misfire under heavy load, Codes P0340 P0335 P0500 P0172
Feb 13, 2014, 08:44 AM
#1
misfire under heavy load, Codes P0340 P0335 P0500 P0172
car was driving great for awhile its a Evo Ix, started to misfire and bog at 3k rpms under heavy load/half throttle, it spits and sputters. I get codes
P0137,P0340,P0335, P0500 and P0172. I know P0137 is rear o2 so im not worried ab out that, but the crank and cam sensor has got my concern. possible boost leaks? or bad sensors?
Anyone else has these issues? ive already done the easy checks of the wires and what not
Easy bolts ons, 3" exhaust, MBC, built trans, stage 3 Non ACD Tcase, weapon R pipes.
ported mani"s, invidia o2 housing. COP home made, with denso coils.
it starts fine, sputs a little at idle takes off in first and second good, 3rd,4th,5th Very poorly under load.
P0137,P0340,P0335, P0500 and P0172. I know P0137 is rear o2 so im not worried ab out that, but the crank and cam sensor has got my concern. possible boost leaks? or bad sensors?
Anyone else has these issues? ive already done the easy checks of the wires and what not
Easy bolts ons, 3" exhaust, MBC, built trans, stage 3 Non ACD Tcase, weapon R pipes.
ported mani"s, invidia o2 housing. COP home made, with denso coils.
it starts fine, sputs a little at idle takes off in first and second good, 3rd,4th,5th Very poorly under load.
Last edited by blowngasket; Feb 13, 2014 at 08:46 AM.
Feb 13, 2014, 09:33 AM
#2
Its sounds like there could be a boost leak. I would definitely start with the basics and boost leak test it.
Especially since certain codes can be set just from a random misfire. Check all your plugs just to make sure the gaps are ok. Start from the beginning and I wouldn't throw any parts at it until you narrow down the issue.
P0340 Mitsubishi - Camshaft Position Sensor Circuit
P0335 Mitsubishi - Crankshaft Position Sensor Circuit
P0500 Mitsubishi - Vehicle Speed Sensor Malfunction
P0172 Mitsubishi - System Too Rich- Cylinders 1-4
Many codes can be set from one system going haywire and many times present a false code that is triggered because something else is wrong.
Its very rare you would get a cam and crank position code at the same time.
Especially since certain codes can be set just from a random misfire. Check all your plugs just to make sure the gaps are ok. Start from the beginning and I wouldn't throw any parts at it until you narrow down the issue.
P0340 Mitsubishi - Camshaft Position Sensor Circuit
P0335 Mitsubishi - Crankshaft Position Sensor Circuit
P0500 Mitsubishi - Vehicle Speed Sensor Malfunction
P0172 Mitsubishi - System Too Rich- Cylinders 1-4
Many codes can be set from one system going haywire and many times present a false code that is triggered because something else is wrong.
Its very rare you would get a cam and crank position code at the same time.
Feb 13, 2014, 09:42 AM
#4
EvoM Community Team Leader
+ 1 on checking spark plugs. Do a boost leak test for sure. Your symptoms while driving match what I experienced when needing new plugs. Thinking a little out of the box...but check your harness over, rodents like to chew on **** and bad things happen. My former boss had a minivan that was throwing all kinds of codes, turns out rats had chewed through his harness at the MAF.
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