Bluecharm
Member
I have a 2004 Jetta Tdi Last year it started fine in subzero temperatures. This year it started having trouble starting in anything below 5 deg c so I changed the gloplugs with original 7v ones, checked and confirmed they were working, it didn’t help.
Installed a zero start inline coolant heater between oil cooler and coolant tempurature sensor housing, after a few hours of being plugged in it usually started fine. However recently no matter how long it remains plugged in she will not start. The gloplugs don’t stay on long so I cycle the ignition on and off x10 and it usually starts.
I checked the codes with a BlueDriver and she threw a P0726 code after long crank. During the crank the rpm’s jump from 0-500 initially then lay at 0 for remainder. (Rpm gauge works fine when running)
Even after a half hour + of her running and up to tempurature when shut of she will not turn back on sometimes.
The ECM and gloplugs recall was NOT performed due to the nearest dealer is 10 hours away.
Timing belt, fuel filter and intercooler all changed recently.
What is causing this?????? Could it be the crank shaft speed sensor or the wiring to it?
Installed a zero start inline coolant heater between oil cooler and coolant tempurature sensor housing, after a few hours of being plugged in it usually started fine. However recently no matter how long it remains plugged in she will not start. The gloplugs don’t stay on long so I cycle the ignition on and off x10 and it usually starts.
I checked the codes with a BlueDriver and she threw a P0726 code after long crank. During the crank the rpm’s jump from 0-500 initially then lay at 0 for remainder. (Rpm gauge works fine when running)
Even after a half hour + of her running and up to tempurature when shut of she will not turn back on sometimes.
The ECM and gloplugs recall was NOT performed due to the nearest dealer is 10 hours away.
Timing belt, fuel filter and intercooler all changed recently.
What is causing this?????? Could it be the crank shaft speed sensor or the wiring to it?
Last edited: