Chevy and GMC Duramax Diesel Forum banner

1 - 4 of 4 Posts

·
Registered
Joined
·
21 Posts
Discussion Starter #1
morning all,

looking for some information on this one as its puzzling me.

i understand i have an injector or two starting to go bad, just to get that out of the way.

reading my main injection fuel rate, at idle it jumps between 1.8 and 2.5mm^3 and it has a rough idle. when it dips below 2 all balance rates go to zero. if i put it in gear with my foot on the brake it jumps up to 10-11 and the idle smooths out.

i have new fuel filter en route but thats a week out.

thoughts on what would cause a low fuel rate in idle but not in gear?
could a few bad injectors cause this? ( i know there are a few going, with the raw fuel smell and haze at idle)

as a side note, theres no issues with hte CP3 that i can see as it will hold 23K ish.

opinion and info appreciated.

havent updated my signature yet but:

2005 GMC sierra 2500hd, EFI live( stock, 25, 50, 75, 100), transgo kit, all others stock,
 

·
Registered
Joined
·
21 Posts
Discussion Starter #2
adding some data, on a cold start, ECT around 43. fuel rate was at the expected 10 and change. after a warm up drive home from work, checked it again, and its sitting at 2.5-3.

thoughts?
 

·
Premium Member
Joined
·
334 Posts
FPR on CP3. Sounds like it too me
 
1 - 4 of 4 Posts
Top