It'll start rev high for a moment and then go back down to idle and won't stay, it'll just die back out. And it has no codes
Won't Stay Running
- Thread starter carter
- Start date
I can push on the throttle and keep it running it just won't idle. But I'll check the isc valve when i get back to the car.
Carter, J.
Carter, J.
No codes, But i found one of the reason's is that there was a piece inside of the isc, and that helped out. But it still has a chopped idle
wiseco7mgt;1340320 said:
The AFM has nothing to do with idle. You could unplug it, and it would still idle fine.
rayall01;1340400 said:
it will stay idling, but it wont idle properly, and will die sometimes. if the AFM is dirty, plug messed up, or that lil stupid gasket in the plug is missing, it could cause the car to die out.
^ On that note (and because I'm bored today) here's a little demonstration of the TCCS in action. Engine was stone cold and every rpm change is me manipulating the throttle. If your car won't do this there's something wrong with it...
http://tinyurl.com/mmsw3n
http://tinyurl.com/mmsw3n
kotu100;1340413 said:
Gotta bust you on that. It had to be something else contributing to it. The TCCS doesn't even use AFM input at idle, IIRC, and you can even drive the car with it malfunctioning or disconnected.
^ Looks close but isn't. They don't reach.
Dub: Yeah, lots of stuff missing
Rayall: The ECU does use the AFM at idle but doesn't for starting.
Dub: Yeah, lots of stuff missing
Rayall: The ECU does use the AFM at idle but doesn't for starting.
jetjock;1340672 said:^ Looks close but isn't. They don't reach.
Dub: Yeah, lots of stuff missing
Rayall: The ECU does use the AFM at idle but doesn't for starting.
How come the car idled in the vid then?
I meant it normally uses it. In the vid it's operating in fail safe mode. When the AFM signal is missing the ECU looks at the status of STA and IDL, combines those with the NE signal, and falls back on two fail safe maps to start and run the engine. Under those conditions the main limitation is no operation over 3K rpm and, in this example, no boost of course. More about fail safe here:
http://www.mkiiitech.com/forum/showthread.php?t=843
Edit: Apologies to Carter for the thread jack. My guess is a faulty ISC system or an induction leak...
http://www.mkiiitech.com/forum/showthread.php?t=843
Edit: Apologies to Carter for the thread jack. My guess is a faulty ISC system or an induction leak...
OK, in the strictest sense, I'm wrong, but overall I'm right about it not being the cause of his issue. His AFM is not the cause of his problem.
Yes, of course. I never said you were wrong. In fact you're right. The vid was mainly directed at those who are always claiming the engine won't start or run with the AFM unplugged. You and I know better. Here's hoping everyone does now...as long as they don't have a 7MGE of course.
jetjock;1340768 said:
I was just admitting my mistake about it not bring used for idle at all. I see that I was wrong about that particular tidbit of info. Not saying anything about your correction. No harm, no foul.