I was kind of concerned about the plugs and wires. After the inital tune up, the first misfire (in 5) was due to a bad wire. It was replaced and ran sweet for about a week. Then cylinder 3 started going bananas and has not stopped. Up until 3 weeks ago, everything was original Mazda parts. Plugs, wires, cap, rotor, all original from 2002 and never one issue. I did not get my old parts back, and now I am regrettng it. Someone else had warned me about crappy aftermarket parts, and if I had my original Mazda plugs and wires, etc, I could test the quality of the replacement parts by throwing the original ones back in and seeing if I still misfire.
So even tho I no longer have an EGR code, that could still be the culprit, but its just not throwing out the code? So if I disconnect it and no misfires, is it safe to assume the whole valve just needs replaced with a brand new shiny one? Now, I have had the valve cleaned. Wouldnt this keep it from getting stuck open due to carbon build up? Cylinder 3 does have a slightly higher compression, 180 vs cylinder 1 & 5 at 150. My mechanic used Run-Rite to decarbonize, so wouldnt this of gotten rid of all that build up and return compression back to normal? What about the cylinder itself? Could the cylinder be bad(i hope not!)Would there be the same "symptoms" if there was a problem with a worn out cylinder or piston rings? I refuse to accept the fact that it could be something needing a new engine. I was told my car was in great condition and mechanicly sound.
One last question right now- how would I know if there was coolant leaking? Smell? Residue somewhere? U guys are great! Thanxxx :)
Friday, September 7th, 2012 AT 5:55 AM