I have a 99 F-250, 6 speed. In the last year here is the list of new parts.

engine from jasper
turbo with banks wheel
stock injectors all 8
injector driver module
thermostat 192


Long story please be patient

After I installed the new engine and injectors put about 3k miles on... Ran ok, but not quite all there, Check engine light on and off...

Blew the turbo, about time had 200k on it

put the new turbo on when i got the money and it has not ran right since.
had check engine light all of the time and wouldn't run good enough to go down the road.

took it to the dealer, they replaced the module. now it runs and drives. absolutely no codes... won't go over 70MPH... took it back they drove it said it isn't getting warm ever, put in a new stat, 192 F. Then the tech told me to my face that it runs great i just have to put some cardboard in front of the radiator so it will warm up. or wait until the water temp is above 150. It is cold here and I drove around all day with a grille packed full of ice and snow, got the water temp to 185F still won't get out of it's own way.

plugged in my diablosport to see if i could figure anything out...
everything looks pretty normal except at idle the manifold pressure sensor bounces between 0 and infinity... and no matter how i drive it, the fuel level in reads 0 and the fuel dump always reads 100%

I really hope somebody has a clue or two.

Thanks,
Jason

 

First off, welcome. Any aftermarket mods done? Intake?

 

Welcome to FTE. Great place.

Barry, where did I get my 203* stat with the Billet housing? I think that might help with the temp. I can't find the sponser that has them.

 

Not sure, several sponsors have gone lately. Pure Diesel Power had a lot of stuff like that and I have delt with them. Garrett is a good guy to work with.

 

Jason, Welcome to

203° Thermostat at DIESELSITE

There is probably more to it than just needing a thermostat. What kind of temperatures are you driving in.

Could be a bad EOT sensor making the PCM think the truck is always cold and defueling. It would be nice to check EOT with a scanner.

And I don't understand this part of your post......and no matter how i drive it, the fuel level in reads 0 and the fuel dump always reads 100%

And what module was replaced, the PCM or the IDM?

You also said "had check engine light all of the time" Did the stealership see any codes? If so what are they?

 

No real mods. I have a diablosport, but i am not running it. I did a redneck cold air. No intake air heater and it has the "banks" wheel in the turbo, the shop i picked it up at didn't have any "stock" turbos. I have a 203 stat on the way, i really don't think that will do it though. it used to run like a race car as long as it was warm (175 water temp) or above. and even with a grill packed full of snow and the gauge reading 180 and up and it still won't go over 70.

Are the numbers from my Diablosport for 100% fuel dump and 0% fuel in normal? It is snowing like crazy and temps in the uppers 20's so I can't get any WOT runs without spinning tires, but i drove it for 10 mins or so through different throttle inputs and never moved off of 100% and 0%
(This info is from my diablosport fuel page)

no, stealership didn't give me any codes. they replaced the IDM.


Thanks for the welcomes. I am thinking fuel problem, what should i look for if i put a fuel pressure gauge on it.

 

The PCM estimates EOT if there is a problem with the sensor ,,It could have an effect on performance ,,
From the manual :

An Engine Oil Temperature signal detected out of range, high or low, by the PCM will cause the PCM to assume an engine oil temperature of 20° C (68°F) for starting purposes and 100° C (212°F) for operating purposes. The Malfunction Indicator Lamp in the instrument cluster will be illuminated as long as the fault condition exists.





I would also unplug the Map sensor ,,see if it improves ..

 

The book says 53 PSI at idle. What you really need to look at is fuel pressure under load to see if it drops and how much.

I do not know what Diablo means by 100% and 0% .

Are you getting a lot of injector knock. That is a symptom of fuel starvation.

 

Try unplugging your MAP sensor and see if that makes a difference.

You won't get any accurate fuel readings on these trucks with a scanner except for injector pulse width. The factory system has no way to monitor the amount of fuel the the motor compared to what's returned to the tank.

 

This could explain CEL on all the time. I would believe that the CEL would be on whenever the PCM is using a default map for whatever reason.

Only being able to hit 70MPH the factors to consider are, not enough fuel(fuel restriction or weak fuel pump) not enough air(dirty air filter or intake restriction), exhaust restriction causing high EBP reading(could that cause PCM to use a default fueling table?), not enough ICP (IPR or ICP).

Throwing out some ideas to get some more ideas.

And thanks Chris. Now I know, or think I do, what that Diablo fuel reading is about.

 

The fact that your map is bouncing from zero - infinity makes me think you may have a bad map sensor...at idle it should read normal air pressure (for me at 800ft above sea level it reads about 14.5 psi) the fact that yours reads 0 or infinity, makes me think there is a wiring problem or a bad map sensor - like stated above - try unhooking it to see if it will run better when the PCM defaults
Hope this helps,

 

Thanks for the many suggestions, but let me make this clear since i think at least a couple of you didn't catch the title.

I don't have a Check Engine Light ever. Runs all day without the light, except when i key it up to start.

I will unplug the MAP today and see how it works, but off idle it works like it should.

fuel filter is brand new and it seemed like when i replaced it the truck ran a little better for maybe 15 miles or so.

does anybody know what that crap means on my diablo sport??? or at least what sensor it is reading from and what it should be???

thanks again

 

Did you post up on the Diabolosport forum and ask? Someone there should be able to help you with the info there.

My guess is you have the U7170 tuner. If anything like mine, an older model with smaller memory. They want $99.00 to upgrade the memory so you can download the latest tunes. One of the guys there did it, and they charged $23 and change for S&H!!

My advice to you:
1. Ask questions on Diabolosport forum, either in the Ford Diesel, or the CMR/Dataviewer section to find out what you are reading. Work from there.
2. Do NOT spend the money to upgrade the tuner. Save it towards DP Tuner!!

And before I forget my manners: Welcome to FTE!!!

 

I noticed the title ,, & have heard it before ,,I haven't heard anything about the diablo capabilities ,

If you are not using a professional scanner of some type,Snap on ,AE, Dealership , ect,, most times ,the important ones can be unattainable..

If the truck ran better with a new filter ,you may need to set up a pressure guage to see what is actually happening ..Although , low fuel pressure can set a light too,, but by then , the truck would have fallen on its face ...

Was that the IDM ?

Can your predator read ICP ?....

 

dsquared, thanks, that is probably the best tip so far for me... going to check out the diablosport forum now...

as far as some of the others. unplugged the map today and the truck drove just about the same, did set the light though. unfortunatly my ignorance cleared them without writing them down. but i can drive again... and post tomorrow. and the MAP bouncing from 0-inf. is either a wiring problem or an anomaly with that diablosport as it bounced from 0-inf. the entire time it was unplugged.

I was unaware that the info on the diablosport was so different, i guess i will have to drag the snap on scanner out there tomorrow. so now that we will be talking on the same page hopefully, what information will be helpful???