Misfire above 4300 rpm's, cel codes - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
 
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post #1 of 3 (permalink) Old 01-24-2011, 11:26 AM Thread Starter
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Misfire above 4300 rpm's, cel codes

so the other day i went to pass a car i was doing about 55mph and i went to pass i hit the passing gear and hit about 4200 rpms and i started hearing my motor do like a poping sound i wasnt gaining any power or speed so i let off n got back in the lane and my check engine light came on...
the motor is a 2001 300m 3.5ho, in my 99 intrepid "it had a 2.7"

codes are the following;
p1684
p0300
p1391
p0432

i do have the intake manifold spacer and ASP crank pulley as well, if it matter...

the car runs and drives great the check engine resets it self the next time i get into the car...

i changed the following;
spark plugs
plug boots
timing belt
w.p.
t. stat
up graded all grounds 4 & 0 gauge
iac

what should i do next????

when i first did the swap i had no problem hitting 6400 rpms without a issue
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post #2 of 3 (permalink) Old 02-24-2011, 03:27 PM
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did you get this figured out? just an idea, doesn't the MTV actuate at about that engine speed?

what are the chances the spacer has a leak thats only noticeable when there's significant vacuum?

Last edited by ksa8907; 02-24-2011 at 03:30 PM.
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post #3 of 3 (permalink) Old 02-27-2011, 06:46 PM
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Is the timing correct.
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