Howdy yall,

I'm not new to diesels, I've had several Dodges (my current 01 is pretty hot, has twins etc), but I just picked up my first powerstroke from my neighbor last night for a steal, and I've already noticed a couple of issues.

First off, it's a 99 F250 7.3, 4x4, Auto, crewcab, shortbed, bone stock other than an air-raid intake, blah blah blah. Let me know if you need anything info in particular.

So, the first issue is, I've got a strange miss or stumble or hesistation or slight buck, whatever you want to call it, when you're light in the throttle around 40-50mph. It pretty noticeable. It'll start behaving fine if you go mid throttle or get it to downshift to get over the mph range. I believe it might be injector related, since my neighbor recently said it idled rough, so he replaced the injector o-rings and glow-plugs on the drive side of the motor, and it now idles fine. So I'm thinking that since his daughter who drove the truck let it sit for a little under a year before my neighbor took it back and sold it to me, that some diesel might have been left in a nozzle and it ended up slightly plugging it.

Now he has the new o-ring set and new glow-plugs for the other (passenger) side of the motor, I'm wondering if doing those might clear up this problem, or if it might be a bad injector, or if someone has any other ideas that I can do?



Second issue is that after the motor warms up a bit, there is what sounds like a powersteering pump groan at idle rpms, but it clears up after 1000+rpm. And I say it sounds like the PS pump because it'll get louder when you turn the wheel a little bit, BUT it also gets louder the harder I step on the brakes, so I'm thinking maybe the booster or maybe a vacuum pump is acting up. Is this a common powerstroke issue? I would just like a little input before I start trying to throw unnecessary parts at it.

Appreciate any input yall might have!

Thanks,
-CB

 

for the stumble, check the fuel filter. my 94 would do that when it got dirty. the whine is the PS pump. i don't know if it's a sign of it going out but mine whines when i turn and hit the brakes since they did decide to go to the hydro boost brakes. ( i think thats what it's called)

 

Too fix yalls ps groan suck out all the powersteering fluid refill start crank the wheel all the way left all way right do bou ten time all the way both ways the suck out refill reapeat, do that process 5 or 6 times will fix groan and maker ur ps pump last longer ;-)

As for the stumble I got same issue, ill replace ff next check but id like to do new nozzles eventually...

 

Please try and type and spell check properly...

The powersteering whine is just that, the brakes are powered by the same pump the powersteering is.

I have had great luck replacing 1 or so qts of the ATF in the powersteering res with Lucas powersteering stopleak... You can get it at walmart pretty cheap.

I am not a fan of any Lucas products on our trucks, but this one works pretty slick.

Nozzles on a powerstroke can not and do not get plugged.

Change the fuel filter, check the fuel pressure and go from there.

 

Thanks so far yall. I actually took the truck up to my buddy who's a mech at a dealership. He hooked up his laptop to it, ran the tests, and told me to replace the driver-side injector wiring harness and valve cover gasket.

He didn't have a lot of time to elaborate, so I'm still a bit curious about what the deal is with all that. I figure I'll have to go ahead and drop an arm and a leg for these dealer-only items I'm assuming? Any idea about how much they cost, part numbers, or any other info for messing with these?

And the PS/Brake noise was due to the fact that the reservoir was damn near empty (which I retardedly didn't check, and just took my neighbor at his word that he just filled it not too long ago). So now I just have to hunt down where that leak is, or try that stopleak like you said... I had no idea the brakes and PS were run off the same pump.

 

The injectors are powered by the gasket and wire harness, there not super expensive and quiet easy to replace. When you pull it apart you will more then likely see a burnt connection somewhere.

Remove and replace and see if your issue goes away.



Might not be a "leak" just lack of maintance...

The stop leak product is just good for the pump in my opinion, never had a leak in mine, just noisy.

 

Good deal. So it's just like it sounds like, unplug from the valve cover, remove valve cover, unplug harness from inside of valve cover gasket and from the 4 injectors, throw away old harness and gasket, plug new harness into injectors and gasket, reinstall valve cover, wham bam thank you ma'am?

I've got a friend who told me he has a used wiring harness out of a 00, is it worth it to try using his used one, or just ponying up for a new one when I go to get my gasket? And I'm sure this is the stuff that you're wanting to stay OEM on right?



Ah. Thanks for the input!

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I'm gonna take off the cover and just make sure it's not loose, but in case it is bad, is this the guy I need?

I don't see anything on there about being handed for the driver side or passenger side. And I like that price a heck of a lot better than the $106 for the gasket, $98 for the wiring harness that the dealership just quoted me... This one's only $87.99 for both! What do yall think?

 

Sounds good but hopefully it’s the same quality as the factory parts. Otherwise you could just be doing it again very soon. And as for used parts, if it’s remanufactured then yes i would use it. If it’s off my buddy’s truck and he says it’s good. No thanks i do not feel like doing it twice just right the first time.

 

Yeah, you're probably right. Wasn't remanufactured, just one he pulled off a truck that his shop was scrapping. Who knows what it's condition is. But I'll at lease try that kit and see if it fixes the problem. If it does, and it comes back later, I'll already know what it is, and just go get OEM parts from ford.

 

that price seems pretty low. for everything.