2.8 K-Jetronic control pressures

[greymrj]

I am trying to check the fuel pressure is correct on my S1 and that the warm up regulator is working correctly. I have found lots of references to the pressure needing to be checked, and needing to be within parameters.......but I cannot find what those parameters are supposed to be! Nothing in the Heath 'bible' of the Ford 2.8 manuals I have, lots of info on the web on how to test the K Jet but, so far, I have only found pressures for the Mk1 Golf! I believe there should be three figures (at least), the pressure at the regulator output side when cold, the pressure at the regulator output side when warm, and the residual pressure at some time after the engine has stopped (to check no pressure loss back through the system.
Can anybody (Loach1 perhaps?) fill in the gaps?

[Loach1]

I believe these are the target pressures:

System pressure: 5 bar
Cold control pressure: 0.5 bar
Warm control pressure: 3.7 bar

I wouldn't worry too much about the cold pressure if it's closer to the warm pressure, unless you are having problems with cold running in the first few minutes. I'm not sure what temperature the cold pressure should be measured at?

Good luck! Set it and forget it!

[glenrobbo]

Hi Richard,
There were a series of articles in Fast Ford magazine "Tech Talk" starting in Aug 2008, by Stu Sanderson, explaining the Bosch K & KE Jetronic systems in great detail.
The system pressure was definitely 5 bar, as David has just said, but I can't remember if the other pressures were mentioned.
Perhaps you could find the articles on-line?

HTH
Glen

[greymrj]

Really appreciate that guys, thank you very much indeed. I spent a whole evening looking at web articles without finding that info.

I borrowed a fuel pressure measuring kit from a friendly garage and a seal leaked when I used it so I now have to wait for Sykes Picavant for a new seal so I can repair the kit before testing the car! My S is certainly testing my patience at the moment. The seal did however start to leak at approaching 5 bar so it does look as if the initial fuel delivery pressure is OK, which is a good start.

[Loach1]

Don't despair! If you have good system pressure, everything else is adjustable. Shame about the seal, but you're off to a good start. Hopefully you'll find the warm control pressure is a bit out whack and after some adjustment your car will be transformed.

[greymrj]

Thanks again, I am stubborn and 'she'is NOT going to beat me! SP have been very helpful and seal is on its way. Should be back in test mode before the weekend!