Recent content by seanres

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    6.9 IDI endless hard starts

    I was turning it from the crank, I think the ratio is 2:1. So a full rotation from the mark on the harmonic balancer is 1/2 rotation of the cam gear. Either way I did feel a difference in the timing marks. Interesting, it ran but super low on power and died when I'd turn the steering wheel...
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    6.9 IDI endless hard starts

    Found the fix that I've been searching for. Turns out that the pump gear was TOTALLY misaligned.. much more than one or two tooth from the markers. After correctly aligning everything and bleeding the air she runs like a top. Cranks for half a second with glow plugs and below 40deg. Needs some...
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    6.9 IDI endless hard starts

    That was my thinking, but that still leaves me more questions as to whats causing my issue if thats not the source. I have not checked the timing gear alignment and maybe that is one tooth off?? I am also thinking of just advancing the injection pump more to see if there is any difference with...
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    6.9 IDI endless hard starts

    I finally got to testing it after having issues with a crappy Harbor Freight tester. Here were my results: 1: 400ish (forgot to record exact number) 2: 340 3: 420 4: 450 5: 420 6: 450 7: 400 8: 450 Some of the readings I stopped before totally maxing out the pressure just thinking that if its...
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    6.9 IDI endless hard starts

    Got around to installing it. Fuel pressure at a constant 5 PSI at inlet between fuel filter and IP. I also tried running the truck without the IP return line check valve and with the return line disconnected from the tank and into a bucket after the cross fitting at the back of the engine. Not...
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    6.9 IDI endless hard starts

    Ran the truck today with ether, even with ether it was a super hard start despite the super strong cranking! Idled with a lope till it warmed up, and as it warmed up it had more white smoke which I'm not sure what to make of it. There was also barely a trickle of fuel from the IP return line, it...
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    6.9 IDI endless hard starts

    I'll take a look this weekend. If I find that my $1100 rebuilt IP turned to junk immediately I will not be a happy camper
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    6.9 IDI endless hard starts

    So the new GPs seemed to help but I have run into another issue. On the 29th, I drove the truck again with the new GPs and found the truck still not super easy to start. Drove it slowly in my area for 10mins at a time, running time total 2hrs driving time total around 30mins. Stalled it, had...
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    6.9 IDI dies off throttle and weak at idle

    I do not use the GP controller, I bypass it with a relay which is connected directly to the battery. I've checked the ohms of each glow plug to be ~1ohm and the voltage as I turn them on with the momentary switch and I can see they get 12v. I have not checked the amperage, did you use the amp...
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    6.9 IDI dies off throttle and weak at idle

    When I bought it the truck was running but with a lot of white smoke, it was being used as a farm truck on a property for wood for about a year and before that was on the road back in 2021. I got the truck in 2024 and it was smoking lots and could not start without ether which brings us to today...
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    6.9 IDI dies off throttle and weak at idle

    I made a previous post and thought I had resolved my issue with a new set of glow plugs https://www.oilburners.net/threads/6-9-idi-endless-hard-starts.94431/#post-1157676 In order of what I've replaced/changed from newest to oldest, I have new: - Water fuel separator, GOLDENROD 496 (this past...
  12. S

    6.9 IDI dies off throttle and weak at idle

    I just tried to run it off of a fuel can and still crank no start!!! Really scratching my head as to what my issue is. New GP, new fuel, it ran just 2 days ago and now it won't even start! I'll be picking up a new fuel filter and seeing if that has any effect but not sure where else to go from...
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    6.9 IDI dies off throttle and weak at idle

    Compression seems OK but have not measured it with a gauge. I am going to try running it off of a fuel can to see if its something to do with the tank or fuel pickup and then pick up a fuel filter next week to see if that helps. Fuel is the last unknown besides everything else that I switched to...
  14. S

    6.9 IDI dies off throttle and weak at idle

    I've had it for a year, and don't know much besides the mileage and what I can tell has been modified. I've got new glow plugs, IP, injectors, return lines (~1 y/o), electric fuel pump, fuel lines, water fuel separator, fuel filter. I have a glow plug controller bypass and confirmed the...
  15. S

    6.9 IDI dies off throttle and weak at idle

    I've got a 1983 6.9 IDI F350 with the 4 speed manual. When I downshift or if I shift from a gear to neutral and let off the throttle too fast the engine will die pretty consistently. I recently got it up and running properly and just got it on the road. Some of the recent changes I think could...
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