why does my Jeep Cherokee diesel take about 4 secs to start\/

Asked by Nov 17, 2013 at 01:37 AM about the 2005 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

at each start the motor turns over for about 4 secs before firing

4 Answers

....well yes...it's a diesel...Diesel 101 will tell you that you need a couple of moments for the GLOW PLUGS to warm up to combustion temperature before the vehicle will start....I'm guessing that this is your FIRST diesel engine~ there is usually a little green light and you have to wait for the light to go off before you turn the key to start~

1 of 1 people found this helpful.

In my second career I drove a Kenworth with a 855 cubic inch 400hp Cummins, and sometimes in winter..at like 10ºF it would take 30..45 seconds or more w/o ether. Then it would begin to hit on one or two cylinders (straight 6) for a few more seconds, then run. Summer, 5 seconds cold and at operating temp fired right up. Which is just a tangent story bilko, to compare. It was a 24Volt starter and batteries producing 2000 CCA

1 of 1 people found this helpful.
100,465

Try this, turn ignition key to on, wait 5 to 7 seconds, then crank engine, see if that reduces cranking time, but 4 seconds sounds normal to me for a diesel.

Hi if it's a modern diesel in summer temperatures it will start much in the same way a petrol or gas engine will start, as soon as you crank it. If it's caused by glow plug issues, in cool temperatures, then it will fire once the internal compressed air temperature and combustion chamber are warm enough to burn the oil vapour. The engine will smoke badly and rock about far more than normal until all the cylinders are hot enough to ignite the oil vapour individually . Then the motor will run normally until it's stood and gets cold again.

Your Answer

Grand Cherokee

Looking for a Used Grand Cherokee in your area?

CarGurus has 70,950 nationwide Grand Cherokee listings starting at $950.

ZIP:

Jeep Grand Cherokee Experts

  • #1
    inuevafreak
    Reputation
    2,120
  • #2
    Tom Demyan
    Reputation
    1,900
  • #3
    thejeepdoctor
    Reputation
    1,830
View All

Related Models For Sale

Used Jeep Wrangler
312 Great Deals out of 16,299 listings starting at $2,500
Used Ford Explorer
850 Great Deals out of 64,022 listings starting at $1,000
Used Dodge Durango
291 Great Deals out of 21,537 listings starting at $2,495
Used Toyota 4Runner
292 Great Deals out of 22,121 listings starting at $1,750
Used Dodge Charger
443 Great Deals out of 27,995 listings starting at $1,979
Used Chevrolet Tahoe
652 Great Deals out of 39,642 listings starting at $1,000
Used Ford F-150
2,318 Great Deals out of 184,579 listings starting at $699
Used Chevrolet Silverado 1500
2,108 Great Deals out of 167,055 listings starting at $1,900
Used BMW X5
425 Great Deals out of 12,392 listings starting at $1,000
Used Ford Mustang
722 Great Deals out of 38,098 listings starting at $895

Used Cars For Sale

2018 Jeep Grand Cherokee Laredo 4WD For Sale
4,052 listings starting at $27,288
2017 Jeep Grand Cherokee Laredo 4WD For Sale
9 Great Deals out of 2,783 listings starting at $23,999
2016 Jeep Grand Cherokee Laredo 4WD For Sale
531 listings starting at $27,170
2015 Jeep Grand Cherokee Laredo 4WD For Sale
17 Great Deals out of 845 listings starting at $17,756
2014 Jeep Grand Cherokee Laredo 4WD For Sale
13 Great Deals out of 849 listings starting at $13,688

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.