Hello!

When i press the accelerator over 1/3rd, the engine hesitates like is got rich mixture. I changed the distributor cap because the old one was in a pretty bad shape. This improved the things a little bit. Next i removed the spark-plugs. No 1 & 4 cylinders were ok, but the rest were black, rich mixture black.
The fuel pump is pretty noisy, but i think is either the fuel distributor or the injectors...

Any idea?

P.S. Sorry for my bad english

 

change the plugs and if the plugs aer black there is a possibility of bad injectors

 

I forgot to mention that the water temperature gauge isn't working. I checked the sensor (it's the 4 wire model) and no voltage is coming to it. I found an electric scheme and tomorow i'll try to find out why. Do you think the two problems are related?

 

it very well may be ... i think you have to mesure the rsistance at the sensor (ohms) to see if it is functional

 

sor the sensor is the 4pin one not the 2pin one on the top of the flange