Help engine misfire at WOT in cold weather!
#1
Help engine misfire at WOT in cold weather!
Was driving home today in the fog and it was around 2 degrees, i floored it to get past a fiesta when the ses and asc light appeared ...then i was in limp home mode 60mph with 255 horses under the lid was pretty sh#t
Anyway pulled over and checked the code got P0300 Random/multiple cylinder misfire, cleared it and restarted .....everything was ok again then floored it to check then all of a sudden the same happened .
So i drive the remaining 40 miles steady with no probs .
Has anyone else had this? ive never had it before and seems to be happening only in cold/dense weather at WOT.
Will check the plugs,leads,wiring out tomorrow...any ideas would be appriciated.
Cheers,Rick.
Anyway pulled over and checked the code got P0300 Random/multiple cylinder misfire, cleared it and restarted .....everything was ok again then floored it to check then all of a sudden the same happened .
So i drive the remaining 40 miles steady with no probs .
Has anyone else had this? ive never had it before and seems to be happening only in cold/dense weather at WOT.
Will check the plugs,leads,wiring out tomorrow...any ideas would be appriciated.
Cheers,Rick.
#4
Originally Posted by Rickkys'S
Was driving home today in the fog and it was around 2 degrees, i floored it to get past a fiesta when the ses and asc light appeared...
Has anyone else had this? ive never had it before and seems to be happening only in cold/dense weather at WOT.
Has anyone else had this? ive never had it before and seems to be happening only in cold/dense weather at WOT.
Rich
#6
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Originally Posted by Maximusmini
I don't think your Bypass Valve for the supercharger would have caused such things.. You said 2 degrees outside! Thats what the temp was when I broke my Halfshafts in the middle of Wisconsin on my way back to Michigan.
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#8
I would consider checking to see if you have moisture in your fuel tank. Going WOT might introduce just enough water into the system to cause a missfire, where "normal" driving keeps the A/F ratio in a burnable range.
If you garage your car you might end up with a wide temp differential that causes water to condence in your tank. Pour in a can of dry-gas and get a full tank fill up at a quality station and see if that helps.
If you garage your car you might end up with a wide temp differential that causes water to condence in your tank. Pour in a can of dry-gas and get a full tank fill up at a quality station and see if that helps.
#9
#12
#13
Was driving home today in the fog and it was around 2 degrees, i floored it to get past a fiesta when the ses and asc light appeared ...then i was in limp home mode 60mph with 255 horses under the lid was pretty sh#t
Anyway pulled over and checked the code got P0300 Random/multiple cylinder misfire, cleared it and restarted .....everything was ok again then floored it to check then all of a sudden the same happened .
So i drive the remaining 40 miles steady with no probs .
Has anyone else had this? ive never had it before and seems to be happening only in cold/dense weather at WOT.
Will check the plugs,leads,wiring out tomorrow...any ideas would be appriciated.
Cheers,Rick.
Anyway pulled over and checked the code got P0300 Random/multiple cylinder misfire, cleared it and restarted .....everything was ok again then floored it to check then all of a sudden the same happened .
So i drive the remaining 40 miles steady with no probs .
Has anyone else had this? ive never had it before and seems to be happening only in cold/dense weather at WOT.
Will check the plugs,leads,wiring out tomorrow...any ideas would be appriciated.
Cheers,Rick.
#14
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