I have a 1995 diesel Jetta and I cannot figure out why it does not start well (at all) cold. It does start fine if the block heater is plugged in. I have...
- tested glow plugs many times (even visually with injectors out)- all are okay. starting does not improve even if glow plugs are jumped to battery.
- tested compression - above minimum.
- had injectors tested - okay.
- replaced, fuel filter and air filter
- the fuel is NOT draining back at night.
- Injector timing has been checked.
- The car runs fine when it has finally started (and starts okay if plugged in).. but it takes a lot of cranking to get it going if it is cold or has sat for 6 or more hours.
Any other things I should check?? Besides replacing the injector pump?? - yikes.
Help would be GREATLY appreciated.
Jesse