truck wants to cut off when coasting - Ford Powerstroke Diesel Forum

 
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post #1 of 3 Old 08-08-2013, 05:28 PM Thread Starter
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truck wants to cut off when coasting

So ive been trying to trouble shoot a friends truck and im stumped. Truck runs and drives fine but when you let off the pedal and coast it sounds like its going to turn off.

Ive checked fuel pressure and the lowest it got was 50psi, he had a blue spring to go ahead and install so we did that and now were back up to 60. FP doesnt fluctuate when the truck goes to choppin so ive ruled that out. ICP pressure doesnt drop below 550 and the IPR seems to be working accordingly. (All i have to use is the Torque app) The injector pulse width driving normally is 1200-1400. When you go to coast it drops to zero as i believe it should then jumps back up to 800 and works its way back up to 12-1400. Pulse width seems to hold pretty steady when the truck is choppin but like i said im using the torque app so im not getting instant data.

any ideas?

2006 F350
6.4 banjos
FP spring
Insight CTS
IDP/Looney SCT X3
Studded
Durastroked
S&B,CCV
FICM Repair/PHP 40hp

2008 F250 FX4
DPF-R +
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post #2 of 3 Old 08-09-2013, 06:41 AM
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Torque converter staying locked up? Coast solenoid problem?

Have you put it in neutral to see if it stops doing it?

16 F350 CC LB DRW 6.7 FX4

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post #3 of 3 Old 08-09-2013, 02:22 PM Thread Starter
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Hmm i will give the neutral shift a try but i don't really think its the trans.

Thanks

2006 F350
6.4 banjos
FP spring
Insight CTS
IDP/Looney SCT X3
Studded
Durastroked
S&B,CCV
FICM Repair/PHP 40hp

2008 F250 FX4
DPF-R +
06DZL is offline  
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