P0300 Random Misfiring and aftermarket camshafts - Mustang Boards
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Old 06-26-2008, 01:27 PM   #1
Default P0300 Random Misfiring and aftermarket camshafts

I posted up a question on this topic over at the corral with no response so far... I thought someone here might have some insight into solving this.

Here's the deal... Ever since the install of aftermarket camshafts (even back on my 4.6) I would get a CEL for random misfires. When it does so, there is no feeling or sounds of a misfire whatsoever. I have been having the same issues now running the Comp 270's on the 5.4 and I have no idea how to address this in the TwEECer. Does anyone have an idea of which value needs to be changed so it does not keep giving me this false-negative? Thanks.
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JScottGT is offline   Reply With Quote
Old 06-26-2008, 02:14 PM   #2
Default .

If your even close to new spark plugs go ahead and put new ones in.... other than that call manufacturer of your cams.
Stephen4036 is offline   Reply With Quote
Old 06-26-2008, 02:17 PM   #3

Already went thru that... new spark plugs, new coils.
Like I said, it is not an actual misfire. The reaction the cams have on the way the engine rotates causes a false-negative. I spoke with a guy that does a lot of tuning and he said this is real common with aftermarket cams. He knows how to disable it with the SCT software, I just need to know if anyone knows what that same value in the TwEECer software is.
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1996, 2000, 2008, 2010, 270, 2v, 46, comp, gt, misfires, missfires, mustang, p0300, po300, problems, random, trouble

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