build thread: year of the 7.3s

[Swaan]

ok, I'll say it.

that truck has a misfire.

Misfire. Ya that's for sure. Lol. Perty much got a dead hole there.

 

[dentexpowerstroke]

Checked it out and haven't found anything mechanically wrong with motor or injectors yet. Going to compression check it this weekend. Contribution failure is showing on 1 and 8 but it's not following any injectors. Tuning has smoothed it out a lot so far. That tune the video was taken in was one of the first tunes written for the truck. Will find out more this weekend

 

[mustube]

Check the valve cover harness? Switch injectors in their holes? 8 is probably just the cps.

 

[dentexpowerstroke]

Already switches holes and the cct failure didn't follow. So either it's low compression or something else I've over looked

 

[Dieselboy.]

Don't take the cct to heart. On a freshly rebuilt engine I think if the dozens of cct tests done maybe 2-3 came back with no code.
I've come to realize its what to expect with 200%+ nozzles.

Fwiw. My motor has "failed" at least one cylinder since day 2. It now has 35k and 50+ passes at the strip (knocks on wood).



Not going against Dave. As he's probably forgotten more then I know. But on my cell phone. To me it just sounds like too much icp at idle.

 

[dentexpowerstroke]

Honestly I'm thinking it's tuning related in the video. As I said, it was the first tune wrote for the truck and with further changes its pretty smooth. Still has a little chop but each tune is getting better

 

[hucorey]

I'm sure you'll get it. I dont think anyone has ever dialed in a set of 400/400's on the first tune. :thumbup:

 

[Dmstrucks02]

Not going against Dave. As he's probably forgotten more then I know. But on my cell phone. To me it just sounds like too much icp at idle.

I thought he was taking about the in cab video, sounds like a mis fire

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[Dmstrucks02]

http://www.youtube.com/watch?v=4LAwFVA4Iy8&feature=youtube_gdata_player

this is it

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[golfer]

I thought he was taking about the in cab video, sounds like a mis fire

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for sure.

6-7 seconds into the video, as soon as the truck moves/revs...dead miss.

idle actually sounded ok, LOL...lots of ICP, but other than that...dead miss when accelerating.

tuning isn't going to fix that.

 

[strokin'_tatsch]

I agree. Under load there is an obvious miss. I don't see how that could be cured via tuning changes, but I've been wrong many times before. I would be testing injector circuits and checking compression asap.

 

[Dmstrucks02]

for sure.

6-7 seconds into the video, as soon as the truck moves/revs...dead miss.

idle actually sounded ok, LOL...lots of ICP, but other than that...dead miss when accelerating.

tuning isn't going to fix that.

To me you can hear it in the upper rpm as well

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[dentexpowerstroke]

Oh well, I fixed it today. Windows 7.3 now installed on the engine... will be deciding next step this weekend

 

[strokin'_tatsch]

Well that didn't take long!!!

 

[mustube]

Stock bottom end?

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[bluedge8]

ouch!

 

[KBMKVIII]

So how much did it handle?
Jk sorry bud.

 

[njjeep]

Sorry to hear I also installed windows 7.3 recently. Hopefully you decide to build it back up but with a stronger bottom end this time.


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[dentexpowerstroke]

I'm looking at either a 12v swap or completely built motor. I figured it'd blow, just didn't know how long. It lived a very hard life for the past 20k miles.

 

[DocBar]

I'm looking at either a 12v swap or completely built motor. I figured it'd blow, just didn't know how long. It lived a very hard life for the past 20k miles.

Sorry to hear that. Swamp's makes a pretty mean motor!!