2350 fuel pressure decay Fault code 4726

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2350 fuel pressure decay Fault code 4726

02-21-2021, (Subject: 2350 fuel pressure decay Fault code 4726 )

Post: #9

SemiSweet Offline

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RE: 2350 fuel pressure decay Fault code 4726

I agree , 3.90s or 4.11s would be better, loaded the truck does not see overdrive as it pulls at 1500 or less which with this tune I can see would be hard on the engine.

So this guy was pretty confident in his work, he did two other trucks for guys I know . One a 2250 and one is a 871. I will be pulling there programs as I am thinking they are of similar quality.
Most likely copied from somebody else’s ECM.

Now to fix this mess..

User's Signature: 2015 389 Peterbilt. ISX 550 18speed 3.70 gears

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Messages In This Thread

2350 fuel pressure decay Fault code 4726 - SemiSweet - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Rawze - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Rawze - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Rawze - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Rawze - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Rawze - 02-21-2021,

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 02-21-2021

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 02-24-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Rawze - 02-24-2021,

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 03-06-2021,

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 02-25-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Waterloo - 03-06-2021,

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 03-06-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Chamberpains - 03-07-2021,

RE: 2350 fuel pressure decay Fault code 4726 - SemiSweet - 03-07-2021,

RE: 2350 fuel pressure decay Fault code 4726 - Mattman - 03-07-2021,

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