Stock D-jet 1,7 running wery lean but why? S O L V E D Options

[larss]

Have some problems with a stock 1,7 D-jet that runs wery lean, hunts and pops in the intake, hardly running at all....reving up wery uneven and slowly.

-Engine has not been running for severeal years so there is no history to tell.
-Timing triple checked 27 degrees at 3500rpm
-Fuel pressure triple checked 31psi
-All 4 injectors new (repro)
-Trigger points checked OK
-Changed to anoter MPS (which runs well in another d-jet) with no difference
-Changed head temp sensor with no difference
-Compression tested, even around 145psi
-Points, condenser, cap, cables are new (also tested with an old set but no difference)
-All injectors getting pulses, checked and injector plugs are at the correct injectors
-Yes firing order is triple checked

The only way to get it running quite OK is to replace the head temp sensor with a potentiometer at 3Kohms, runs quite good with that even when warm.
This leads me to think that it is running w e r y lean for some reason.

Any ideas?

/Lars S

[larss]

Final update - short story:
I had a long sitting 1,7 D-jet with new set of (FR114) injectors started and it ran very very lean...when I changed to a set of Bosch injectors it ran great so i suspected the new injectors to be faulty.

However it turned ot that the new injectors only were clogged, probably by old dirt the in car fuel lines (rest of the fuel system is new/cleaned).
After ultra sonic cleaning of the new injectors the 1,7 runs great an I have no reason to doubt the function and quality of the FR114 injectors! (IMG:style_emoticons/default/smile.gif)


//Lars S