I have a 1998 1.9 tdi 90HP diesel sometimes it goes flat as though turbo isnt working? have changed air mass meter! no difference? it doesnt happen all the time. If and when this happens as soon as you turn the ignition off and on again the acceleration is there again?
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Re: 1998 1.9 tdi loss of power
Code read the ecu sound like turbo problem they are a variable vain type turbo and the vains stick try putting a good fuel system cleaner through it it may take several goes but its cheaper than a turbo,if you code read it it will most probably come up with-boost control pressur difference------millers or forte fuel treatment are the best i have tried ....let me know how you get on....firstname.lastname@example.org
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I had a similar issue to this after I got in a VERY small fender bender (literally) in an 87 Turbo Supra. In my case, my pasenger fender got pushed in JUST enough to crack a charge pipe and cause a boost leak.
Basically, what was happening was the turbo would spool and build boost, the mass fair flow sensor would read all this air coming in and tell the ECU to dial up the the appropriate amount of fuel. When the air reached the cracks in the charge pipe, it would escape out of them. Thus there was a much lower air-to-fuel ratio, causing less fuel to combust, which lead to power loss and black smoke out of the exhaust.
My guess is either an oxygen sensor, or more likely a boost leak.
i am having the smae problem with my vw polo tdi apart from its like my turbo cuts out completly and the car will not rev over 3000 at all. there is know lights on in the dash but if its dry weather the car is fine. not to handy when u live in scotland HAHA
how many miles has it done?is it remapped? we have had the same problem and done the same repair as above and the next stage for us is to remove the turbo and strip it down and clean the veins inside the turbo as these can stick and give a loss of power,this is on a 2002 gti tdi pd with +-130000miles and its remapped.my car is gt tdi 130bhp stock 140000miles no faults
i also have done a diagnostic test and it states a turbo overboost condition and it drives fine locally but loses power on the motorway and struggles to reach 80mph? any suggestions please email me at email@example.com
I have a 1999 VW golf tdi with intermittent loss of power. The turbo will cut in for a few seconds, then die forcing you to change gear and get a small boost again. The turbo will not boost much past 2200 rpm. The cars computer has been plugged in at the garage and does not show any problems. Various people have said, replace turbo, air mass meter or just simply wash turbo filters in WD40. Can anyone help?