Question about 2004 Mitsubishi Endeavor
Started with Car stumble @ 30-40 MPD and the following codes: P0431 Cat eff on Bank 2 P0421 Cat Eff on Bank 1 P0302 Misfire Cylinder #2 Inspection found oil was in the tubes so replaced the valve cover and tube gaskets. Continued, tracked the misfire down to a faulty Direct Ignition Coil. Moved it to Cyl #4, problem followed, moved it again to Cyl #6, problem followed. Replaced the DIC, P0302 code cleared. Car still stumbles. I have a pending P0300 Random misfire code but nothing else. Need some help.
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Posted on Jan 02, 2017
SOURCE: CHECK ENGINE LIGHT CAME ON
What year is your car and what engine? That makes a lot of difference. What the pulses should indicate is a code 12 is stored (code 55 is usually an "all clear" code, meaning that the ECU is done reading out the codes that are stored). If you got only a 55, it would mean you have no codes. 1255 means that 12 is the only code you have stored.
Posted on Aug 29, 2008
what do you mean with 'bad valve cover' ?I asume it is leaking oil.it means that the rubber seal is not sealing anymore,it has gone hard.tighten the cover bolts sometimes seals it for a while.to get to the rubber seals the inlet manifold has to be unbolted and moved,a fairly involved procedure but easy to do if you have a manual and standard handtools.The misfiring is likely stray arching of the coils .remove the top plastic cover of the motor andlook when it is very dark [like lightsof in your garage] and look for sparking.If so ,replace sparkplugs or/and leads.[remove inlet manifold also]Tapping lifter,works with oil,try engine oil flush and/or change oil brande.if problem persist replace lifter,lifter undervalve cover
Posted on Jun 08, 2009
code 304 is number 4 cyl,check the plug insulator for white(arch) markings-if you see any markings replace the insulator
Posted on Aug 31, 2009
determine when it misfires, and isolate cylinders. a poormans method is use an infrared temperature gun (one with high range, 700 degrees or more is preferable) and with engine held at rev(say 2500) point at each exhaust port 1 by 1, misfiring holes have colder exhaust than firing holes.
If the misfire is momentary or intermittant, or caused by defective cam or crank sensors, you should see professional help...those problems require more advanced equipment to get the 1st time, unless you dont mind lobbing expensive parts randomly till you get lucky
Posted on Sep 12, 2009
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