failed emissions - big time!
#32
#33
Also, I just noticed the rubber hose from the oil tube to the air intake housing was kinked real bad.
And finally, there is something like an air diverter or something (between the throttle body and the coil) that has an air outlet that does not have a hose going to it. Is there supposed to be a hose? Does it go to the air intake houseing? I don't have the stock housing, the PO put a K&N system on. I was thinking about tee-ing that in with the hose coming from the oil tube to the air intake housing.
And finally, there is something like an air diverter or something (between the throttle body and the coil) that has an air outlet that does not have a hose going to it. Is there supposed to be a hose? Does it go to the air intake houseing? I don't have the stock housing, the PO put a K&N system on. I was thinking about tee-ing that in with the hose coming from the oil tube to the air intake housing.
#34
<p>If the thing thinks it's lean, it's going to richen up the mix as far as it can.</p><p>That brings us back the the MAP sensor setup, which I believe uses throttle position and the MAP sensor to figure this out? Help me out here guys, it's been a while since I even opened the hood on a MAP-equipped vehicle <img alt="Evil Grin" src="https://www.ford-trucks.com/forums/images/smilies2/evilgrin0007.gif" style="height:19px; width:21px" title="Evil Grin" /></p>
#35
#36
<p>If there was a vacuum leak causing it to actually run lean, it wouldn't have such high HC and CO numbers.</p><p>It can't be both running rich (HC and CO) AND report lean condition from the O2 sensor at the same time.</p><p>Are there two O2 sensors and one bank is dumping gas, and the other side is running lean?</p><p> </p>
#37
#38
I may of missed this but what engine and size?
My 1995 F250 with a 351 had 2 or 3 O2 sensors. It would test out as a bad sensor and replacing
then did nothing to solve that problem. Sadly I never fixed it do to totaling it shortly after that.
Sean
6.0L Tech Folder
#39
#40
I Just measured the vacuum at the manifold at 19-20 during idle and a little higher at 2000 RPM. Does this mean I can assume my vacuum lines are good?
I pulled off the hose from the throttle body to the EVAP canister purge solenoid (this was brittle and cracked) and the vacuum dropped. Like I stated before, I will replace all the EVAP hoses but it didn't seem to affect the vacuum while it was connected.
What next?
I pulled off the hose from the throttle body to the EVAP canister purge solenoid (this was brittle and cracked) and the vacuum dropped. Like I stated before, I will replace all the EVAP hoses but it didn't seem to affect the vacuum while it was connected.
What next?
#42
Having to think back to before 2000 and I am starting to
have some things come back. My truck did have 2 O2 sensors
and did not have Mass Air flow.
Now mind you the truck came down from Canada.
But I do recall replacing all 3 of the O2 sensors on that one do to the cost
and locations
Sean
6.0L Tech Folder
have some things come back. My truck did have 2 O2 sensors
and did not have Mass Air flow.
Now mind you the truck came down from Canada.
But I do recall replacing all 3 of the O2 sensors on that one do to the cost
and locations
Sean
6.0L Tech Folder
#43
If the EVAP lines are cracked I can guarantee the other vacuum lines are cracked. Replace all of them.
#44
Having to think back to before 2000 and I am starting to
have some things come back. My truck did have 2 O2 sensors
and did not have Mass Air flow.
Now mind you the truck came down from Canada.
But I do recall replacing all 3 of the O2 sensors on that one do to the cost
and locations
Sean
6.0L Tech Folder
have some things come back. My truck did have 2 O2 sensors
and did not have Mass Air flow.
Now mind you the truck came down from Canada.
But I do recall replacing all 3 of the O2 sensors on that one do to the cost
and locations
Sean
6.0L Tech Folder
1995 F250HD/350 Engine Control w/MAP & 1 O2 Sensor
#45
It did have more than one.
However we are getting way off track here with this little debate.
Sean
6.0L Tech Folder