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#1
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Tracker emissions - Help!
My 91' Tracker failed emissions badly today...
As I'm selling it, I've gotta make it pass. Basically failed on all 3 specs - NOx, CO, and HC... My first thought is either the o2 sensor, or the cat...since there's really little else (from my perspective, anyhow) to go wrong on these engines, emissions wise. I did change the plugs before the test, changed the oil and air filter, and checked everything over..but still, a miserable failure. Anyone have any related experience with Tracker / Sidekicks and emissions problems? What's the most common problem emissions wise for a 3-point failure like this? I'm most apt to try with just an o2 sensor to begin with, and go from there...as I do suspect its overdue for one...but no SES light at this point, though. Cat may also be suspect... Any suggestions / help appreciated. I suspect changing the o2 and cat together will result in a pass, which is all I need to get rid of the truck, but any other insight appreciated regardless.. Reply here, or email me (Remove the obvious spamtrap before replying via email) Thanks...Mark. |
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#2
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What's the mileage? If it's high, a new O2 sensor is probably a good call in
any case. The converter is more iffy however, it may or may not be bad. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from Home Page: http://www.roberthancock.com/ "Mark" > wrote in message om... > My 91' Tracker failed emissions badly today... > > As I'm selling it, I've gotta make it pass. > > Basically failed on all 3 specs - NOx, CO, and HC... > > My first thought is either the o2 sensor, or the cat...since there's > really little else (from my perspective, anyhow) to go wrong on these > engines, emissions wise. > > I did change the plugs before the test, changed the oil and air > filter, and checked everything over..but still, a miserable failure. > > Anyone have any related experience with Tracker / Sidekicks and > emissions problems? > > What's the most common problem emissions wise for a 3-point failure > like this? > > I'm most apt to try with just an o2 sensor to begin with, and go from > there...as I do suspect its overdue for one...but no SES light at this > point, though. > > Cat may also be suspect... > > Any suggestions / help appreciated. I suspect changing the o2 and cat > together will result in a pass, which is all I need to get rid of the > truck, but any other insight appreciated regardless.. > > Reply here, or email me > > (Remove the obvious spamtrap before replying via email) > > Thanks...Mark. |
#3
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What's the mileage? If it's high, a new O2 sensor is probably a good call in
any case. The converter is more iffy however, it may or may not be bad. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from Home Page: http://www.roberthancock.com/ "Mark" > wrote in message om... > My 91' Tracker failed emissions badly today... > > As I'm selling it, I've gotta make it pass. > > Basically failed on all 3 specs - NOx, CO, and HC... > > My first thought is either the o2 sensor, or the cat...since there's > really little else (from my perspective, anyhow) to go wrong on these > engines, emissions wise. > > I did change the plugs before the test, changed the oil and air > filter, and checked everything over..but still, a miserable failure. > > Anyone have any related experience with Tracker / Sidekicks and > emissions problems? > > What's the most common problem emissions wise for a 3-point failure > like this? > > I'm most apt to try with just an o2 sensor to begin with, and go from > there...as I do suspect its overdue for one...but no SES light at this > point, though. > > Cat may also be suspect... > > Any suggestions / help appreciated. I suspect changing the o2 and cat > together will result in a pass, which is all I need to get rid of the > truck, but any other insight appreciated regardless.. > > Reply here, or email me > > (Remove the obvious spamtrap before replying via email) > > Thanks...Mark. |
#4
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try carb rebuild and adjust timing
Robrt White |
#5
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try carb rebuild and adjust timing
Robrt White |
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