moosestang

fuse 47 does a lot.

http://www.allfordmustangs.com/forum...fuse-47-a.html

Fahad_H

no codes at all.

#47 is for o2 sensors, cam sensors, A/C, plus other things.

I think the next step is to change the cam sensor?

Fahad_H

I hope only the cam sensor is bad.

moosestang

So did you reinstall fuse 47 and then unplug the passenger side cam sensor? It accelerated normally after that?

I'm surprised that the car didn't set a code after unplugging the cam sensor. The cam sensors are pretty cheap, so replacing it won't cost you much.

I'm still suspecting the alternator leaking ac current (ripple), which is throwing off your cam sensor. Unplugging it may cause it to default to a set table and temporarily cure your problem. I wish I knew what the computer does when it doesn't get the signal from the cam sensor.

Fahad_H

we reinstalled the fuse, then unplugged driver side cam sensor, car drove badly.
The plugged driver side, and unplugged passenger side cam sensor, car drove perfectly fine.

we let the car idle for a while.

hope replacing the sensor solves it. We are going to the drag this Monday.

thanks

Fahad_H

* UPDATE *

we put new cam sensors, but it didn't solve the problem.

car doesn't drive well with new passenger cam sensor plugged.
but runs very well with passenger cam sensor unplugged.

Simon1

I would trace the pigtail going to the fuse box and also inspect the Pigtail and connection.

You should be working with a tuner that knows S197s.

moosestang

I was afraid of that. This is very odd and I'm tempted to go out and unplug my passenger side sensor just to see if mine will run fine without it. I'm betting it won't.

Fahad_H

all is fine

someone on another forum thinks it kills the VTC.

moosestang

Well it would seem that you have misfires with the sensor plugged in, but don't with it unplugged. I don't know enough about the Variable cam timing to know why it would act that way.