Low RPM misfire
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Launching!
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From: Hurlburt Field, FL
Low RPM misfire Hey all.. i tried using the search function but it kept just sending me to google???
I have a misfire below ~1500 rpm, everywhere else its fine, even at HIGH RPM. at first i thought it was an off idle stumble, but it does it in every gear it i have it at that low of an rpm. Cruising at 60ish mph in 6th gear is apprx 1400 rpm (3.42 gears) and it will have the SES light flashing all the time, if i give it any extra throttle it feels like several cylinders are misfiring.
any ideas?
i'm thinking new coils/wires... as they are both stock.
I have a misfire below ~1500 rpm, everywhere else its fine, even at HIGH RPM. at first i thought it was an off idle stumble, but it does it in every gear it i have it at that low of an rpm. Cruising at 60ish mph in 6th gear is apprx 1400 rpm (3.42 gears) and it will have the SES light flashing all the time, if i give it any extra throttle it feels like several cylinders are misfiring.
any ideas?
i'm thinking new coils/wires... as they are both stock.
Thread Starter
Launching!
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From: Hurlburt Field, FL
i'm putting new wires on it tomorrow or wednesday, then will check plugs... if its still an issue i will start changin coils.
oh yea.. the code says random multiple cylinder misfire
oh yea.. the code says random multiple cylinder misfire
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Thread Starter
Launching!
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From: Hurlburt Field, FL
Originally Posted by LightFighter
prolly the wires I bet you messed them up when you changed the plugs,
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check the ohms of the wires, should be around 300 to 500 ohm range.
the wires should click twice on the coils and just once on the plugs, but I am sure you know that already.
check the plug tips make sure they are tight, sometimes the tips that screw on get lose and might cause something like that.
also disconnect your coil pack connectors and reconnect them to make sure everything is seated and tight.
the wires should click twice on the coils and just once on the plugs, but I am sure you know that already.
check the plug tips make sure they are tight, sometimes the tips that screw on get lose and might cause something like that.
also disconnect your coil pack connectors and reconnect them to make sure everything is seated and tight.
On The Tree
Joined: Jan 2007
Posts: 177
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From: Portsmouth, VA
I just had the same problem yesterday and i have 2 month old tr55's. I pulled them and they appear to be fouled, so i am saving them to get a better look at them. I put in new plugs and the problem is gone. I have new msd coils and msd wires.
Been there. Change the plugs & wires. I prefer NGK TR 55 & MSD. My problem ended up being bad coils. It looks like the enectrical connections got fouled up from my spraying the engine off @ the car wash.
Best thing is to find a friend with similar car, and switch one side of the coil packs at a time, clearing all codes after & seing if that works.
Could also be a bad 02 sensor. When it flashes on & off, that indicates a misfire. So def one of the above listed items. Good luck.
Best thing is to find a friend with similar car, and switch one side of the coil packs at a time, clearing all codes after & seing if that works.
Could also be a bad 02 sensor. When it flashes on & off, that indicates a misfire. So def one of the above listed items. Good luck.
I have the SAME exact problem going on...I have a post on here somewhere.
https://ls1tech.com/forums/generation-iii-external-engine/710372-i-m-lost-what-causes-these-codes-please-help-me.html
https://ls1tech.com/forums/generation-iii-external-engine/710372-i-m-lost-what-causes-these-codes-please-help-me.html
Thread Starter
Launching!
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From: Hurlburt Field, FL
02 sensors are brand new, tuner said they are fine (they have less than 200 miles on them)
this WHOLE setup has less 500 miles on it (heads/cam/headers/lsx9090/plugs)
puttin msd wires on it tonight, see what happens.
this WHOLE setup has less 500 miles on it (heads/cam/headers/lsx9090/plugs)
puttin msd wires on it tonight, see what happens.
Originally Posted by Black Sunshine/ 00SS
Been there. Change the plugs & wires. I prefer NGK TR 55 & MSD. My problem ended up being bad coils. It looks like the enectrical connections got fouled up from my spraying the engine off @ the car wash.
Best thing is to find a friend with similar car, and switch one side of the coil packs at a time, clearing all codes after & seing if that works.
Could also be a bad 02 sensor. When it flashes on & off, that indicates a misfire. So def one of the above listed items. Good luck.
Best thing is to find a friend with similar car, and switch one side of the coil packs at a time, clearing all codes after & seing if that works.
Could also be a bad 02 sensor. When it flashes on & off, that indicates a misfire. So def one of the above listed items. Good luck.
