I’m from Chicago with 05 Jeep Liberty crd and have done extensive rebuilding of my upper motor to make this jeep more reliable and daily driver. You can see everything I replaced so far here
viewtopic.php?f=5&t=85506 jeep has been running great so far with only two exceptions.
1) Cold start issue: living in the Windy City, it can get cold in the single digit regularly and sometimes in negatives with the windchills. I have never plugged in the block heater. Sometimes when it’s in the teens it takes me 3-4 long cranks to get her going. And this is with me having Sasquatch intake heater on for 1.5-2 minutes and cycling glow plugs 3-4 times.
I’ve recently read that ambient temp sensor controls the glow plug time. So I hooked up the OBD scanner to see if I’m getting any reading on the ambient temp sensor. And nothing. It read 0. I checked to make sure I do in fact have the ambient temp sensor and it is connected properly. I didn’t dig much deeper since it’s still cold outside but I wanted to see if anyone was able to get a reading on their ambient temp sensor using any of the obd app? I don’t have the overhead information console, not sure if that matters.
2) MPG issue: I average anywhere from 21-23 mpg in the summer with mostly highway driving with 70mph speed. In winter it’s 16-18 mpg. I still have the viscous heater plugged in and the mechanical fan in. I know they increase fuel consumption. I also always put in diesel kleen power service white or silver bottle depending on the weather. GDE eco tune is already flashed. I saw 18.5g/s on my MAF. This is with new rockers about a year old with 10,000 miles. I always see people talking on this forum how they get 25-30mpg. I have never seen that. Wondering if there is something wrong with my crd? Two things I plan to do, not sure if they are causing this issue. Replace MAP sensor and boost solenoid. I been hearing buzzing noise from the passenger side and traced it to the boost solenoid. And the solenoid also feels hot to touch after driving for 20-30 minutes.
Thanks for your time! I have learned great amount from this forum to better take care of my CRD. Words can’t describe my gratitude towards you guys.
Terry