posted this on tdiclub, but might as well check here too...
My girlfriends 2000 Jetta TDI starts hard in the cold. The first start will take about 6-8 seconds of cranking to kick over and idle is 100% perfect right after hard starting. Here is some other info...
1. new starter (non-bosch)
2.battery is good (vw checked)
3.4 new glowplugs (bosch)
4.injection timing was checked, vw said upper middle and told me it was pointless to change.
5. cycling the glowplugs has an small effect, but does not solve the problem
6. even on the coldest day, once it starts you and turned off quickly ( 5 seconds of running) it will fire back up instantly (like summertime) no problems.
7.I have cleaned the EGR valve and the intake is about 70% open.
what to do next? any ideas