Having a hard time to start my jeep at 0 degree celsius, tested the 5volts plugs, 0.6 ohms each. No cel. It starts but dies, it take me 3-4 times to get it going. I have the weeks kit with the glow plug in it, how long should I keep it on before I turn on the jeep GP? I just updated my program to 5volts(GDE) but didn't help. Tomorrow will try cycling the GP 2-3 times to see if it change something. Will start fine at -10 degree celsius if plugged in. Need help, starting not to like the little thing.

What are the specs and health of your battery, and alternator? (The more cold cranking amps CCA, the better.)

I use the block heater in my garage overnight. Timer starts up at 4 AM, and I start up around 6:30 AM. At work I don't have the block heater option. Leaving work I usually use my mobile phone timer to ensure I get a full 60 +/- seconds of GP action, totally ignoring the curly Q light on the dash. I am assuming that the "on" switch is cycling the Bosch 5V's a few times within that 60 seconds.

Seems to work(ish), although this winter was very mild compared to last year.

Leaving work I usually use my mobile phone timer to ensure I get a full 60 +/- seconds of GP action, totally ignoring the curly Q light on the dash.

The battery and alternator are fines, getting a good 12.6 volts

The battery and alternator are fines, getting a good 12.6 volts and 14.3 from the alternator. Was -7 degree celsius on sunday, didn't want to start even after several keys cycling, even broke the ignition keys switch(that little shaft), good thing I had a screw driver to jump start the starter. The jeep was pluggged in but the military police unplugged it because I wasn't allowed to plug my car on the base and I got a 40$ ticket. They let me plugged it, so I plugged it for 2 hours and it fired after a couple of starter jumping.

You previously stated you waited a full minute after the cluster glow plug light goes out, before cranking. This is not recommended if you're running our intake heater kit. Try cranking immediately after the light turns off, rather than waiting, and report back.

ok CRD4U2 last night was cold -10 to -15 celsius so i didn't use block heater , first crank after waiting 6 sec no start sec. time started smoke (WHITE) and died third and fourth same looks like fires only on 2 cylinders finally started after 6-7 attempts and rpm jump to 1500 lot of noise and didn't die this time. so i say this is normal because i have done everything possibly to this unit and my engine i s healthy so look like to me your 5 v GP metal is the same performance like mine 7v and this is 2nd set in last 2 years so i guess previous owner had connections with dodge dealer so he new ceramics are good for 8 years so he traded in on time .

The jeep was pluggged in but the military police unplugged it because I wasn't allowed to plug my car on the base and I got a 40$ ticket. They let me plugged it, so I plugged it for 2 hours and it fired after a couple of starter jumping.