Question 99 7.3L bogs down @ 1500 rpm

[jaysee]

Here's the problem...When my rpms reach 1500 on cold days, the engine starts to bog down and lose power. It goes away when I accelerate. And it doesnt happen during warm weather. Very annoying. Sound familiar ?

 

[BIG JOE]

Here's the problem...When my rpms reach 1500 on cold days, the engine starts to bog down and lose power. It goes away when I accelerate. And it doesnt happen during warm weather. Very annoying. Sound familiar ?

First off.. WELCOME TO SDD , Glad yer here.

Tell us a bit more 'bout yer PSD ? Early/Late 99, F=???, Miles, Tranny any Mods

 

[jaysee]

Early 99 (Sept) F350 with 80K miles. 4WD, Auto, 3.73, SRW, no mods.

 

[dmd]

Also, define "cold".

Does it do this always when the weather is "cold" or just sometimes?
Does it go away when the engine gets to operating temp?

 

[BIG JOE]

also, define "cold".

Does it do this always when the weather is "cold" or just sometimes?
Does it go away when the engine gets to operating temp?

x2 ?

 

[jaysee]

It started acting up in April. Temps were in the 30's. And it did it every time, regardless of the engine temp.

 

[Tail_Gunner]

...cold days...bogs down....lose power...doesnt happen during warm weather. Very annoying. Sound familiar ?

Yep. EBPV

I'm betting the sensor tube going from the right side exhaust manifold to the Exhaust Back pressure sensor is either plugged with soot, or it has a hole rusted through it.

A quick test would be to when you are having the problem, disconnect the wire connector going to the turbo pedestal EBPV actuator. That will deactivate the EBPV. If the problem goes away, then you'll know its something with the tube or sensor.

 

[iracemine]

X2

 

[BIG JOE]

x2

x3