Are misfires normal???
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TECH Junkie
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Re: Are misfires normal??? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ChrisB:
<strong>Do you have an aftermarket camshaft, and if so what are the specs?
Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No aftermarket cam here. Just bolt-ons.
<strong>Do you have an aftermarket camshaft, and if so what are the specs?
Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No aftermarket cam here. Just bolt-ons.
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From: Fort Worth
Re: Are misfires normal??? I never got any missfire codes until I put a T-1 cam in.I`ve got an SES light and A-Taped it and it shows no codes.But that was after I ran the car 3 on and off cycles and the light goes away.
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Re: Are misfires normal??? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ChrisB:
<strong>Do they stay around one cylinder in particular, or are they randomly distributed?
Are you still running stock spark-plugs?
Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">When I added headers at around 10,000 miles I added NGK 55's ...gapped to .5'
I now have 20K miles on the car. The misfires are randomly distributed.
<strong>Do they stay around one cylinder in particular, or are they randomly distributed?
Are you still running stock spark-plugs?
Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">When I added headers at around 10,000 miles I added NGK 55's ...gapped to .5'
I now have 20K miles on the car. The misfires are randomly distributed.
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Are misfires normal??? My car is now finally in perfect tune. Perfect Ltrims (never above 0%) and perfect o2's (.88-.89) <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
However, I'm still getting misfires and was wondering if this is normal. I don't get any KR either.
Somehow atap is showing that I'm getting misfires in most of my cylinders!!! How could this be???
All I have are bolt ons for mods, and I'm maybe thinking injectors are bad, but I only have 20K miles on it. I am running 62psi fuel pressure which may add some load to the injectors. I dunno.
Any suggestions???
<small>[ April 11, 2002, 06:41 PM: Message edited by: verbs ]</small>
However, I'm still getting misfires and was wondering if this is normal. I don't get any KR either.
Somehow atap is showing that I'm getting misfires in most of my cylinders!!! How could this be???
All I have are bolt ons for mods, and I'm maybe thinking injectors are bad, but I only have 20K miles on it. I am running 62psi fuel pressure which may add some load to the injectors. I dunno.
Any suggestions???
<small>[ April 11, 2002, 06:41 PM: Message edited by: verbs ]</small>
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Re: Are misfires normal??? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ragtop 99:
<strong>do you get a lot or a little? Can you feel shake in the car at idle?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Hell yeah I feel the car shake at idle....between my headers, true dual exhaust, no cats, and the exhaust dumping before the rear axle I get a decent amount of shaking....
I don't get a ton of misfires, at idle when I look at ATAP using the cylinder misfire history for each cylinder, I get up to 5 misfires in some of the cylinders in a minutes time or so...
the other wierd thing is when I'm recording atap runs, I have a category for total misfires. When I start recording, that number right off the bat will start at 8 or 12 or something high.
But as atap is logging more data while I'm driving, that total misfire number drops in 2's....to 6, then 4, then 2, etc...
<small>[ April 12, 2002, 12:42 PM: Message edited by: verbs ]</small>
<strong>do you get a lot or a little? Can you feel shake in the car at idle?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Hell yeah I feel the car shake at idle....between my headers, true dual exhaust, no cats, and the exhaust dumping before the rear axle I get a decent amount of shaking....
I don't get a ton of misfires, at idle when I look at ATAP using the cylinder misfire history for each cylinder, I get up to 5 misfires in some of the cylinders in a minutes time or so...
the other wierd thing is when I'm recording atap runs, I have a category for total misfires. When I start recording, that number right off the bat will start at 8 or 12 or something high.
But as atap is logging more data while I'm driving, that total misfire number drops in 2's....to 6, then 4, then 2, etc...
<small>[ April 12, 2002, 12:42 PM: Message edited by: verbs ]</small>
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From: Clarkston
Re: Are misfires normal??? We're talking about the mis-fire current for each cyl, right?
This parameter records the number of "misses" out of the last 200. Anywhere up to 10-12 is very normal in my opinion. Try sorting your data by PRM and deleting anything below 1K rpm. What does it look like in other RPM ranges?
Mark
This parameter records the number of "misses" out of the last 200. Anywhere up to 10-12 is very normal in my opinion. Try sorting your data by PRM and deleting anything below 1K rpm. What does it look like in other RPM ranges?
Mark
