Introduction and a question about 3 Bar FPR

[troman]

Hi,

I've purchased a few for sale items via PM, but this is my first post on any forum about my recently purchased 1985 eta.

I've been doing maintenance for the past couple of weeks, and yesterday I noticed that I have a 3.0 Bar FPR, when I believe I should have a 2.5 Bar FPR.

I've noticed some hesitation under load, and I thought it was a) fuel pump (replaced it), b) fuel pulse thingy (the person who replaced it with a straight pipe should be shot...put a new one in and it runs much better, and you don't hear the turbulence in the lines), and c) dirty injectors (I've run two cans of Lubro Moly Jectron - still hesitates).

Then I noticed the 3 Bar FPR.

So....this should keep a higher pressure in the fuel rail. BUT does that mean that Motronic 1.0 is going to ask the injectors to operate at a given flow rate, and the added pressure in the fuel rail doesn't really matter?

OR, is the ECU asking for a given flow rate, but the extra pressure in the fuel rail is pushing more fuel through the injector, causing a rich condition, and hesitation?

Also...I've just bought a Mark D chip. If the latter is true, do you think things will balance out? Or, really, do I need to find a 2.5 Bar FPR to really make it run correctly?

Thanks!

Tim

[payney8]

02 sensor should take out any richness caused by a raise in fuel pressure.

[troman]

Ah. Good to know.

I did put the chip in, and it has smoothed out a little. It may have been getting used to the K&N panel filter too. There are so many variables with this car that have been changed, it's hard to nail one thing down.

I'm adjusting the valves on Friday, and I also noticed a crack in the hose that comes off the valve cover.

Man, that chip in 2nd and 3rd gear is a lot of fun...

Thanks!

[payney8]

Thats a breather hose. Could cause some issues although ive been running mine for a while with a split and haven't noticed many issues. And yeah the ecu only slowly adjusts the 3d fuel maps which is between idle position and full throttle so it takes time for it to self learn.