Had a check engine light, said it was an O2 Sensor on the diagnostic. The light went away so can't check to see which of the 3 sensors it was. Now my van randomly shakes in idle, 1st and lower 2nd gears. Also when I am soming to a start. It is the worst when the engine is cold. Almost to the point of undrivable. Just changed the oil this weekend and now there is a loud ticking in the motor. When we started the van to circulate the new oil I just happen to walk behind my van and noticed the muffler was shaking and there was a rumbling sound kind of like it was missing but it's not. It almost sounded like it wanted to stall out. I need help! I have a 2004 Mazda MPV
changed the oil and filter. We were going to try to change plugs and wires but wanted to hold off until we knew what we might be dealing with. The top of the engine has to be removed to change plugs. there seems to be so many things at once going on. At one point there was an engine light that the diagnostic test determined to be an O2 sensor. Was told it could wait that it wouldn't cause any engine failure or complications. Month later we go to change it and the engine light disappears. (was there 2 days ago when we did oil change) tried the diagnostic even though the light is gone but nothing came of it. It passed. I think it reset when I changed the battery. The other odd thing I noticed was that the fan will get real loud and then quiet again in a very random way. When I turn the van off the fan will still be going then it will die down, sometimes even turn off completely and then come back on and go back and forth that way for about 5 to 7 minutes. Just lots of funny things have been going on. The van shakes sometimes and then not others. It was almost undrivable this morning when the engine was cold. We even checked both the motor and the trasmission mounts. Now today there is a loud tickiing coming from the engine. HELP!!!
hi and welcome to JA, has anyone checked the oil to see if there is coolant in it from a possible head gasket leak, the only reason i am suggesting this , is beacuse of the mutiple issues your describing, if u get a head gasket leak and coolant flows into the oil , u will geta ticking sound from the engine lifters because it has thined out the oil, there fore not pumping up and retianing the presure the lifters need, aslo u said your fan has been running more than usuall, wich usually means vehicle is runnig warmer than usual. ... here is what i recommend, first check to see if your coolant level is full, is not, have a pressure check dune on coolant system to see if it bleeeds down, if it does you have a coolant leak somewhere, check you oil level, and look at it to see if it looks milky or excesivly thin, if it is, you probabaly have a headgasket leak, wich would explain alot of the trouble u have been having
10 yrs exp. ASE certified, gold certified with all Dodge,Chry ,Jeep, Corporation training