Just bringing this BTT...

How about if I break it done into smaller problems...

- What will cause the MAP pressure to be too high ?

Cheers
Wayne

 

I can't see that that is possible.
The MAP sensor could be faulty, giving higher readings than std?

Does the ring gear seperate on T-16 turbo flywheels? That could be the cause of your spinning, or the solenoid is faulty.

Faulty MAP sensor will cause rich running, and hence high fuel consumption.
Faulty Cam sensor could be a cause of rough running.
Faulty ECU could deffo cause these problems.
Faulty water temp sensor can cause a cold start problem.

I would suggest finding somebody with a similar car, and borrowing sensors and the ECU one at a time until you find the fault.

 

The dodgy running?? try the suggestions that Grant has.


The starter is a common problem - I'll be compiling a tutorial to fix this, soon!!
(its the clutch drive)

Somebody else had the cold start problem and had to depress the throttle to get it started. Does the throttle continue clicking for a while after turning off the the ignition - it should do for about 2secs normally - anymore than this can point to a faulty ECU. About 70+vat from a breakers near me!!

 

Grant/Dave - thanks for the advice guys.

Dave - yes the stepper does click for a couple of seconds when I turn off the ignition. I compared this with my other 620ti before I sold it and the stepper motors made the same sound on both.

Tried disconnecting the coolant temp sensor with the ignition on today and the stepper motor repositioned so it seems to be working in some way...

My main concern is to sort the mpg problem first (as its costing me lots of £££) and then I'll sort the starter motor.

Anyone know if the MAP sensor can be replaced without changing the ECU? As I thought the sensor was built into the ECU.

Thanks,
Wayne

 

Not that I don't trust them :lol: But, according to Rover the MAP sensor is not replaceable on it's own. You need to have the whole ECU replaced :err:

Is this right?

 

The MAP is part of the ecu - so yes, an exchange ecu is the only way..

The fact the MAP is "slightly high" could well point to a duff MAP sensor, cam timing out, or a blockage in the exhaust system (I've seen blocked cats cause so much backpressure that the MAP value has been way too high!).

Brian.

 

Thanks Brian,

Going to get the cambelt changed within the next few weeks so the timing will be checked then.

I've got a decat pipe sat in my shed at the moment so I guess I could take the cat off and see if that helps.

Have fitted a new coolant temp sensor today but that has made no difference to the starting problem.

Cheers
Wayne

 

Hello to everybody. I am writing you from Greece. I own a ti and i have the same problems, plus that when i use the A/C, it decreases the idle in about 750 to 700 rpm and sometimes engine stops running. Any idea about that???? Please help, i cant find what causes all these.

 

Im running my MAP sensor externally-can be cut off the board in the ECU and soldered up externally-only way to get a replacement MAP is cut one out of another ECU (must be a turbo ECU if its for a Ti)-have found a motorola MAP sensor in farnells but its 2.5 bar-only a 2 bar one is suitable

 

So the hole problem is in MAP sensor? I ve been told that is the cold run sensor. To tell the truth mine also makes some cuts during running on any gear under 2000 rpm. Is it possible to tell me where is the MAP sensor placed?

 

its inside the ECU soldered to the PCB