ajmac212

i have an 04 lancer oz rally, i noticed i was having idle problems and it threw codes for the MAF, so i bought a new one of those a new battery and a new alternator. after i replaced all of those, my car still cuts off whenever im driving and i start to slow down or come to a stoplight. i checked the IAC's and they seem to be in working order....right now its not throwing any codes, but still continues to do this. any help would be great at this point and very much appreciated. im new to the whole import cars, however i know my way around old American muscle cars. please help.

Automatic 51

iTrader: (2)

Do all the lights and electronics turn off as well or do the lights and whatnot stay on?
Does the engine quit all the sudden or sputter out?
Is it random or only when the car is up to temp or only when its hot outside or after its been driven for a while?

Its not that different from a muscle car, it still needs air, fuel and spark to run. One of those things isn't happening proplerly. Its the cause of it that can get complicated.

ajmac212

It just cuts off, idle dies down and then shuts off, the electronics stay on, but the engine just cuts off, I'll turn the key off and restart and she starts right up. I was think it it the crankshaft position sensor, sound bout right?

ajmac212

It's completely random, she will do it once every so often and then she will do it constantly. I call it she cuz she acts like a woman trying to get ready to go out, can't make up her mind what she wants to do. Lol

Automatic 51

iTrader: (2)

Any check engine lights? Cam position or crank position would make sense. I would think if it were a fuel pump issue it would sputter a bit.

BlueGoat

Yeah that sounds like a crank sensor. I'm in the middle of doing one myself if you need help or pics I'll be glad to help you out. Only other thing that comes to mind is the check ground wires make sure nothing is corroded sometimes this can be cause issues I had the same problem with a Sentra I owned and it was ground wire on starter. Check Ignition as while your at it. Hope this helps

rickb928

This is whak, I know, but also check vac lines to and from the evap canister. A leaky canister can inject air into the system and cause idle to fail. Some ECUs trigger a purge at idle, like coming to a stop, to dump vapor and this can cause the mix to lean out. Saabs do this, and when the ECU sees the stumble, it kills the engine.

eusgen

iTrader: (5)

When I had a bad cam position sensor I had the same exact problem.