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MrDiesel
02-01-2008, 02:46 AM
Hi folks,

I know this question rears it head an awful lot, but I'm still alittle unsure as to which course of action. I have a 1998 TDi 90BHP Passat which is losing power (cutting into limp mode) in 4th and 5th when under load. I have a new MAF fitted and have no fault codes showing. I am about to replace the vacuum hoses at the front of the engine bay near the air filter (red, blue etc) but was wondering is there anything else I should be checking for. I have read alot about the N75 valve in the forum but don't know if thats for the 110BHP with the variable vanes or if the 90BHP has one aswell. I intend to check all round by the intercooler and back up to the turbo. Will this be a vacuum or a boost leak?

Any help and advice would be very much appreciated.

Thanks

Eugheugh
02-01-2008, 11:07 PM
Could be the MAP sensor-costs about £41 from VW and incredibly was cheaper than any of the other motor parts factors when I replaced mine 4 months ago;) .

Crasher
02-01-2008, 11:12 PM
If it was going into limp mode it would store a code.