E30 Zone

Hi guys

As I already said in another topic, I removed an LPG installation from mijn '84 320i for various reasons. It had been running on LPG for 3 years. It started on petrol and then automatically switched.

I never tried manually switching it to petrol when the installation was still present because I thought there was no switch (found one eventually) so I'm not 100% sure the lack of power is caused by some residue wiring or parts from the installation, but I don't think so. I removed anything obvious.

Symptoms:
- It ran fine on LPG
- It starts pretty good
- A little rough idle
- No power whatsoever
- In fourth gear it goes to 3000 RPM and no further, in fifth the RPM almost don't go up
- Very poor fuel economy. 20-30 liters on the meter

What I tried:
- Drained the fuel and put fresh fuel into it
- Agressive injector cleaner
- New fuel filter
- Other spark plugs
- Fiddled with the ignition timing

What I'm investigating right now:
- The blue plug doesn't give a reading, so I think it's broken. But other people with an early M20B20 also don't get a reading and theirs runs fine. Could it be that the plug causes such big engine problems or not?
- Could it be that the injectors are so badly clogged up?
- What's this pressure switch for?





It looks like it has been messed with. There an extra resistor soldered between one of the 2 pins.

Thanks guys

Problem solved

I was looking at the wrong blue plug. There's another one next to the first injector.
My injectors were very badly clogged up