then a miss-fire after that. it is possible that the flex plate got hammered enough on the tranny install to cause the CPS to loose the signal on those 2 cylinders. they are back to back on the firing order which would mean that the section on the flex plate would cover both cylinders are right next to each other.
I read a long time ago a thread where a guy had a problem, cant remember the details unfortunately, and the problem turned out to be the flex plate. it got hammared in the tranny install and caused some problem with the motor.
HTH and let us know what you find.