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]

A late update on this....wow finally the car is running good! (IMG:style_emoticons/default/smile.gif)

After lots of trobleshooting I swapped the four new injectors (China made) which were fitted for a set of old yellow Bosch and the little 1.7 runs great!
The china injectors were bought as a direct replacement for the Bosch ones but simply do not deliver enough fuel.

However I will not diss the china ones until they are tested and cleaned at an expert shop. There is a small possibility that they are clogged (the car has been sitting for 10th of years and the in car fuel tubes were not flushed before starting the engine but every other hose is new).

I know many others are using them with good result, is there anyone with an opinion on these injectors (FJ114)?.


/Lars S