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-   -   strange idle in the cold (https://www.dieselbombers.com/1st-generation-dodge-cummins-89-93/42104-strange-idle-cold.html)

cummins12v 93 01-30-2010 11:31 PM

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

tltruckparts 01-30-2010 11:42 PM

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

cmnspwr05 01-31-2010 07:59 AM


Originally Posted by tltruckparts (Post 483300)
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?

Begle1 01-31-2010 11:09 AM

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

Bump the idle speed up a tad and you'll be fine.

cummins12v 93 02-01-2010 02:00 PM

it was bout 16 degrees F when i last started the truck & had this problem &only a few revolutions out of the starter

tjsmokin 02-02-2010 06:09 PM

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

cummins12v 93 02-03-2010 02:15 PM

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

seandonato73 02-03-2010 10:29 PM

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.

cummins_guy 02-04-2010 11:52 AM

if you can, plug it in, I plug mine in all night.

cummins12v 93 02-04-2010 04:14 PM

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


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