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compleckz
New Member
- Joined
- Aug 6, 2007
- Messages
- 1,328
- Reaction score
- 3
- Points
- 0
- Age
- 38
- Location
- Western Mass
- Vehicle Year
- 97
- Engine Size
- 4.0
- Transmission
- Automatic
so for the past 6 months maybe, the truck on cold start has ran like it was misfiring for like maybe 20 seconds, if i revved it up a bit, it would go away quicker. it never did this again till it sat for over ~8hours.
today on my way home from a friends (700lb wheeler in the bed), it started running rough, stumbling, and i could hear like backfires in the intake when i got on the gas (i have a cowl-snorkel, so it was quite easy to hear)..
i was a mile from home, and when i arrived i unloaded the wheeler, checked over the engine, and couldnt find any apparent problems with the plug wires etc.. (they are 6-12 months old, along with the plugs)..
no CEL or codes, so i took it for a rip up the road and matted it (may not have been smart, but..) i got the CEL on, and got some codes, p0300 which is random cylinder misfire, and p0301 and po304, which are cylinders 1 and 4 misfire.
so does this sound like a coil pack going/gone bad? like i said before it did the same thing on cold start but very briefly, hopefully the sequence of events will enable someone to identify the part that has failed, so i dont go replacing new(ish) wires/plugs.. or unnecessary stuff..
ALSO i swore i got a whiff of sulfur for a second while i was in the bed of the truck, as if it was a cat going bad, but i did have the 4 wheeler running, i've never smelled any sulfur like smells from the wheeler before, but i'm just not sure cuz it was brief.
this is a 97 OHV 4.0, 110k miles. thanks guys!
today on my way home from a friends (700lb wheeler in the bed), it started running rough, stumbling, and i could hear like backfires in the intake when i got on the gas (i have a cowl-snorkel, so it was quite easy to hear)..
i was a mile from home, and when i arrived i unloaded the wheeler, checked over the engine, and couldnt find any apparent problems with the plug wires etc.. (they are 6-12 months old, along with the plugs)..
no CEL or codes, so i took it for a rip up the road and matted it (may not have been smart, but..) i got the CEL on, and got some codes, p0300 which is random cylinder misfire, and p0301 and po304, which are cylinders 1 and 4 misfire.
so does this sound like a coil pack going/gone bad? like i said before it did the same thing on cold start but very briefly, hopefully the sequence of events will enable someone to identify the part that has failed, so i dont go replacing new(ish) wires/plugs.. or unnecessary stuff..
ALSO i swore i got a whiff of sulfur for a second while i was in the bed of the truck, as if it was a cat going bad, but i did have the 4 wheeler running, i've never smelled any sulfur like smells from the wheeler before, but i'm just not sure cuz it was brief.
this is a 97 OHV 4.0, 110k miles. thanks guys!
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