Power Loss

[gravesyt]

Hi all got my caravan out of storage yesterday driving great 1, 2, 3, 4 loads of power smooth take away turbo seemed to be working great hit the dual carriage way 45 mph in 4  shifts in to 5 nothing struggled to get to 60 mph .with foot to the floor  lucky for me I had my laptop with vag on it so when it got home I didn't turn the engine off plugged vag in  to see the error code Nothing at all check for holes in pipe work that I could see nothing  so took the gal solo for a blast and I mean a blast at 70 ish she still wants to go and can feel it pushing me back in the seat , is it the actuator . n75 valve   the van weighs 1154 kg so 69% weight ratio so not to heavy  god help me if I hit a hill :( got to get this sored fast away next wk  or dog house for the rest of the year all privileges stopped :angry:

[chromedome]

Sticking brakes on the caravan?

[seatkid]

Sounds like classic MAF sensor early symptoms of failure.

[gravesyt]

sorry all for the delay in getting back work commitment . Maf was change last year and the caravan brakes are ok. when I was in 5 th gear foot to the floor it was as it wasn't there coming up the gears absolute great  in 4th I could of quite easy have got to 60 with out red lining

[BrianH]

what MAF did you change it for (Make/Brand?) and where from? New or used?

[gravesyt]

original bosch 1 428 448 from ford  ford ( discount 51 % )  the Gal is 1.9 tdi  110

[seatkid]

Possibly sticky turbo vane mechaniam/actuator - quite common fault - needs cleaning. Search forum for forum for more information and remedies.

[gravesyt]

Thanks Seatkid I am also looking at changing the MAF the last one I replaced was it with was a different part number but a direct replacement ( newer version) say fords but WV can get me the original one . or could it be the n75 valve on its way out whilst its under pressure from towing she is getting on a bit but drive as she should also thinks of getting Turbo service as I think she's worth it just got to look at costs 

[xavier]

There's a guy in Glasgow that does turbo refurbs. If you can get someone to remove your turbo you can courier it to them and then they check it over and clean it up, posting it back to get refitted. Not used them myself but a guy I know has.

[gravesyt]

cheers there's  a TDI specialist who does all the work on the gal for gave him ring and booked in going to do a clean and actuator for me hopefully that should sort  it out , other wise its camping not caravan :( 

[gravesyt]

all . quick question if the n75 valve -boost censor is faulty will it show its fault in all gears if I thrash it in each gear

Cheers

[chrispb123456]

Hi all got my caravan out of storage yesterday driving great 1, 2, 3, 4 loads of power smooth take away turbo seemed to be working great hit the dual carriage way 45 mph in 4  shifts in to 5 nothing struggled to get to 60 mph .with foot to the floor  lucky for me I had my laptop with vag on it so when it got home I didn't turn the engine off plugged vag in  to see the error code Nothing at all check for holes in pipe work that I could see nothing  so took the gal solo for a blast and I mean a blast at 70 ish she still wants to go and can feel it pushing me back in the seat , is it the actuator . n75 valve   the van weighs 1154 kg so 69% weight ratio so not to heavy  god help me if I hit a hill :( got to get this sored fast away next wk  or dog house for the rest of the year all privileges stopped :angry:

Any fault codes would be saved regardless of engine kept running, are you sure your vagcom setup is working correctly? check this by disconnecting MAF sensor then start engine, now check for fault codes you should have something like "MAF G70 open or short to ground" if it still shows no faults then vagcom is not configured correctly.

[gravesyt]

vagcom working fine had problem with abs the other wk fault code abs censor  going to look at turbo and actuator this Sunday weather permitting  before for it go's in for service at the TDI specialist also all piping one thing I did notice when pulling the caravan was a faint smell of diesel/ oil when I unhooked  I think it might be one of them things seek and you shall find but you might not like IT also if anyone has the info what are the diameters of the vacuum pipes I think there are sizes the one going to the ecu seem a total and size and braid to the rest

cheers   

[chrispb123456]

In that case take it for a run with the caravan and collect some live data using measuring blocks 003, 010, 011.

Scenario 30 to 40 MPH 3000RPM 100% throttle.

[gravesyt]

Hi Chris did that solo the other day but can't find the file what it did notice when putting her through her paces in 5 th gear she was a bit hesitant on take up which as open a new line of enquiry throttle body ? got to find the file first as for the van she staying put till I sort this out . Hopefully if its nice on Sunday me and the grandson (6) will look at the turbo and vanes first then go from there

 

[chrispb123456]

To find file go to my computer, click on your hard drive usually C:\

Now look for the ross tech folder and double click

Now double click the VCDS lite folder

Now double click the logs folder

 

Or go to start click on search and type in      C:\Ross-Tech\VCDS-Lite\Logs

[gravesyt]

Found it in v-scope will look at it later

[gravesyt]

Hi Chris had a look a the file might have a problem with one of the injectors only had them service at 100k but not to sure

[gravesyt]

OOPS sorry not injector . one of the reading  mbar is constantly showing 1020 mbar  

[gravesyt]

had the company shed for the last 2 wks so not been near the Gal  so took her for a blast to sort this problem out once and for all gave her good thrashing and more :ninja: had a look under the bonnet diesel leaking from injector not the leak off pipe this I think might be the issue with power loss in 5 th gear hoping its just a copper washer there no mis firing or signs/sounds of any damage she starts fine  and oil levels are ok no diesel in there