High Fuel Pressure *update*

[35tsc]

I have fuel pressure that looks good when you turn the key on. Then it looses pressure. I thought it might be the injectors, then as I started the truck to see if was the same pressure while the engine was running I found after about 30 seconds the gauge was pegged (100+ psi). I am guessing I need an AFPR. I asked for one in the wanted section didn't receive any replies.

Does anyone have one they would part with or can anybody give me direction on what type and where to get one?
How involved is it to intall? Pretty straight foward? Sorry if they are stupid questions but I am sort of new to the maintance world of the Typhoons.

Thanks in advance.
Mark

 

[Don W.]

Re: High Fuel Pressure

Re: High Fuel Pressure

The high fuel pressure may be a different issue but...

Just changed my FPR. (New one form Detroit Turbo)

Like most things on these trucks it’s a bit of a pain but only took about an hour and a half.

1) Have a new AFPR ready.

2) Remove and set aside the IC. (Since I’ve rerouted the lines and they're all flex lines now I didn’t have to drain the water.) You may have to remove one of the IC lines at this point if you still have the originals.

3) There’s a wiring loom in the way of the bottom of the FPR going to some things at the front of the motor. I disconnected those things and lifted the loom up to get to the bottom of the FPR.

4) Metric Allen wrench set is required to remove the two Allen screws holding the FPR to the fuel manifold but don’t remove them yet.

5) There’s a compression type fitting on the bottom of the FPR you need to loosen. Once you do that remove the two small Allen screws holding the FPR to the manifold. DON’T DROP!

6) Remove the vac/pres line from the top and work the FPR loose from the manifold.

7) Reverse to reinstall. Don’t forget a tiny bit of lube on the o-ring. Follow instructions with new AFPR to set FP.

 

[35tsc]

Re: High Fuel Pressure

Re: High Fuel Pressure

AFPR ordered.
Will report when I have it switched.

Thanks for the good pointers.

Mark

 

[SeattleSy#1255]

Re: High Fuel Pressure

Re: High Fuel Pressure

its one of those things that if you have done it, its a 10 min job, if you haven't its a hour or more.

 

[35tsc]

Re: High Fuel Pressure *update*

I installed the AFPR last night and that seemed to fix the problem. I guess all the other parts I installed was for the cause "preventative maintenance"
The problem with the truck was it had a rough idle and would cut out at around 3,800 rpm. I first changed all the vac lines and then the map sensor along with a new O2 sensor.
I got a few suggestions from others who advised it was probably the plugs, wires, cap and rotor. Changed them, no change. I also changed the coil and the ignition module, still no change. Changed the fuel pressure regulator and everything works the way it should. I have had this Typhoon for about a half of year and since I baught it, it has never ran the way it should. I am really happy I have a nice ride that runs excellent too.

Thanks for all the help from everyone on the board.

Mark