Possible misfire?
#1
Possible misfire?
I recently acquired a '95 5.2 (168k miles on original engine and trans) and at low speeds, it seems as if the engine is misfiring when driving under load -- no CEL. The RPMs jump when I give it throttle and it struggles a bit and it causes the transmission to clunk and jerk, not a grinding sound per-say. Coasting downhill and everything is fine.
This is my first new old vehicle so I am not very mechanically inclined.
This is my first new old vehicle so I am not very mechanically inclined.
#2
#3
#4
Replying back as the problem may have gotten fixed but still has an issue. I replaced the following, oil/filter change, air filter, PCV valve, distributor cap + rotor, spark plugs + wires, PCM reset.
Between 50-65mph under slight load, seems as if the engine just cuts for a second jerks the whole truck. RPMs dip. Under no load (downhill or coasting) does not have this issue. Could this be a fuel pump going bad or clogged filter? I am assuming the worst and saying the fuel pump has never been replaced.
Between 50-65mph under slight load, seems as if the engine just cuts for a second jerks the whole truck. RPMs dip. Under no load (downhill or coasting) does not have this issue. Could this be a fuel pump going bad or clogged filter? I am assuming the worst and saying the fuel pump has never been replaced.
#5
#6
Double check the spark plug wiring layout as per the TSB or the factory service manual. Also check the coil wiring per the TSB.
http://dodgeram.info/tsb/1998/18-48-98/18-48-98-v8.htm has the TSB and the fix notes.
The FSM is downloadable from a link in the FAQ.
RwP
http://dodgeram.info/tsb/1998/18-48-98/18-48-98-v8.htm has the TSB and the fix notes.
The FSM is downloadable from a link in the FAQ.
RwP
#7
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#8
Did not receive any info on this when I bought the truck. I haven't gotten any CELs since ownership.
I'll give this a go. When I replaced the plugs and wires, I made sure to route them somewhat correctly so they don't touch each other, perhaps I missed something.
Will have to check next time I have the truck on a lift. Was saving a flush and new fluid for an early spring project.
Double check the spark plug wiring layout as per the TSB or the factory service manual. Also check the coil wiring per the TSB.
http://dodgeram.info/tsb/1998/18-48-98/18-48-98-v8.htm has the TSB and the fix notes.
The FSM is downloadable from a link in the FAQ.
RwP
http://dodgeram.info/tsb/1998/18-48-98/18-48-98-v8.htm has the TSB and the fix notes.
The FSM is downloadable from a link in the FAQ.
RwP
Will have to check next time I have the truck on a lift. Was saving a flush and new fluid for an early spring project.
#9
Did not receive any info on this when I bought the truck. I haven't gotten any CELs since ownership.
I'll give this a go. When I replaced the plugs and wires, I made sure to route them somewhat correctly so they don't touch each other, perhaps I missed something.
Will have to check next time I have the truck on a lift. Was saving a flush and new fluid for an early spring project.
I'll give this a go. When I replaced the plugs and wires, I made sure to route them somewhat correctly so they don't touch each other, perhaps I missed something.
Will have to check next time I have the truck on a lift. Was saving a flush and new fluid for an early spring project.