got a problem 97 f350 failed emission test. tech says burning to rich at low speeds 0-40 mph blowing black smoke. clears out after 40 mph. took to mechanic first tells me egr is bad and replaces it. still failed emission test. now he tells me waste gate and waste gate solenoid needs to be replaced. i have my doubts he knows what he is talking about. if i am easy on the throttle during upshifts, it will blow a little black smoke. medium on up peddle will produce a nice black cloud. i did disconnect the map sensor and plugged vaccuum line and the smoke cleared up through the whole driving range. bought a new map sensor and vaccuum line and replaced but it still smokes. am i on the right track ? truck runs strong and gets good mileage 16-17 in town. has 190,000 miles on it. going to take a trip to montana and the dakotas next month but need to pass the emission test here in denver co. so as to get reg. tags. anone have any ideas that i can try or same experiences? any advise would be appreciated. thank you:
failed emissions
- Thread starter fordfast
- Start date
roosterdiesel
Earl needs B100
Ummm....the OBS trucks don't have a wastegate or WG solenoid, and to my knowledge they don't have an EGR valve either.
Try another place to pass emissions if there's one available.
Try another place to pass emissions if there's one available.
bad_bad_bubba
Full Access Member
I'm just glad we dont have to go though enissions here.........Yet.
budtoh3zo
Full Access Member
Only the new 6.0L have EGR valves and 1994-1997 PSD dont have wastegates. Hows ur air filter and fuel filters? change your oil recently? No emmison test here eather. Dont they have a sniffer? all older diesels will puff some black smoke. By any chance do you have a chip or programmer in it?
budtoh3zo
Full Access Member
that would reduce black smoke. Black smoke is to much fuel not enough air.
roosterdiesel
Earl needs B100
I forgot to say welcome to SDD!
How are they testing? I thought diesel test was an "opacity test" where a light is shined through the exhaust thats coming out of the tail pipe. How's he doing that at 40 MPH?
How are they testing? I thought diesel test was an "opacity test" where a light is shined through the exhaust thats coming out of the tail pipe. How's he doing that at 40 MPH?
budtoh3zo
Full Access Member
could be on rollers? But in Canada they never put cats on tell 2003
