series 60 is this normal?? - Truckers' Trucking Forum

louh · **^ Top** #1 02.28.2008

Just got a new for me 99 International with a Detroit series 60. It seems to run fine once it's up and going. What concerns me is that when it's idling especially when cold, it seems to have a sort of miss or hiccup. It will be running at high idle around 800 or so rpm's and then just kind of stutter every few seconds. Best I can describe it's like a hiccup or just missing a beat. Someone told me that this was normal? Does anyone else have these symptoms?

chief · **^ Top** #2 02.28.2008

my 2007 mack did that. diesels don't like cold weather.

MedicineMan · **^ Top** #3 02.29.2008

every detroit I've ever driven has done that. And that's lots of trucks by the way. Detroits don't like the cold. And just so you know. You make sure you have that truck pluged in at anything under probably 40 degrees or chances are it won't start.
They like to start and they idle good for a second and just when you think it's all good it will start skipping, snorting farting and every other thing you can think of. I think the block heater keeps the fuel real close to the motor slightly warm so it runs good until it draws up the cold fuel. At least it's the only theory I've even been able to come up with

25(2)+2 · **^ Top** #4 02.29.2008

There is no diesel engine that likes the cold, other than maybe a Cummins N-14, that motor started better for me cold than warmed up, possibly because the fuel in the rail would get too warm. The ISX I run now will run very rough if the fuel in the tanks gets too cold, like when shut off for several hours, or even when fueling it up if the tank is drawn down.

The Detroits I have run always started down to about 20 degrees F,without being plugged in, most of the N-14s and the few Cats I have driven would do the same. Some run very rough after a cold startup but two motors set up the same will run differently almost all the time, some will be very smooth and some will be lumpy.

Hibred · **^ Top** #5 02.29.2008

We have a 3406B Cat and that truck would start at cold temps well, it would smoke like a chimney but after a few minutes would straighten out and our current truck with the 12.7 Detroit starts well in cold conditions with no smoking, it is the first electronic engine we have had and so far so good, as to the changing of idle speed i didn't notice that on ours.

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