1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

strange idle in the cold

Thread Tools
 
Search this Thread
 
  #1  
Old 01-30-2010, 11:31 PM
cummins12v 93's Avatar
Diesel Fan
Thread Starter
Join Date: Sep 2009
Location: sussex
Posts: 33
Received 0 Likes on 0 Posts
Default strange idle in the cold

hi all i went out 2 start my truck this morning & it decided 2 make the strangest sounds it was rocking over like it had a super cam in it like a hot rod is this safe? it only does it when i first start the truck on cold cold mornings it only did this once b4 to me by the way it was like hard detonation if i hold the throttle a lil ovr idle it runs fine till she warms up
 
  #2  
Old 01-30-2010, 11:42 PM
tltruckparts's Avatar
Diesel Bomber
Join Date: Aug 2009
Location: Lincoln, CA
Posts: 2,124
Received 102 Likes on 94 Posts
Default

sounds to me like your timing is getting advanced or retarded too much for the cold start. or possibly air in the lines on start up
 
  #3  
Old 01-31-2010, 07:59 AM
cmnspwr05's Avatar
Diesel Fan
Join Date: Jan 2010
Posts: 50
Received 0 Likes on 0 Posts
Default

Originally Posted by tltruckparts
sounds to me like your timing is getting advanced or retarded too much for the cold start. or possibly air in the lines on start up
possibility...also how cold is it where you are? does it take awhile to turn over?
 
  #4  
Old 01-31-2010, 11:09 AM
Begle1's Avatar
Diesel Bomber
Join Date: Mar 2007
Location: Capo Beach, CA
Posts: 3,910
Received 335 Likes on 247 Posts
Default

It's typical if a little bit more fuel solves the problem.

Bump the idle speed up a tad and you'll be fine.
 
  #5  
Old 02-01-2010, 02:00 PM
cummins12v 93's Avatar
Diesel Fan
Thread Starter
Join Date: Sep 2009
Location: sussex
Posts: 33
Received 0 Likes on 0 Posts
Default

it was bout 16 degrees F when i last started the truck & had this problem &only a few revolutions out of the starter
 
  #6  
Old 02-02-2010, 06:09 PM
tjsmokin's Avatar
Diesel Fan
Join Date: Aug 2009
Location: k falls oregon
Posts: 40
Received 0 Likes on 0 Posts
Default

i had the same problem when it got down in the negative degrees. the shop said it was probably my heater grid and getting to much fuel. i came down to cali where it hasnt got below 60 and havent had the problem since. probably nothing to serious. hopefully
 
  #7  
Old 02-03-2010, 02:15 PM
cummins12v 93's Avatar
Diesel Fan
Thread Starter
Join Date: Sep 2009
Location: sussex
Posts: 33
Received 0 Likes on 0 Posts
Default

arite so im not gonna worry 2 much about it then ill jus rev the truck up a lil bit when i start it & hold it for a lil while
 
  #8  
Old 02-03-2010, 10:29 PM
seandonato73's Avatar
Diesel Wrench
Join Date: Oct 2009
Location: lebanon, Pa
Posts: 603
Received 9 Likes on 9 Posts
Default

our service truck at work has a 2nd gen in it..... no grid heater its a major pain to start and keep running till it gets a little heat in it. normally have to hold it at half throttle for like a minit or it will shut off. starts fine when it's warm.
 
  #9  
Old 02-04-2010, 11:52 AM
cummins_guy's Avatar
Diesel Bombers Sponsor
Join Date: Apr 2009
Posts: 474
Received 26 Likes on 22 Posts
Default

if you can, plug it in, I plug mine in all night.
 
  #10  
Old 02-04-2010, 04:14 PM
cummins12v 93's Avatar
Diesel Fan
Thread Starter
Join Date: Sep 2009
Location: sussex
Posts: 33
Received 0 Likes on 0 Posts
Default

i do normally plug it in but on those rather inebriated nights 1 tends to forget & thats exactly wat i do throttle wise & like u said once its started & warmed up once theres no problem with it
 


Quick Reply: strange idle in the cold



All times are GMT -5. The time now is 09:05 AM.