I have a 2003 montero the check engine light and skid light keep coming on, at the time they come on I experience a loss of power and popping sound in the engine. The engine code are mis fire and each time in a different cylinder. I have had it in the shop twice now and code show a mis fire but in different cylinders each time. So far I have replaced fuel screener before fuel pump, spark plugs, plus wires and the valve cover seals as it was leaking oil on the plugs. But two days after all that work it happens again. Anyideas?
Been going on for about a month now it has 107k miles on it. When codes are read it doesn't show anything for tractions system just the mis fires. But when it happens I will be driving and seems to lose power for 30 seconds to 2 minutes then runs seems to run fine again. Happens at different speeds and usually on a warm engine after driving for 10+ minutes.
I've had it to local shop they are ones that did plugs, wires and valve cover gaskets run me about $700 so far. There isn't an actual Mitsubishi dealer with in 400+ miles so stuck with other dealers or local shops.
I don't know about the scanner I will ask when they are open in the morning.
I've noticed that the rpms drop and can hear a popping (almost like pop corn popping) under the hood, there's also a deep bassy sound at the same time. If I give it gas just seems to not do much then after a minute or two it clears up and power is back.
They did say they checked fuel pressure and it was good so I'll check on if they scan traction
OK I just ran to auto zone because light popped up again and had them read me the code they could. It shows cylinder 6 mis fire, 2-3 too lean and 1-4 too lean. Codes are p0171, p0174, p0306. Does that change anything?
So I also found today a vacuum leak at what I believe is called a throttle actuator, could be wrong on the name. Its a gold round guy that looks like it opens and closes baffle in the intake. Any idea where I can find this part? I've been everywhere in town and no one can find it or even a name for it. My Subaru dealer told me it does come with the complete aluminum intake but that's $850. There's got to be a way to just get the vacuum part it comes off with two screws. Any ideas?
Mine is fuel injected this part is about the size of a chew tobacco can and about an inch thick has a vacuum hose on one end and a rod that moves in/out on other end that connects to I'm guessing a moving baffle inside the intake. the vacuume hose from it runs into the electronic vacuum cylinoid. Its located in the center of plentum intake on front side of engine
Yes its coming from that diaphragm on the front you can hear it hiss outthe bottom side. And of course it stopped if you unhook the vacuum hose. I might try some local junk yard it comes off with two phillips head screws.