Project Shamu
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Senior User
Joined: Oct 2019
Posts: 135
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From: Visalia, Ca
Also, I fixed 99% of my boost leaks, have no exhaust leaks (that I can find), but yet struggling to make 24psi of boost and have more smoke than ever right now. Going to check fuel pressure next I think...
Hotshot
Joined: Mar 2012
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From: Texas
Who did your tuning?
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Senior User
Joined: Oct 2019
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From: Visalia, Ca
I have been very happy so far, but I still have Swamps and PHP tunes on my Hydra, so I'll give them a try also.
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Senior User
Joined: Oct 2019
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From: Visalia, Ca
Just went out and did some various runs in different tunes, and didnt see any more boost than with Brian's tunes. I also ruled out HPOP as it will hold steady at 3000psi all the way past 100mph in my "Drag Ripper" tune, which is a 4.3ms tune.
Gotta get my fuel pressure gauge hooked up...
Gotta get my fuel pressure gauge hooked up...
Hotshot
Joined: Dec 2012
Posts: 11,278
Likes: 1,658
From: Las Cruces New Mexico
If you have black smoke spewing out I doubt it's your fuel pressure, might be bad fuel or if you run any fuel additive it might not be mixed to an appropriate ratio.
Dumb question but how is the air filter? Also any chance theres a rag in the intake?
Dumb question but how is the air filter? Also any chance theres a rag in the intake?
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Senior User
Joined: Oct 2019
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From: Visalia, Ca
It's been like this for a few weeks now, for a couple fill ups, clean air filter and no obstructions too.
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Senior User
Joined: Oct 2019
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From: Visalia, Ca
Stock AB injectors with unknown mileage. Truck has 386k miles on it, I've owned for 66k miles, and previous owner had it for 40k, meaning they have ATLEAST 106k miles on them, but still not a whole lot. I have had a feeling they have been going bad for a while, but trying to not believe it. Lol.
If I have good fuel pressure, I would probably like to get them flow tested and inspected... idk anything else that could be causing the problem other than low compression, but the motor only has 35k miles on it.
Cargo Master
Joined: Nov 2009
Posts: 2,560
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I am not an expert but I would pull the injectors and check all the nozzles. If any are black replace all of the injectors and send a sample of coolant in for testing. If there is diesel in the coolant replace all the cups. But then again I am no expert just based on my experience.
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Senior User
Joined: Oct 2019
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From: Visalia, Ca
I'm not following with the black nozzles, every 7.3 injector I've pulled has had black tips, it's just from combustion I thought? I've even had some with some carbon buildup on them.
When I rebuilt the motor 35k miles ago, they were all flow tested and 3 "failed" so they were replaced with remans from FFD. When all 8 went in, they were known good condition with brand new injector cups and o rings. If any of them are bad, I'm gonna be pissed! 🤣🤣
When I rebuilt the motor 35k miles ago, they were all flow tested and 3 "failed" so they were replaced with remans from FFD. When all 8 went in, they were known good condition with brand new injector cups and o rings. If any of them are bad, I'm gonna be pissed! 🤣🤣
Cargo Master
Joined: Nov 2009
Posts: 2,560
Likes: 20
I'm not following with the black nozzles, every 7.3 injector I've pulled has had black tips, it's just from combustion I thought? I've even had some with some carbon buildup on them.
When I rebuilt the motor 35k miles ago, they were all flow tested and 3 "failed" so they were replaced with remans from FFD. When all 8 went in, they were known good condition with brand new injector cups and o rings. If any of them are bad, I'm gonna be pissed! 🤣🤣
When I rebuilt the motor 35k miles ago, they were all flow tested and 3 "failed" so they were replaced with remans from FFD. When all 8 went in, they were known good condition with brand new injector cups and o rings. If any of them are bad, I'm gonna be pissed! 🤣🤣
If the copper washer has let any combustion past the tip the insides of the injector get cooked and if it happens long enough the cup fails.
That is all.
