Obs de-fueling - Page 3 - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #21 of 59 (permalink) Old 12-22-2011, 05:42 PM
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Re: Obs de-fueling

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Originally Posted by mjonesjr View Post
I'm not going to argue that it ran them "fine" with the proper tuning. However, to get max potential out of those injectors you need more oil. The stock 15* HPOP barely gets the most out of the stock injectors.
Yeah I'm pretty sure he knows that to get the max out of those injectors he needs a bigger hpop, but at the same time he's not racing it or sled pulling it yet....its a great dd truck that starts right up and gets him where he needs to go.

And remember, he's cat rebel....he doesn't do it the normal way.

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Originally Posted by OBSpstroke97 View Post
Ok just got it off the scanner . On my hot tune at wot oil pressure was at 2500 psi
That's pretty weak.....time for a new pump.

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post #22 of 59 (permalink) Old 12-22-2011, 08:18 PM Thread Starter
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Re: Obs de-fueling

But would that be causing me to lose all my boost and power ? It's almost like I have a big boost leak . The smoke out put is ridiculous at wot

1997 F-250, D60, 8in lift/38s, OUO ladder bars, BTS, Spearco 6.0 IC, SRP 1.1, Irate 468 turbo, Dyno proven tunes, P.I.S 300/200s, ARPs/910s/Smith bros push rods, A1000/sump.

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post #23 of 59 (permalink) Old 12-22-2011, 09:27 PM
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Re: Obs de-fueling

No it wouldn't cause that at 2500 and that is enough to run well enough.

In the vid it sounds like it thinks you are at less than half throttle but if it is still smoking a lot I would look at a huge boost leak for sure, second and not as likely would be low fuel pressure or something wrong with your TPS voltage.

Boost leak is easy to test for so do that first especially if you were getting up to near 40 with no other changes since or the turbo could be getting hammered but you should be able to hear something if that was the case.

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post #24 of 59 (permalink) Old 12-22-2011, 09:44 PM
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Re: Obs de-fueling

K
Quote:
Originally Posted by OBSpstroke97 View Post
But would that be causing me to lose all my boost and power ? It's almost like I have a big boost leak . The smoke out put is ridiculous at wot
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Originally Posted by highfive View Post
No it wouldn't cause that at 2500 and that is enough to run well enough.

In the vid it sounds like it thinks you are at less than half throttle but if it is still smoking a lot I would look at a huge boost leak for sure, second and not as likely would be low fuel pressure or something wrong with your TPS voltage.

Boost leak is easy to test for so do that first especially if you were getting up to near 40 with no other changes since or the turbo could be getting hammered but you should be able to hear something if that was the case.

At wot it should be higher then that.........

And yes a weak hpop would cause that the truck to run like that. Look at it like this, the hpop isn't building enough pressure so its just gonna dump that fuel.

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post #25 of 59 (permalink) Old 12-22-2011, 09:45 PM
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Re: Obs de-fueling

OBSpstroke97 - Have you tried pulling your chip & seeing if it made any change?


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And remember, he's cat rebel....he doesn't do it the normal way.
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post #26 of 59 (permalink) Old 12-22-2011, 10:04 PM Thread Starter
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Re: Obs de-fueling

I'm gonna pull the chip this weekEnd , and the voltage was good to the tps we checked that today on the scanner. Thanks for all the help so far guys

1997 F-250, D60, 8in lift/38s, OUO ladder bars, BTS, Spearco 6.0 IC, SRP 1.1, Irate 468 turbo, Dyno proven tunes, P.I.S 300/200s, ARPs/910s/Smith bros push rods, A1000/sump.

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post #27 of 59 (permalink) Old 12-22-2011, 10:14 PM
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Re: Obs de-fueling

X2-- pull the chip and run on stock tuning. IMO, 2500 psi is not great but ok. What is the duty cycle @ 2500?

It runs up good then just falls back. TPS is an interesting thought and the sudden change could make sense. Dont agree on oil-- if it was oil, it would have done it from day one-- the pump wouldnt fail over night. Electrical stuff fails over night.

Was the tuning written for the injs? perhaps the tuning is not happy...? does it do it in all of the tunes?

To me, if it goes to wot clean on stock tuning and holds it (it should go to 20-23psi), we're getting somewhere to confirming that its not TPS. It should still command 2500 psi on stock tunes as well.

last question, when you installed the d66, did the oring get back on the turbo outlet? check for boost leaks as well.

2000 F250 CCSB-- GT4294R, 250/100s, Dahl/Fuelab, PHP, scan gauge, stock 17* pump

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post #28 of 59 (permalink) Old 12-22-2011, 10:20 PM
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Re: Obs de-fueling

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Originally Posted by countryboyrob View Post
K




At wot it should be higher then that.........

And yes a weak hpop would cause that the truck to run like that. Look at it like this, the hpop isn't building enough pressure so its just gonna dump that fuel.
Not at 2500 PSI and it can't "dump" fuel without pressure but if you mean it wouldn't be optimal as far as atomization well sure.

Now I'm not saying HPO issues won't cause it to run poorly but just not like what he is getting if it is holding 2500 PSI so no need for someone to sell him a pump that might not be the issue.

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post #29 of 59 (permalink) Old 12-22-2011, 11:01 PM Thread Starter
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Re: Obs de-fueling

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Originally Posted by mandkole View Post
X2-- pull the chip and run on stock tuning. IMO, 2500 psi is not great but ok. What is the duty cycle @ 2500?

It runs up good then just falls back. TPS is an interesting thought and the sudden change could make sense. Dont agree on oil-- if it was oil, it would have done it from day one-- the pump wouldnt fail over night. Electrical stuff fails over night.

Was the tuning written for the injs? perhaps the tuning is not happy...? does it do it in all of the tunes?

To me, if it goes to wot clean on stock tuning and holds it (it should go to 20-23psi), we're getting somewhere to confirming that its not TPS. It should still command 2500 psi on stock tunes as well.

last question, when you installed the d66, did the oring get back on the turbo outlet? check for boost leaks as well.
I put the injectors in about a month ago and ran it with no chip for the first 2 weeks and the truck ran great ( I was waiting for the chip in the mail because I got it reflashed ) and as far as the d66 it's been on for about 6 months . I'll check to make sure the o ring isn't messed up this weekend

1997 F-250, D60, 8in lift/38s, OUO ladder bars, BTS, Spearco 6.0 IC, SRP 1.1, Irate 468 turbo, Dyno proven tunes, P.I.S 300/200s, ARPs/910s/Smith bros push rods, A1000/sump.

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post #30 of 59 (permalink) Old 12-23-2011, 12:38 AM
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Re: Obs de-fueling

Can you switch from one tune to the other and get any better results? Thought you said you were just running it on the extreme tune. With my truck on Tonys tunes, I'm not real happy with the extreme files but it runs real well with the race and tow files.

BTW, I've got a small plenum leak but it in no way affects the way the truck runs.

2000 F250 CCSB-- GT4294R, 250/100s, Dahl/Fuelab, PHP, scan gauge, stock 17* pump

1994 F250 4x4 SC (sold)
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