Emissions problem- running rich
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Emissions problem- running rich
I have an '02 F250 Super Duty which had to pass emissions here in Az for the first time this year, and unfortunately it failed. The emissions tech told me the vehicle was running rich, and thought maybe I had a chip in it.
The truck is not chipped, and has no performance mods of any sort. The only service issues the motor has had since I bought it were a bad camshaft position sensor and bad fuel pump (both of which were replaced of course). The engine does not throw any trouble codes.
I'd really appreciate suggestions about how to troubleshoot this, any common causes I could look into, or any other thoughts on the subject.
Thanks!
The truck is not chipped, and has no performance mods of any sort. The only service issues the motor has had since I bought it were a bad camshaft position sensor and bad fuel pump (both of which were replaced of course). The engine does not throw any trouble codes.
I'd really appreciate suggestions about how to troubleshoot this, any common causes I could look into, or any other thoughts on the subject.
Thanks!
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
EOT= Engine oil temperature.
Check all of the boots going from the turbo outlet, to the intercooler, and back up to the engine. There are 6 boots total, each one has two clamps. Tighten up the boots and see what happens.
Check all of the boots going from the turbo outlet, to the intercooler, and back up to the engine. There are 6 boots total, each one has two clamps. Tighten up the boots and see what happens.
Postmaster
Joined: Jun 2006
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From: Fulltime RVer
How did they run the truck for this emissions test? For example, in CA they run it up on a dyno, in other states they just shove a probe up the tailpipe, and in others they check the PCM? Did they cite any ppm #'s, like for NOx?
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Joined: Mar 2005
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From: Hoschton,GA
Jody and I just finshed discussing this issue you have posted about. What can I say it's date night. 
Anyway....
You said it's not throwing any codes, but I think it is an injector stuck open. Jody said possibly because you won't always get codes with injector issues. Usually there needs to be internal issues for them to show up. The reason I think this is because it is over fueling even with out the presense of a tuner. Hook up to a good ford scan tool (i.e. IDS, NGS or AE) to see what shows up.
Look for your normal ICP at idle with a stock truck to be around 580psi.
Hope this helps.
Diane
Anyway....
You said it's not throwing any codes, but I think it is an injector stuck open. Jody said possibly because you won't always get codes with injector issues. Usually there needs to be internal issues for them to show up. The reason I think this is because it is over fueling even with out the presense of a tuner. Hook up to a good ford scan tool (i.e. IDS, NGS or AE) to see what shows up.
Look for your normal ICP at idle with a stock truck to be around 580psi.
Hope this helps.
Diane
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Post Fiend
Joined: Feb 2007
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From: Dallas-Ft. Worth
Originally Posted by DP-Tuner
Jody and I just finshed discussing this issue you have posted about. What can I say it's date night.
///SNIP///
Diane
///SNIP///
Diane
Joe
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Postmaster
Joined: Jun 2006
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From: Fulltime RVer
Originally Posted by Izzy351
How cool is that?? A couple goes out on a date and they discuss how trucks run and theories for an issue on FTE... Man, I wish MY date night was like that.... Joe
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Brett Foote
Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by FearTheDentist
I have an '02 F250 Super Duty which had to pass emissions here in Az for the first time this year, and unfortunately it failed. The emissions tech told me the vehicle was running rich, and thought maybe I had a chip in it.
The truck is not chipped, and has no performance mods of any sort. The only service issues the motor has had since I bought it were a bad camshaft position sensor and bad fuel pump (both of which were replaced of course). The engine does not throw any trouble codes.
I'd really appreciate suggestions about how to troubleshoot this, any common causes I could look into, or any other thoughts on the subject.
Thanks!
The truck is not chipped, and has no performance mods of any sort. The only service issues the motor has had since I bought it were a bad camshaft position sensor and bad fuel pump (both of which were replaced of course). The engine does not throw any trouble codes.
I'd really appreciate suggestions about how to troubleshoot this, any common causes I could look into, or any other thoughts on the subject.
Thanks!
I am emission certified in WA state and the language that you are using is for a gas engine.
Diesels are tested for opacity not for fuel/air ratio.
What engine does your truck have?
Junior User
Joined: Jun 2007
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Originally Posted by Kwikkordead
Something is not right.
I am emission certified in WA state and the language that you are using is for a gas engine.
Diesels are tested for opacity not for fuel/air ratio.
What engine does your truck have?
I am emission certified in WA state and the language that you are using is for a gas engine.
Diesels are tested for opacity not for fuel/air ratio.
What engine does your truck have?
"hmmm...thinkin' the "finger around my tailpipe" comment didn't come out right"
Oh well...
, now thats funny
New User
Joined: Jul 2007
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i would check youre ECT sensor that is youre engine coolant temp. sensor if that sensor goes bad youre fool ratio will start akting up eather too rich or not enough it doesnt heart to check this out it s located next to the thermastat good luck let us know what happens HD
Laughing Gas
Joined: Jul 2003
Posts: 1,157
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From: Littleton, Colorado
Here in Colorado they also do e-tests. They run 'em on a dyno and test the exhaust's opacity. Takes 'em 5 min. for $69 and the shop requires appts as they are busy nonstop. Definitely a profitable machine.
Austin
Austin
Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by AustinS
Here in Colorado they also do e-tests. They run 'em on a dyno and test the exhaust's opacity. Takes 'em 5 min. for $69 and the shop requires appts as they are busy nonstop. Definitely a profitable machine.
Austin
Austin
Laughing Gas
Joined: Jul 2003
Posts: 1,157
Likes: 1
From: Littleton, Colorado
Originally Posted by Kwikkordead
I see. And a diesel engine will smoke more at 7000ft than at sea level Seattle too.
It does sound like he's talking about a gasser.
Do you guys have the same or similar parameters on diesels as we do?
They lug test it on a dyno at 60,50,40 and 0 mph.
Then they check crankcase vent, and electronic engiine controls.
I don't know what the limits are, but mine passed at : 2% at 60 mph,
0% at 50 mph, 3% at 40 mph and 0% at zero.
Austin