Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

rough idle

Discussion in 'Trucks [ Eighteen Wheelers ]' started by fmrbydaytkrbynight, Jan 17, 2008.

  1. Jan 17, 2008 #1
    fmrbydaytkrbynight

    fmrbydaytkrbynight Bobtail Member

    43
    1
    Apr 27, 2007
    Texas
    0
    I have test drove a couple of 98 model trucks with 475 cats in them. i noticed on both of them that for a good while after starting them that they ran a little rough, not a dead miss but rough enough to notice. Is this normal for that engine? One guy said he thought that cat has a computer controlled timing retard until they warm up. another guy said he thought they might have a fuel line sucking a tiny bit of air, in my opinion a tiny bit of air would darn near kill it dead. Do ya'll have any suggestions about this?
     
    fmrbydaytkrbynight, Jan 17, 2008
    fmrbydaytkrbynight, Jan 17, 2008
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Jan 17, 2008 #2
    e500gvr

    e500gvr Light Load Member

    125
    32
    Aug 21, 2006
    Bloomington,MN
    0
    That's a 10 year old truck! How many miles on them? Could be a lot of possible causes. If you have engine serial numbers or at least the engine serial number prefix I could do a little research for you. Could be a vlve clearence issue all the way to a cold injector to timing to primary fuel filter....
     
    e500gvr, Jan 17, 2008
    e500gvr, Jan 17, 2008
    #2
  4. Jan 17, 2008 #3
    animal control

    animal control Medium Load Member

    307
    12
    Aug 7, 2007
    Where I come From
    0
    Yes,If there was a tiny bit of an air sucking issue(example a loose fuel filter),the engine will drop dead as your initial thoughts.It is recommend to plug in the block heater at anything below 40f.That CAT has 11Gallons of motor oil and another 11Gallons of coolant to perculate.That roughness is a tell-tale sign,saying"Give me a minute to get my scruples together","Take it slow and easy on me for a couple".Just The Nature of The Beast.
     
    animal control, Jan 17, 2008
    animal control, Jan 17, 2008
    #3
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.