Maf/map Problems

[kester]

VAGCOM DTCs:

2 Faults Found:

17958 - Charge Pressure: Control Deviation

P1550 - 35-10 - - - Intermittent

17563 - Manifold Abs.Pressure Sensor (G71): Circ. Short to B+

P1155 - 35-00

 

 

Goes into limp mode. When I log the MAF & MAP, the actual values seem a lot higher than the specified at 2500-3500 rpms. I dont know whether to try replacing theses sensors, or whether the problem may be to do with the VNT vanes ... There COULD be vacuum leaks but nothing obvious.

 

Any ideas on what to try next?

 

many thanks

Kester

[kester]

for info, max MAF reading is 1275 ms/str and max MAP is 2570 mBars.

do these seem too high?

 

and its a 1.9tdi 110bhp

[chrispb123456]

The MAP sensor on the MK1 is inside the engine ECU which is behind the instrument panel, it is connected with a small pipe running from the charge pressure hose (by fuel filter) and runs back into the car behind dash and connects to the ECU, check out this pipe.

There is also a small section of pipe inside the ECU that connects to the MAP sensor this has been known to perish also but requires ECU removal and cover removal.

 

Link to a how to http://www.fordgalaxy.org.uk/ford/index.php?/topic/22717-how-to-ecu-removal/page__p__164798#entry164798

[ianyerman]

check fuel temp via vagcom, i cant remember how but this caused problems like this for me,