1st problem!!! friday the 13th - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 22 (permalink) Old 04-13-2007, 09:53 PM Thread Starter
 
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1st problem!!! friday the 13th

truck is idling at 1200-1300 in neutral and exsaust is reallllll hot, so im thinking it's stuck in regen mode, gas milalage went into the crapper. this started after I decided i had enough of babying it and drove it hard for about 15 minets. funny thing is when you put in drive and step on the brake it idles down to where should be??? prob something to do with lost vacume....hey wait a sec, maybe a vacume hose is off??? cause when i press real hard the brake petal it will go real low, so maybe the booster not getting enough vacume cause of a vacume leak somewhere, who knows this sucks, the nay sayers are prob lovin this, just thought id let u all know....taking in on monday for reflash and whatever. lets hope the find prob, or at least hope for my sake. by the way i tried everything to get it to stop, ie take for another easy ride, shut it down, let it sit for 2 hours....every time i start it it idles back up after about 3 min or so.
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post #2 of 22 (permalink) Old 04-13-2007, 10:47 PM
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let us know what they find.

1996 Gmc k2500 4x4 6.5 turbo diesel, with mods Blew the head gasket, put all new heads, valves, injecotrs gaskets etc on the truck only to get it together and find out it had no oil pressure, and sounded horrible (pry a spun bearing). SOLD
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post #3 of 22 (permalink) Old 04-13-2007, 10:52 PM Thread Starter
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u can bet i wll
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post #4 of 22 (permalink) Old 04-13-2007, 10:57 PM
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wow sounds like what my gas burner is doing right now, but mine is doing it iermittently like whe I come up to a stop light put the truck in neutral and the rpms go to 1500 so I put it in drive and turn the a/c then back to normal but with no load I have a surging issue or the idle just hangs a 1100 or so but not all the time ??? don't know what to do
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post #5 of 22 (permalink) Old 04-13-2007, 11:18 PM
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its not going to be a vac leak, its got a hydro booster not a vacumm booster.
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post #6 of 22 (permalink) Old 04-13-2007, 11:44 PM
 
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ur gasser problem is probably from a bad idle air control valve
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post #7 of 22 (permalink) Old 04-14-2007, 12:10 AM Thread Starter
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I wonder why when u step on brakes the idle goes down?:shrug: let off goes back up:shrug: and as i said only when in neutral or park and then when i step down hard on brake petal it goes to the floor allmost. freakin weird, im sure they will fig it out but still a pita
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post #8 of 22 (permalink) Old 04-14-2007, 01:33 AM
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Quote:
Originally Posted by QUICK83
truck is idling at 1200-1300 in neutral and exsaust is reallllll hot, so im thinking it's stuck in regen mode
You say here that it is in regen, which would be a normal thing...



Quote:
funny thing is when you put in drive and step on the brake it idles down to where should be???
...and here you say that the idle drops while on the brake.

I thought I had read somewhere that it is normal for the high regen idle speed to drop while on the brake?

Also, you say the truck is "stuck" in regen, but in trying to solve the problem, you've "taken it for another easy ride" and "let it sit for 2 hours" (off I assumed). Have you tried a half-hour drive at highway speed to allow the DPF to get hot and complete the process?

Only trying to help. Sorry I can't help more. Mine is still on order. Hope you get it straightened out!
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post #9 of 22 (permalink) Old 04-14-2007, 01:52 AM
 
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Quote:
Originally Posted by QUICK83
I wonder why when u step on brakes the idle goes down?:shrug: let off goes back up:shrug: and as i said only when in neutral or park and then when i step down hard on brake petal it goes to the floor allmost. freakin weird, im sure they will fig it out but still a pita
Thats normal, also wait an extra second before putting it in gear.
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post #10 of 22 (permalink) Old 04-14-2007, 02:25 AM
 
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I thought this thing wasn't supposed to go into regen mode unless you were moving? That is a problem if it's doing this while he's not moving?
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