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I have this 1989 1 ton FI Van and it runs rich? And I have oil in my air fillter is my PCV valve bad? And Frank do you guys do Smog's?
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Ford Van
Running rich
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#2
Billy D. 
- Mud Flows Through My Veins
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Posted 10 August 2009 - 05:09 PM
oil in the Air filter I would say too much blowby. Running rich could be o2 sensor, TPS, choke out of adjustment or sticking, or a pluged air filter
(Caution) I have an 05 wrangler and I'm not afraid to use it
#3
FJ40Rob
- Rig too Tall for Garage
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Posted 10 August 2009 - 05:59 PM
Billy D., on Aug 10 2009, 06:09 PM, said:
oil in the Air filter I would say too much blowby. Running rich could be o2 sensor, TPS, choke out of adjustment or sticking, or a pluged air filter
What causes blow-by? PCV valve? choke on a fuel-injected motor? pluged air filter oil would do that....? When I start it it revs-up real high but it settles down right away...Is my throttle control-valve sticky?
#4
Billy D.
- Mud Flows Through My Veins
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- Group: Trail Hunters
- Posts: 2,013
- Joined: 16-October 05
- Gender:Male
- Location:Paynes Creek
- Interests:off roading , fishing , hunting , and Camping
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Days Off: Sat, Sun, and winter
Posted 10 August 2009 - 06:33 PM
Sorry I wasent thinking fuel injection 
Blowby is caused by worn out rings worn cyclender walls or cracked piston .
Yes the oil on in the filter could do that if the filter cant breath freely there will be less air to fuel ratio also if the oil is going through the filter it will cause it to run rich because of the oil.
It's likely that the Throttle position sensor or the Oxygen sensor is going or is bad
Blowby is caused by worn out rings worn cyclender walls or cracked piston .
Yes the oil on in the filter could do that if the filter cant breath freely there will be less air to fuel ratio also if the oil is going through the filter it will cause it to run rich because of the oil.
It's likely that the Throttle position sensor or the Oxygen sensor is going or is bad
(Caution) I have an 05 wrangler and I'm not afraid to use it
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