Powerloss???
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Freshman User
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Powerloss???
So heres the run down.
1997 F350 CCLB 4x4 7.3l
Just seems to not have what I would expect that it should!
4" straight exhaust stock intake no other after market stuff
No dash lights on
Checked the fuel pressure is about 50-55lbs at idle after a BB and fuel bowl rebuild.
Cleaned the EBP sensor tube, tried the sensor connected and disconected.
tried with ICP connected and disconnected (oil in the connector) I have one comming original ford no less
tried to replace the cam sensor (ran worse)???? Grey looking for a black one.
with it running i unplugged each injector harness and it noticably ran funkier.
idles fairly well, but seems to defuel or bog
boost at idle is 0 cruising on the freeway about 4lbs. heavy throttle in passing gear at about 60 jumps to about 14lbs.
I have a gauge and planned on checking the HPOP pressure but need a few fittings to do so. Also considering MAP but really do not want to throw money away.
Any ideas with out chassing the gremlins for weeks or months?
BTW it is an auto but seems to really shift nice no noticed slips and firmly transitions.
Thanks,
1997 F350 CCLB 4x4 7.3l
Just seems to not have what I would expect that it should!
4" straight exhaust stock intake no other after market stuff
No dash lights on
Checked the fuel pressure is about 50-55lbs at idle after a BB and fuel bowl rebuild.
Cleaned the EBP sensor tube, tried the sensor connected and disconected.
tried with ICP connected and disconnected (oil in the connector) I have one comming original ford no less
tried to replace the cam sensor (ran worse)???? Grey looking for a black one.
with it running i unplugged each injector harness and it noticably ran funkier.
idles fairly well, but seems to defuel or bog
boost at idle is 0 cruising on the freeway about 4lbs. heavy throttle in passing gear at about 60 jumps to about 14lbs.
I have a gauge and planned on checking the HPOP pressure but need a few fittings to do so. Also considering MAP but really do not want to throw money away.
Any ideas with out chassing the gremlins for weeks or months?
BTW it is an auto but seems to really shift nice no noticed slips and firmly transitions.
Thanks,
Senior User
Joined: Oct 2011
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If your fuel pressure is good, and its stock except an exhaust, what are you expecting? Don't take that as me being rude please. Is your truck 4x4? 250 or 350? Dual wheel or single? 3.55 or 4.10 gearing?
They are kinda doggy stock man. The stock downpipe is extremely restrictive, as well as the stock air box.
Have driven any others like yours? I'm just wondering. My 350 dually crew was a dog. My 250 regular cab single wheel with mods is anything but.
More info.
Rich
They are kinda doggy stock man. The stock downpipe is extremely restrictive, as well as the stock air box.
Have driven any others like yours? I'm just wondering. My 350 dually crew was a dog. My 250 regular cab single wheel with mods is anything but.
More info.
Rich
Hotshot
Joined: Dec 2005
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From: evansville in
Theze things stock aint winning no races.it might tip a chassis dyno at 170-190hp.
With that said.mine makes 20lbs boost.BUT i have to hit it just right so revs go up but dont act dumb when it shifts and bog and loose boost.
With that said.mine makes 20lbs boost.BUT i have to hit it just right so revs go up but dont act dumb when it shifts and bog and loose boost.
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F350 Crew 4x4
3" mandrel downpipe. The last powerstroke I drove was also a 97 but it was about 7 years ago and I have owned a stock 2005 Cummins and a semi built 99 Cummins.
So yeah i may have been expecting a little more than "reasonable".
That is exactly the input I am looking for.
I plan on doing the DIY air filter mod and that may wake up and use the exhaust a little better?
Thanks,
3" mandrel downpipe. The last powerstroke I drove was also a 97 but it was about 7 years ago and I have owned a stock 2005 Cummins and a semi built 99 Cummins.
So yeah i may have been expecting a little more than "reasonable".
That is exactly the input I am looking for.
I plan on doing the DIY air filter mod and that may wake up and use the exhaust a little better?
Thanks,
Senior User
Joined: Oct 2011
Posts: 191
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Throw a 6637 on it first. Clean your bowl filter screen, make sure the fuel is decent (I always run diesel clean), check your fuel filter when you clean the screen too. If its got the 3.55 gears that def doesn't help them for brute power feeling.
So it's a one one ton 4x4 with exhaust. Can't expect much, its a heavy old pig.
How many miles? Do a little checking around and maybe swap some fluids and filters, cheap enough. Make sure your fueling system is clean.
A tuner and some boom sticks will wake that thing right up assuming everything else is in order.
And it didn't help that your were driving a newer cummins which is just way more power than our old trucks too.
So it's a one one ton 4x4 with exhaust. Can't expect much, its a heavy old pig.
How many miles? Do a little checking around and maybe swap some fluids and filters, cheap enough. Make sure your fueling system is clean.
A tuner and some boom sticks will wake that thing right up assuming everything else is in order.
And it didn't help that your were driving a newer cummins which is just way more power than our old trucks too.
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24v cummins runs much better stock for stock than an obs 7.3....that being said I wouldn't trade mine for one
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I cleaned the fuel screens when I rebuilt the bowl.
Thats the input i was looking for. I am ok not being a racer. Just wanted to make sure it was running correct.
Plans include
fresh fluids
intake mod
6 position chip
to start then.
thanks
Thats the input i was looking for. I am ok not being a racer. Just wanted to make sure it was running correct.
Plans include
fresh fluids
intake mod
6 position chip
to start then.
thanks
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so I disconnected the MAP and no big difference. Then at lunch I also dicsonnected the ICP sensor.
And WOW.... Did it wake it up. It actually was barking the 36's with the auto from a stand still.
It does seem like the top end is still a dog though. Probably because it is running on both default values for the MAP and HPOP pressure.
I will kepp you posted.
thanks for the input.
And WOW.... Did it wake it up. It actually was barking the 36's with the auto from a stand still.
It does seem like the top end is still a dog though. Probably because it is running on both default values for the MAP and HPOP pressure.
I will kepp you posted.
thanks for the input.
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So I got a new ICP installed now with the MAP connected or disconnected it seems to run the same.
It is much better than before so I think that the ICP was the culprete. So i think that the next couple things are a Water/Methanol injection kit and a 6 postchip. Gauges obviosly or monitoring computer (thoughts? want, boost, EGT, tranny temp, HPOP would also be great)
BTW got the HPOP gauge on and it looks like about 750 at warm start up however could not measure at speeds. But from what I read 750 should be good low seems to be in the 500's? Thoughts?
should satisfy my desire to feel the power when towng for now.
Anybody know if the speedo calibration being off can change how a truck drives? I mean does the speedo effect other sensor functions on the motor and tranny?
Thanks
PS I know it a lot. Just looking for expierienced input and where better to get it.
It is much better than before so I think that the ICP was the culprete. So i think that the next couple things are a Water/Methanol injection kit and a 6 postchip. Gauges obviosly or monitoring computer (thoughts? want, boost, EGT, tranny temp, HPOP would also be great)
BTW got the HPOP gauge on and it looks like about 750 at warm start up however could not measure at speeds. But from what I read 750 should be good low seems to be in the 500's? Thoughts?
should satisfy my desire to feel the power when towng for now.
Anybody know if the speedo calibration being off can change how a truck drives? I mean does the speedo effect other sensor functions on the motor and tranny?
Thanks
PS I know it a lot. Just looking for expierienced input and where better to get it.
Hotshot
Joined: Dec 2005
Posts: 14,377
Likes: 609
From: evansville in
um,I was rereading your post here.I may be crazy but with your regulator shimmed that pressure seems a bit low.I only very slightly shimmed mine from 50 stock to 60 with a trim nail cut off and turned uside down.My fuel pump is only a few thousand miles old.
How old is your fuel pump? Im not saying it is your ultimate problem but it could be getting weak im thinking.
How old is your fuel pump? Im not saying it is your ultimate problem but it could be getting weak im thinking.
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