Originally Posted by Service Enginee
its a re-mapped car ... maybe there is your answer....
Hi, Service Enginee
If it worked perfectly for some 10 moths with the re-map, I should be able to bring it back to that state?
In the last two weeks I have replaced;
Battery 99.95 (Halfords)
Crank Sensor 42.15 (Fiat Salisbury)
Cam sensor 58.82 (Alfa Romeo Basingstoke)
Cam sensor again 52.60 (Bosch service Partner)
Cam belt set 99.50 (Camberley Auto factors)
Cam wheel 32.10 (Alfa Rome Reading)
Fuel filter 17.50 (Camberley Auto factors)
Air cleaner 16.60 (Camberley Auto factors)
Contact cleaner, Brake cleaner, Carb cleaner, you name it 45.00
3 X Diagnostics with Alfa main Dealers 150.00
Error memory is full.
Crank sensor, MAF sensor, Cam sensor, MAP sensor...
Yes, I expected that.
After all I have unplugged, cleaned or replaced almost all of them.
Can I have a print out?
Sorry Sir, the Fiat /Alfa examiner is a hand held unit and printing is not possible.
Can I have a look myself then?
Unfortunately Customers are not allowed into the workshop because of insurance reasons.
So what’s the verdict then?
There is something not right with your car, Sir.
Looking true some of the paper work that came with the car.
According to the last “Cam belt change” Invoice (all Alfa Main Dealer).
They did the valve clearances as well.
It also says;
Cylinder No. 1 and 2, helycoil repair to camshaft carrier.
Sounds to me as;
The Alfa technician has tried to depress the valve bucket (using the camshaft as counter leaver) when cylinder 1 was at OT.
(I done that one before on a Lancia Dedra)
Cam belt was out of timing and he tried to start the engine.
At very low speed, like when cranking with the starter motor;
If the piston hit the valves, it can rip the tread out of the cylinder head that hold the cam carrier down.
This would also explain the bend cam wheel when the camshaft moved upwards hitting the cam sensor carrier???
Where to go from here?
Over boost should be one of 3 things.
VTN blocked = Vacuum all the time, no atmospheric pressure is entering the Vanes adjuster.
The VTN is controlled by the ECU, after calculating two signals, one from the MAF and one from the MAP sensor.
The ECU sends sine wave signals to the VTN, the length and frequency of the signal determents the MIX of vacuum and atmospheric pressure.
If the signal from the MAF or MAP is wrong the timing and frequency of the sine wave is also wrong.
If you watch the turbo actuator rod closely, you will notice a jerky movement.
MAP sensor, it could be that the MAP sensor is reading more boost as there actually is.
The MAF sensor, if the MAF gives wrong readings to the ECU it is impossible to calculate the VTN signal as required.
Or it could be stuck turbo vains, but with a Turbo less than a year old???
It seams to work ok, when the VTN is plugged.
Turbo comes in late (@2200 RPM), but it comes and the engine reves nicely to the red line in 3th and 4th.
The dealers told me that replacing all 3 is around the £550 mark.
If it would need a turbo....???