If the exhaust back pressure sensor is bad or clogged will it give poor fuel milage or black smoke.I have a DP tuner chip 40hp tow and 80hp economy.My milage is 15.5 on tow and 16 on econo.

2002 F250 crew cab auto 3.73 rear,tymar,dp chip,isspro gauges,4" magnaflow exhaust.

 

I do believe the EBP system only comes into play when the PCM determines
it's cold enough from it's sensors.

 

15.5 and 16 doesnt sound bad for a 7.3 imo........

 

That's a good mileage for mixed driving. Pure highway should net more. I've seen 22mpg on pure highway driving.

Nut

 

however i do belive that the EBP sensor is somehow tied into the MAP sensor. there is probably a set table ratio, where EBP is x, the MAP should be y. remember back when the Spring Fling only netted Cat Man 963 about 220 hp? it was an EBP sensor. my guess is that the sensor was not sensing anything, so it defueled so that the boost would be y when x was very low. try cleaning out the tube and sensor, and get back at us....

 

Kris,
In this case i think your thinking about the MAP sensor. The EBP and EBPV only come into play in cold weather for engine warm up. The MAP sensor picks up boost levels.
Nut

 

the exhaust backpressure actuation solenoid (typically labeled "sensor") on the turbo pedestal has no correlation to the Exhaust backpressur sensor that is on the end of the tube coming from the right exhaust manifold behind the HPOP resi.

i do believe Chad was having problems of not registering an exhaust backpressure number, not having his EBPV close. there was no hissing, i was there staring at the flex pipe that had NO smoke come out of it. hah now i remember, he doesnt even have an EBPV to close.

my guess in the post above was that the EBP "pressure sensor" was not seeing anything (or reading low), and it was defueling the engine because the MAP and EBP readings were out of range. that is what i think i thought of back in April when this problem happened.

 

Yep - my problem was a faulty Exhaust Backpressure Sensor "code eliminator".... I have no idea what kind of reading it was giving the PCM to make it run the way it was. But Kris is right - my truck was getting nothing for fuel - barely blew a gray haze on the dyno...

WISH I woulda thought to take the @#%!*% thing off while I was ON the dyno - but I guess there is always next time... BACK to the issue at hand...

The tube from the manifold - to the sensor - can get clogged with soot.... BUT!!! In JTHarvey's findings - I am almost SURE he is running his stock sensor totally hanging out in the open - not even connected to the manifold tube. That would give the same results as a plugged up tube - so I don't know what to think...

I wonder if it's a MAP sensor problem and not the EBPS at all??? MY problem eliminated my smoke... and DIDN'T effect my milage either.... I'm gonna vote for some other problem than the EBP Sensor

 

Yes I am - well the end is actually capped off, but either way it doesn't see any pressure from anything. Been running it like that for about a month or so now, and it was like that when I had it on the BTS dyno earlier in the month. Power seems to be good & the smoke is black.