Question about Ford Mondeo
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Posted on Jan 02, 2017
I beleive your firing order is 1 3 4 2. 1 and 4 are companion cylinders-meaning the piston is up or down at the same time i.e. compression and exhaust stroke both pistons are up and even on the exhaust stroke the ignition fires in order to burn unburnt fuel/ h ve you checked your trigger. There is a good coil testing tool that is placed over the coil and has a magnetic pickup that allows you to see if the coil is being triggered-just because you have power doesn't mean that you will have spark. I would replace your ignition wires and look at your wiring harness very carefully- if it is very brittle and you see bare wires exposed that is your most likley problem because the trigger is working for 1 and 3 and has the crank senser input for all for spark plugs and the cam senser is used for ignition advance and your fuel injection system. try wiggling your harness and see if your coils start to work. wireharnesses are a major problem on mercedes benz vehicles of that era. I hope I have been helpful
Posted on Jun 18, 2009
I have seen coil packs go bad on several Hyundai Accents, the coils will do exactly what they are supposed to (hence your check with an ohm meter), however, the coils short through the outer casing. Try running the car when it is dark out and spraying the coil packs with water. Listen for clicking and watch for arching from the coils to any metal around them. Look for abnormal detonation marks in the outer casing. My guess is you just need a set of new coils. If the Problem is worse in the rain then you have found your problem. Remember, If your car has been misfiring (as noted by the engine codes you listed), the EGR valve can become clogged and damage can be done to your catalytic converter as unburned fuel detonates inside it (keep an eye out for O2 codes in the future). Also, your new plugs can become fouled, be sure they are clean once you fix the problem. Checking your plugs can also be a useful indication of which cylinder is misbehaving.
Posted on Mar 18, 2009
I have changed a few cylinder heads under warranty for this type of problem. The exhaust valve guides wear, this causes the exhaust valve to seat badly, giving low compression. if one cylinder compresion reading is more than about 50 psi below the others, then this warrants head removal. It is quite a job, due to the fact that the camshft id chain driven. If you are up for it then once the head is removed, poor liquid into the exhaust ports and see if it leaks out through any of the exhaust valves.
Posted on Jul 23, 2009
SOURCE: 2004 Audi A4 misfire
it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps
Posted on Sep 03, 2009
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