View Single Post
Old 12-17-2014, 10:29 AM   #35 (permalink)
320touring
Master EcoModder
 
Join Date: Jun 2010
Location: scotland
Posts: 1,434

The Mistress - '88 Bmw 320i Touring SE
Team m8
Last 3: 27.17 mpg (US)

Germany Beadle - '91 Mercedes 300td (estate, N/A)
90 day: 24.63 mpg (US)

The Bloodylingo - '05 Citroen Berlingo Multispace Desire
90 day: 39.77 mpg (US)

Shanner Scaab - '03 Saab 9-5 estate Vector
90 day: 26.19 mpg (US)

Clio 182 - '05 Renault Clio RS 182 182
90 day: 31.73 mpg (US)
Thanks: 90
Thanked 95 Times in 79 Posts
Quote:
Originally Posted by Rembrant View Post
Injector pump case pressure? Do these older pumps have case pressure valves? Maybe the case pressure is fluctuating and causing the timing to jump around?

How many RPM is this fluctuation?

Vacuum leak somewhere...

My VW TDI is only an 03, but with 200k miles on it...every vacuum line on the car had to be replaced...all rotted.
The leak off pipes certainly look ropey,as do the ones up to the control valves on the bulkhead.

I'm not sure re the pump having a pressure valve-its cable throttle and mechanical fuel pump so very basic.

The rpm doent really fluctuate-just the cars responsiveness to fixed levels of throttle input varies-you can feel it surge along the road then drop off

Quote:
Originally Posted by jcp123 View Post
Reminds me of my Mom's VW Beetle 1.8t. At something like 25k miles, it had a rotted and mostly missing vacuum line.
Vacuum lines/leak off pipes and fuel filters sewm prime suspects-may get one or two of each ordered
__________________
My Blog on cars- Fu'Gutty Cars
http://fuguttycars.wordpress.com/

US MPG for my Renault Clio 182


---------------------------------------------------
  Reply With Quote