www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums TDIFAQ Articles Links Meets
Orders TDI Club Cards TDIFest 2013 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You



Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI 101

TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

Reply
 
Thread Tools
Old June 7th, 2013, 18:17   #1
Tosh2
Newbie
Default P087/P088 codes

Now that my long running saga of 087/088 trouble codes is close to being resolved, it might be useful to describe the whole story.

Beginning mid September of 2012, at the end of a 800 Km day, I got a flashing glow plug light (GPL) and check engine light (CEL) and limp mode, all of which cleared immediately after re-starting. Over the following 6 months, the problem recurred randomly. Sometimes every two weeks and sometimes every 2 minutes. It was impossible to trigger the fault at will, although it did become gradually more frequent over time.

With guidance from TDI 101 forum threads and the boundless generosity of 2micron, I methodically substituted fuel pressure sensor, fuel pressure solenoid and fuel metering valve. Contrary to all expectations, it was the metering valve at fault and the substitute part has fixed the issue completely.

So away I go the dealer, part in hand, only to be told "not a VW part number, not a VW part - go to Bosch" Is this the ultimate VW brush-off or what? Searching internet sites, I found the part available in Latvia (!) and Spain. The part (Bosch #0928 400 706) is $68 ex Spain, where it's apparently a part common to the Seat brand.

Given the reasonable cost of this part and the 5 minute (including washing hands) of the R&R, it's not a bad place to start if you find a similar problem. Here's a useful description from the Spanish source of how the metering valve works:

The fuel pressure control valve comprises a fuel-cooled solenoid valve.
The valve opening is varied by its solenoid coil being pulse width modulated at a frequency of 1 KHz.
When the pressure control valve is not activated, its internal spring maintains
a fuel pressure of about 100 Bar. When the valve is activated,
the force of the electromagnet aids the spring, reducing the opening of the valve
and so increasing fuel pressure. The fuel pressure control valve also acts as
a mechanical pressure damper, smoothing the high frequency pressure pulses
emanating from the radial piston pump when less than three pistons are activated.
Tosh2 is offline   Reply With Quote
Old June 8th, 2013, 04:25   #2
CoolAirVw
 
CoolAirVw's Avatar
 
Join Date: Nov 2005
Location: Kansas City Missouri
TDI(s): Jetta
Fuel Economy: 40
Default

Nice post. Could you share with us what trouble codes you had?

Edit: I'm an idiot.. (didn't read title)
__________________
Richard. ASE Certified Master Auto-Technician with L1 Advanced Engine Diagnostic Rating. ATRA Certified in Rebuilding, Diagnosing & Installing Transmissions. ASE Certified for Passenger Car Light Diesel Engine.

Now offering Malone Tunes!..............http://www.kansascitytdi.com/

Last edited by CoolAirVw; June 9th, 2013 at 15:23.
CoolAirVw is offline   Reply With Quote
Old June 9th, 2013, 15:04   #3
Tosh2
Newbie
Default

Quote:
Originally Posted by CoolAirVw View Post
Nice post. Could you share with us what trouble codes you had?

Just P0087 (low fuel pressure) and very occasionally P0088 (high fuel pressure) This is using my hand held OBD giving generic info.
Tosh2 is offline   Reply With Quote
Old June 9th, 2013, 15:24   #4
CoolAirVw
 
CoolAirVw's Avatar
 
Join Date: Nov 2005
Location: Kansas City Missouri
TDI(s): Jetta
Fuel Economy: 40
Default

I am an idiot (didn't read title.)
__________________
Richard. ASE Certified Master Auto-Technician with L1 Advanced Engine Diagnostic Rating. ATRA Certified in Rebuilding, Diagnosing & Installing Transmissions. ASE Certified for Passenger Car Light Diesel Engine.

Now offering Malone Tunes!..............http://www.kansascitytdi.com/
CoolAirVw is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help with codes adamant628 TDI 101 8 March 30th, 2010 10:36
Vag-com Codes? I Have 6 Engine Codes, What Do They Mean? nosshane TDI 101 3 July 21st, 2007 12:34
?? codes D. Reed VW MKV-A5 Golf/Jettas 1 November 21st, 2006 14:07
Handheld OBD that reads codes & can reset codes? amishman OBD Scanners 5 December 28th, 2004 13:36
Codes....HELP !! Jetta4Me General Automotive 1 September 3rd, 2004 02:55


All times are GMT -7. The time now is 04:48.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2014
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2013, All Rights Reserved
Page generated in 0.10831 seconds with 10 queries
[Output: 65.16 Kb. compressed to 58.29 Kb. by saving 6.87 Kb. (10.54%)]