Inline six emmissions
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Inline six emmissions
I've got a 1993 Ford F150 with that six engine.
Is this motor known to emit higher emmisions than most engines ?
Ever since new this one has been right on the edge of failing state inspection and last year would have failed . The mechanic ( my friend ) moved the timing away from factory specs to get it to pass and then moved it back after the test.
It always has ran just fine , though does ping quite a lot when you give it hard throttle ( been doing this since new ) , 152000 mi now.
John..
Is this motor known to emit higher emmisions than most engines ?
Ever since new this one has been right on the edge of failing state inspection and last year would have failed . The mechanic ( my friend ) moved the timing away from factory specs to get it to pass and then moved it back after the test.
It always has ran just fine , though does ping quite a lot when you give it hard throttle ( been doing this since new ) , 152000 mi now.
John..
Fleet Mechanic
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Inline six emmissions
[font size="1" color="#FF0000"]LAST EDITED ON 12-Sep-00 AT 02:44 AM (EST)[/font][p]It really depends on the fuel octane and how recent your tune-up is.
What octane fuel are you using.
My father had an 82 with a 300 and his would ping all day long on everything except 93. So, he eventually had to switch to running the high octane.
What octane fuel are you using.
My father had an 82 with a 300 and his would ping all day long on everything except 93. So, he eventually had to switch to running the high octane.
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Inline six emmissions
My '96 carded a bunch of zero and near zero emissions readings at it's last check. Long stroke engines are inherently cleaner burning and the air pump, cats and EFI take care of the rest. What readings did you miss on, HC, NOx, CO?? They all have different fixes.
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Inline six emmissions
Strangeranger,
HC is the offending emission. Plugs were very clean , makes me think that it's running lean. Also have problem with pinging ( see thread 4.9L ping ).
The engine seems to run fine overall and it hasn't let me down so far . I was just wondering what common things with this motor are apt to cause this or is it just an inherently dirty running engine design as I dn't think it will pass the emission test this time.
The emissions on my lincoln are way under the allowable limit and yet it runs like ##### so it kind of puzzles me why the F150 has so much trouble passing.
John
HC is the offending emission. Plugs were very clean , makes me think that it's running lean. Also have problem with pinging ( see thread 4.9L ping ).
The engine seems to run fine overall and it hasn't let me down so far . I was just wondering what common things with this motor are apt to cause this or is it just an inherently dirty running engine design as I dn't think it will pass the emission test this time.
The emissions on my lincoln are way under the allowable limit and yet it runs like ##### so it kind of puzzles me why the F150 has so much trouble passing.
John
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Inline six emmissions
gustakeout: I once talked with the state inspection official for the Fort Collins, Colorado, area. They have fairly stringent emissions requirements. I told him I had an '84 Ford with the 300 I6 and he said that engine is a "hydrocarbon hog"! Apparently they have had a lot of trouble with that motor.
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Inline six emmissions
TallPall,
It does seem that way .
I just changed the O2 sensor. The tip was bright white with very few deposits after 152000miles. Is this just the factory coating? the new one was the normal brass color.
Is there any way to fool the EEC into running slightly richer? i.e resistor on O2 sensor etc..
I'm very concerned that it won't pass this year.
John
It does seem that way .
I just changed the O2 sensor. The tip was bright white with very few deposits after 152000miles. Is this just the factory coating? the new one was the normal brass color.
Is there any way to fool the EEC into running slightly richer? i.e resistor on O2 sensor etc..
I'm very concerned that it won't pass this year.
John
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Inline six emmissions
gustakeout: Sorry for the delayed response. I have been gone for 2 weeks. Anyway, I can't answer your questions, but am suprised nobody else offered their two cents in the meantime.--Paul
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Inline six emmissions
Paul,
Thanks for the response.
Well I've got 20 days before inspection runs out. Took it to the shop to check exhaust gases. It will fail due to high HC.
No chance of getting this thing fixed.
question , which way do you adjust timing to reduce HC , advance or retard?
and how much should I adjust it from 10 deg initailly?
I can put it back to 10deg after the inspection.
John
Thanks for the response.
Well I've got 20 days before inspection runs out. Took it to the shop to check exhaust gases. It will fail due to high HC.
No chance of getting this thing fixed.
question , which way do you adjust timing to reduce HC , advance or retard?
and how much should I adjust it from 10 deg initailly?
I can put it back to 10deg after the inspection.
John
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Inline six emmissions
Back when the Detroit area (tri county) of Michigan was being tested I remember they would run you at a higher RPM and then suddenly drop you to idle. I failed several times because the truck stuck on the high rpm. As far as adjusting your timing to pass the test, hopefully somebody on this site has experience in that area. It probably wouldn't hurt to have a good tune-up and clean out the throttle body before the test.
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