do I need injectors or just o-rings - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 03-30-2013, 08:27 PM Thread Starter Rookie
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do I need injectors or just o-rings

I'm working on a 1999 F450 with 7.3.
The truck has no power & has a misfire when I accelerate.
I removed the valve covers to inspect the injector situation.
A couple have very little oil coming out of them.
How do I know if I need injectors or just new orings?
At 300 each I don't want to replace the injectors if I don't have to.
On another note this truck dose not smoke allmost at all. even when its cold there's about as much exost as a car. My other powerstrokes have all smoked a lot more but this is newer. I never see the ebpv move could it be stuck?
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post #2 of 4 Old 03-31-2013, 07:48 AM
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There are a lot of other things that could cause those issues.
Have you ruled out ICP/IPR related by use of a scanner?
Perhaps a short in the UVCH?
Turbo building boost like it should?

PIS 230/80's, Van Turbo with EBPV, BD Billet Wheel
Lots of money spent at RiffRaff
Dual SD fuel pumps, in tank mods, CNC Fab bowl retain kit. SDK Tunes. Isspro.
Still pretty slow, just less slow now.
Originally Posted by peixinho View Post
I love finally having my truck back... that 7.3 dog that I was driving was just not cutting it.
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post #3 of 4 Old 03-31-2013, 07:48 AM
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is it consuming oil? Check the fuelbowl filter for oil contamination.

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #4 of 4 Old 03-31-2013, 09:49 AM Thread Starter Rookie
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I think you may be on the right track with the ICP or IPR. The conector on the IPR seems loose I removed it & cleaned it & put it back. I removed the wire from the ICP (I saw a utube vid that said if the ICP is bad it will start & run fine when you remove the wire because it dose not get the signal to open the IPR dumping the oil.) & it seems much better. no more mis. I tested the injectors with it running by removing the wires one at a time. They all made the motor slow bown so they are all doing ok at least at idle but it didn't mis at idle.
I checked the fuel bowl & no signs of oil in the fuel. I don't think it burns oil, it dosen't smoke at all I think it's strange how little it smokes. I don't know what the UVCH is?
I'm going to go buy a new sensor.

Thanks for all the help. I like working through these things so I know where to look the next time.
I bought this truck not running & between here & utube I've worked through most of the problems. It's nice to see it comming back to life.

I put in the new Fuel Injector presure sensor. It has a lot of power back but still misses. not as bad mostly going up hill or when I step on it
I put in a new crank sosition sensor. that took care of the misfires.
260xxx miles & she runs like a champ now.
I got it for 800 not running
filters & oil 100.00
Glow plug relay was stoping it from starting 60.00
fuel injector presure sensor caused low power 170.00
Crank position sensor caused misfire 30.00
With some paper towles & brake cleaner oh & some seafoam I have 1200 in it Not bad for a weekend of work

Thanks Joel & timmyboy for your help. Oh & Utube theres some great videos on there if you want to see what to expect when you take stuff apart.

Last edited by aalllabout; 03-31-2013 at 05:52 PM.
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injector "low power" ebpv

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