fuel probs...

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Mar 14, 2008 | 11:55 AM

Superduty krazy

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From: COLDWATER On

fuel probs...

Hey guys i having some problems with my truck here....when you leave a traffic light or a dead stop my truck will accel like crazy till it hits 2200-2300 rpm then all it does is blow black smoke it won't shift until i let of the accelerator... It sort of did this before i installed my dp as you can imagin it is now worse....is it posible that my fuel position on the pedal is messed up, Just looking 4 some sugestion

Mar 14, 2008 | 02:31 PM

F350-6

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From: Texas

The first thing to check is the fuel filter. How old is it?

Mar 14, 2008 | 02:34 PM

ron's power stroke

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From: White Mnt's,New Hampshire

i would need to say look at your IC boots and air filter as well as what Chris said...

Mar 14, 2008 | 04:40 PM

Superduty krazy

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From: COLDWATER On

the filter is only 1 month old....i will check the ic boots

Mar 14, 2008 | 04:40 PM

Superduty krazy

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From: COLDWATER On

the air filter is good too but just the same i got a 6637 coming tomorrow

Mar 14, 2008 | 06:20 PM

PowerstrokeJunkie

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From: 21791

If you have black smoke, it's defanitely not a lack of fuel. Something to do with when it's injected and how much. Im thinking its not something mechanical, more like electronic.

Mar 14, 2008 | 06:56 PM

Kwikkordead

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From: Rio Rico, AZ.

I think it's a boost leak that is popping open under pressure. The MAP is reading boost and the ECU commands fuel, then the boost leaks and you get a bunch of black smoke because of not enough air.
Or it's simply a clogged air filter.
Or a wastegate falling open.

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Mar 14, 2008 | 07:06 PM

Superduty krazy

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From: COLDWATER On

when i'm checking the wastegate what should i look for???

Mar 14, 2008 | 07:17 PM

#10

Kwikkordead

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From: Rio Rico, AZ.

Quote:

Originally Posted by Superduty krazy

when i'm checking the wastegate what should i look for???

That's really the last thing to suspect here.
The way to check it, however, is to tee a line with the pressure guage the canister and apply gentle shop air pressure to the tee. The WG lever on the top of the exhaust housing should not begin to move until the air pressure on the guage reads 5 psi.
I set mine to 12 so it wouldn't open before that.

Mar 14, 2008 | 07:39 PM

#11

Superduty krazy

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From: COLDWATER On

ok well i will check the boots first, just trying to put a game plan together...I need to get this fixed before I move on to my pump mod...

Mar 14, 2008 | 08:04 PM

#12

F350-6

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From: Texas

Quote:

Originally Posted by strokin_it7.3

If you have black smoke, it's defanitely not a lack of fuel.

Thanks Kris. I was on hold with the IH dealer odering fuel filters for some 6.0's when I typed my earlier post. I was thinking air, but I guess I had fuel on the brain.

Mar 14, 2008 | 08:24 PM

#13

bdrummonds

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From: Millbrook Alabama

It sounds like a line pressure problem in the tranny to me.

Mar 14, 2008 | 10:16 PM

#14

Superduty krazy

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From: COLDWATER On

I had the tranny rebuilt in the fall....I will ask the tech that built it what he thinks ....I will start with the easy things ppl have pointed out to me, thx

Mar 15, 2008 | 05:55 PM

#15

Superduty krazy

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From: COLDWATER On

ok guys this is the part where i feel like like an a fool my air filter was junk...i put 6637 in today and it runs like a green rocket

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