20v Turbo, re-map problem?

From engines to interiors , have you a question or can you help, ask and answer here !

Moderators: vwnutant, desertstorm, water01

Post Reply
silver-20v
Posts: 9
Joined: Thu Jan 17, 2008 2:35 pm
Location: London

20v Turbo, re-map problem?

Post by silver-20v » Fri Sep 12, 2008 8:00 pm

Hi guys I was wondering if anyone out there in dubland has had this issue before, I had my 20v turbo re-mapped to approx 200bhp? Now the problem I have is that every now and then when under light to mid load conditions the car makes a very slight hestiation and the boost reverts back to around 7psi, under the new software it runs at around 14-15psi. Now when it does this it stores a fault in the ECM which comes up as Boost Limit Not Reached. I have had three different re-map files put in, I have changed the boost control solenoid, fitted a brand new Bosch air flow meter, fitted a new Forge diverter valve and cleaned up the pressure sensor in the intercooler. Please if anyone can HELP!!!!!!!!! :( :( :(
Don't just do it, DUB it!

User avatar
ant
Too much time on your hands
Posts: 1663
Joined: Sat Dec 29, 2007 4:50 pm
Passat model: b5.5 1.8t 20v
Location: Alsager
Contact:

Re: 20v Turbo, re-map problem?

Post by ant » Fri Sep 12, 2008 8:24 pm

boost control solenoid is that the n75 valve ?
Image

User avatar
carmageddon
B6
Posts: 805
Joined: Sun Apr 13, 2008 7:12 pm
Passat model: b5 sport,b3gt16v
Location: The Garage again!!

Re: 20v Turbo, re-map problem?

Post by carmageddon » Fri Sep 12, 2008 9:02 pm

whose software is the car running :?: :?:
Image
Passat B5 Estate For Sale please call number above

User avatar
vr6t
still on the production line
Posts: 27
Joined: Wed Apr 11, 2007 12:12 pm
Location: Aberdeenshire

Re: 20v Turbo, re-map problem?

Post by vr6t » Fri Sep 12, 2008 10:41 pm

As the man says what software you running, at a guess its REVO??

User avatar
gor131-x
B6
Posts: 958
Joined: Wed Apr 11, 2007 11:40 pm
Location: Oldham

Re: 20v Turbo, re-map problem?

Post by gor131-x » Sat Sep 13, 2008 4:00 am

mine does the same but mines a TDI,im guessing the issue is the same....when you start putting your foot down,it will cause the injectors to overfuel causing hesitation also known as "piston slap"

best way to get round this is if it starts happening,either put your foot down till it goes or change gears,if it starts annoying you too much,just get the map with less fuelling,only thing is you will be sacrificing a bit of torque,i think the BHP stays the same,

mine does it but i just live with it as i am loving the power waay too much to sacrifice it for a bit of hesitation :lol: :lol:
Image
115BHP UPSOLUTED with 130 PD Injectors, Custom FMIC, 130bhp solenoid valve

User avatar
chimp
B1
Posts: 123
Joined: Sat Mar 08, 2008 8:34 pm
Location: Dorset

Re: 20v Turbo, re-map problem?

Post by chimp » Sat Sep 13, 2008 9:04 am

The fault you are logging, as far as I remember, means that the ECU is not seeing the boost it is expecting but if you have changed all the valves etc then you might be looking at a turbo fault or actuator problem. I would not think it is a boost leak as it would happen all the time.

Also is your can conventional cable throttle or fly by wire.
2001 1.9Tdi Sport PD130
Re-mapped at THS Performance

vwmk2
B1
Posts: 90
Joined: Thu Feb 07, 2008 8:06 pm

Re: 20v Turbo, re-map problem?

Post by vwmk2 » Sat Sep 13, 2008 8:14 pm

have you put a n75j valve on yet as that helped mine when i had a 1.8t remapped!!
Image

User avatar
ant
Too much time on your hands
Posts: 1663
Joined: Sat Dec 29, 2007 4:50 pm
Passat model: b5.5 1.8t 20v
Location: Alsager
Contact:

Re: 20v Turbo, re-map problem?

Post by ant » Sat Sep 13, 2008 8:17 pm

yep the n75j is what you should go for i think mine needs this.
Image

User avatar
jam3383
B1
Posts: 141
Joined: Thu Jun 14, 2007 4:48 pm
Location: South Wales
Contact:

Re: 20v Turbo, re-map problem?

Post by jam3383 » Thu Sep 18, 2008 7:14 pm

I had a similar problem as had the car remapped last weekend but had a stage 3 done by ecu evolution in newport. after it was done it kept going over 20psi and then going into limp mode so i clear'd the 'pressure limit exceeded' code and it would be fine untill i hit 20psi again.

I changed my dv to a forge dv, n75j, new airflow meter and spark plugs and it still happened. he's told me it could be the acuator setting as i had a new turbo last dec. Ive also got the following mods fitted: fmic, closed induction, stainless decat, k03s and full stainless exhaust from the decat back.

I'm going back this w'end to try a stage 2 and if that dont work a stage 1 so fingers crossed.



'gor131-x' where did you get your front splitter from? i would love this one as my original grill dont fit very well after the fmic was fitted.
-------------------------------------------------------
Image
http://Www.dVAGs.co.uk

User avatar
gor131-x
B6
Posts: 958
Joined: Wed Apr 11, 2007 11:40 pm
Location: Oldham

Re: 20v Turbo, re-map problem?

Post by gor131-x » Fri Sep 19, 2008 12:12 am

i bought it off ebay but be warned it is a very bad fit,needed a lot of modifying and even now,its just about right,also i bought it a few months back,that seller isnt registered anymore but you never know,it might still be somewhere on ebay
Image
115BHP UPSOLUTED with 130 PD Injectors, Custom FMIC, 130bhp solenoid valve

silver-20v
Posts: 9
Joined: Thu Jan 17, 2008 2:35 pm
Location: London

Re: 20v Turbo, re-map problem?

Post by silver-20v » Fri Sep 19, 2008 7:04 am

Hi guys thanks for your feedback, I have fitted a new n75 valve as this is what my mate who did the re-map suggested, and a Forge diverter valve. The re-map file is an Oscali or Oscari file I think, we tried a revo file aswell but it did not perform aswell as the Oscali file, The guy at Oscali used to be a programmer for Revo so the guy knows his stuff, plus I have also had four of my mates cars mapped with Oscali files and none of them have this problem. I have no boost leaks at all I'm suspecting that it may be a fault with the actuator not moving as quickly as the ecu demands boost, does this sound possible?
Don't just do it, DUB it!

User avatar
chimp
B1
Posts: 123
Joined: Sat Mar 08, 2008 8:34 pm
Location: Dorset

Re: 20v Turbo, re-map problem?

Post by chimp » Fri Sep 19, 2008 1:08 pm

Low boost would mean the actuator is weak ie opening the waste gate when it should not be.

Passatie
B1
Posts: 75
Joined: Wed Jul 09, 2008 9:30 am
Location: Newcastle Upon Tyne

Re: 20v Turbo, re-map problem?

Post by Passatie » Wed Sep 24, 2008 6:44 pm

If its the standard froge dv007 then you need to get the tuning kit and fit a yellow spring, sounds like it could be bleeding off through the divertor with the increased pressure. The standard forge divertor is no good would you believe for a remapped car

Could be, try it, its £10 for a tuning kit

Post Reply

Who is online

Users browsing this forum: No registered users and 15 guests