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  1. Q

    IDM questions / buzz test code

    So, you don't like the Accurate Diesel valve cover gasket/harness? They made the wiring pass straight from the plug on the outside of the gasket to the glow plugs and injectors on the inside... So there's no plug on the I side to go bad or come loose. Seems good to me. Might turn my old VCG into...
  2. Q

    IDM questions / buzz test code

    Why would putting in a different IDM make my truck run badly? Sent from my Pixel using Tapatalk
  3. Q

    IDM questions / buzz test code

    Not a Doorman VCG / UVCH. I used the kit from Accurate Diesel with the wiring direct out of the inside of the VCG. I jectors are correct stock code from Full Force. All the same, no LL. I swapped the injectors around to rule out a problem with them and the cct fail code stayed with te cylinder...
  4. Q

    IDM questions / buzz test code

    Quick background, there's too much to say, but... I can tell by feel there's a slight miss, and cct fails on 4 and 8. I replaced LOTS of things so far for various reasons, incl. rebuilt inkectors. Just for kicks I tried putting in a spare supposedly good rebuilt IDM that a mechanic had left...
  5. Q

    Running compression test... How to

    Ya, sorry, I keep forgetting that doesn't necessary mean what I'm trying to say. Sent from my Pixel using Tapatalk
  6. Q

    Running compression test... How to

    Starting a new thread because this isn't just about my problem... Question: after watching DieseltechRon's video, I want to do a running compression test, I just want to confirm the process before I blow something up. So I'd pull just the glowplug on the cylinder I'm testing and unplug the...
  7. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    Mmmm. That's a good thought. I should go around checking for loose bolts and such. I wouldn't say I'm sureits under the valve cover, it's just what I've come up with, especially with the cct failure. At the moment I'm leaning towards a weak cylinder 4 and idiopathic cylinder 8 cct failure that's...
  8. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    Not suckling air, I'm pretty confident. I resealed and fixed all that stuff, and I have a fuel pressure gauge, so I think I'd notice fluctuations if it was suckling air. That was the problem in the first place, though, I bet. Whick brings me to a question: what internal damage would be caused...
  9. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    The heater works, but I haven't tried it in this case. I can say that in the summer when it was hot it smoked just a little, I'd say not much. I'll try the heater now, for comparison. So what would this tell you? Sent from my Pixel using Tapatalk
  10. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    Yes, when warmed up, I don't see smoke. Also, it runs much smoother. I did unplug injectors, one at a time too, and they all made a big difference in idle, all about the same to my ear. Maybe I'll leave the valve cover off with the truck outside overnight and see if unplugging an injector...
  11. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    It's a new IPR valve, so I doubt that's it. But how did you clean yours? There's always a possibility of some bit of dirt getting in somewhere when I had everything all apart. My impression is that if dirt did get in somewhere, it would probably make it all the way to the fuel injectors, are...
  12. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    Thanks for your response. The truck does run better now than when I got it. These are new rebuilt I jectors, not my originals rebuilt. I removed the tank, scrubbed inside and rinsed it well. Replaced the pickup with the Dieselsite hutch mod kit and the inline spinon filter. I have changed...
  13. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    I bought it with reportedly bad injectors. Stomp on the throttle, it would sputter or hesitate, make a bunch of smoke and make a scary loud kackl like grinding up walnut shells. Even when sitting if reved to a certain point, maybe 1500 it would start to billow a cloud of smoke and kackle or...
  14. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    I have the Dieselsite regulated return kit along with the hutch mod (in tank pickup) and hp oil xover. Fuel pressure on the regular output is always a solid 62 to 64. I wonder if I should try turning it up a little, tho 60 should be plenty, right? Sent from my Pixel using Tapatalk
  15. Q

    7.3 slight miss, knock, but compression and injectors seem OK... What could it be?

    99.5 F550 7.3 Powerstroke 4x4 ZF6 Makes a knock when driving that has a metallic ring to it. Sometimes it's barely there in the diesel noise, occasionally it's so loud that nobody can miss it. Computer is reporting cylinder contribution failure on #4 and #8. However, I swapped them with #2 and...
  16. Q

    Tail light /trailer-tow/chassis wiring harness questions

    Happy holidays, folks... I'm restoring a '99.5 F550 7.3 Powerstroke 4x4 165" chassis cab I'm to the point where I have about 12 or so wires going to the rear, I'm wondering if any one can tell me what they're supposed to be? Some do nothing so far but may be trailer/tow wires that aren't hooked...
  17. Q

    F550 GVWR question

    I'm an arborist, so I'm hauling all sorts of wood of various forms and related equipment. We have a couple spots in town where the DOT regularly sets up a checkpoint. I've only been stopped once and it was on my way out in our "extra" f350, not loaded yet so that wasn't an issue, and the officer...
  18. Q

    F550 GVWR question

    Can you explain why not? I realize that someone has to certify the upgrade and get the door sticker amended. But I don't see why this would be any harder than adding an axle to a truck, or the upfitting of an f350 to handle the weight of a fire fighting body. I've seen it done. I actually...
  19. Q

    F550 GVWR question

    Gotcha. I have yet to research this, but it's sounding like it may be the switch from Dana 135 to Dana 110 in the back. If so, that axle isn't cheap, but if swapped, I don't think it would be hard to get the GVWR recertified. Using know parts for a known application, it's already engineered...
  20. Q

    F550 GVWR question

    Does anyone know what the difference exactly is between an F550 with 17500 gvw and an f550 with 19000. Just wondering if it's something I can upgrade. Thanks in advance If there is a better place for me to post this question, please let me know. Sent from my Nexus 5X using Tapatalk
  21. Q

    Android app? / real diagnostics? / mechanical temp gauge?

    I have an early 1995 F350 7.3 DIT I can feel and hear a miss, though it runs pretty well and it's been this way since I got it a year ago. Now that it's getting chilly at night, the truck starts a little hard and smokes when it starts up, so I'd like to give it a little love -- Hopefully...
  22. Q

    ZF-5 PTO

    I found an available pto off on '89 f450 with zf5 and 7.3L diesel. Reportedly it's the setup that Ford sold it with, but I haven't had a chance to see it for myself or get a model yet. Just wondering if any one has any knowledge of what it would be. One question: it's an electrically...
  23. Q

    ZF-5 PTO

    Selling the whole truck. It's only got 30-some thousand miles on it and it was well maintained, but it's a little rusty. Sounds like word from the dealer is that gas engine trany really is different and the pto won't swap.
  24. Q

    ZF-5 PTO

    Hey guys, I'm full of PTO questions and I finally had a chance to crawl under my trucks to check things out. I have a '93 F-Superduty (F450) 2WD 460 gas engine, ZF5 transmission w/brake and a Chelsea pto driving a hydraulic pump mounted about a foot & a half back via shaft with 2 u-joints...
  25. Q

    ZF-5 PTO

    Hey friends... How do you measure the gear lash when installing the pto in order to set it correctly? I'm hoping to swap a pto from a 93 Superduty with a 460 gas engine to my '95 Powerstroke... Both have zf5 transmissions... Would that work or are there different kinds of zf5 that'll...

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