Hydro Carbons Emission Test Question
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Joined: Jan 2003
Posts: 97
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From: Welland.Ontario Canada
Car: 1988 Formula 350
Engine: 350
Transmission: 700R
Axle/Gears: 9 Bolt...3:27
Hydro Carbons Emission Test Question
Times are tuff here with emissions. Passed okay but my HydroCarbons are just making it.
I moved my relocated MAT sensor by the headers for the test and that helped a bit.
My question......running 50 psi fuel pressure right now..if I dropped it back to say 40-43 psi at testing time; will this reduce the HC?
The cat. convertor has only about 8000 miles on it.
NEED ALL THE ADVISE I CAN GET!!!!!
The supid gov't tigthens up the requirements every 2 years and the car is getting older....This is the govt's answer to emissions..get rid of the older ones and only drive new ones!!!!!
There goes any future mods
I moved my relocated MAT sensor by the headers for the test and that helped a bit.
My question......running 50 psi fuel pressure right now..if I dropped it back to say 40-43 psi at testing time; will this reduce the HC?
The cat. convertor has only about 8000 miles on it.
NEED ALL THE ADVISE I CAN GET!!!!!
The supid gov't tigthens up the requirements every 2 years and the car is getting older....This is the govt's answer to emissions..get rid of the older ones and only drive new ones!!!!!
There goes any future mods
Joined: Mar 2000
Posts: 43,187
Likes: 45
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
That's common liberal-think. No connection to reality, but a lot of dependance upon feel-good. Since newer cars are required to be cleaner, it feels right to reduce pollution by eliminating older cars, with no regard to the natural attrition that does that, anyway.
Ok, end of rant.
High HC's are caused by unburnt fuel getting to the exhaust. That is typically indicative of a a misfire rather than a rich mixture (which would drive up CO). So, make sure the ignition system is up to snuff, and that you don't have any leaking exhaust valves. A cam with high overlap will also raise HC's.
Ok, end of rant.
High HC's are caused by unburnt fuel getting to the exhaust. That is typically indicative of a a misfire rather than a rich mixture (which would drive up CO). So, make sure the ignition system is up to snuff, and that you don't have any leaking exhaust valves. A cam with high overlap will also raise HC's.
Thread Starter
Junior Member
Joined: Jan 2003
Posts: 97
Likes: 0
From: Welland.Ontario Canada
Car: 1988 Formula 350
Engine: 350
Transmission: 700R
Axle/Gears: 9 Bolt...3:27
Originally posted by five7kid
That's common liberal-think. No connection to reality, but a lot of dependance upon feel-good. Since newer cars are required to be cleaner, it feels right to reduce pollution by eliminating older cars, with no regard to the natural attrition that does that, anyway.
Ok, end of rant.
High HC's are caused by unburnt fuel getting to the exhaust. That is typically indicative of a a misfire rather than a rich mixture (which would drive up CO). So, make sure the ignition system is up to snuff, and that you don't have any leaking exhaust valves. A cam with high overlap will also raise HC's.
That's common liberal-think. No connection to reality, but a lot of dependance upon feel-good. Since newer cars are required to be cleaner, it feels right to reduce pollution by eliminating older cars, with no regard to the natural attrition that does that, anyway.
Ok, end of rant.
High HC's are caused by unburnt fuel getting to the exhaust. That is typically indicative of a a misfire rather than a rich mixture (which would drive up CO). So, make sure the ignition system is up to snuff, and that you don't have any leaking exhaust valves. A cam with high overlap will also raise HC's.
I have a Accel 300+ box and coil...8.8 mm wires and the car pulls hard with no misfire..
No cam...
I have about 50,000 miles on the car and at start up; I do have the IMFAMOUS puff of blue smoke at start up..but not too bad.It seems from your reply I will have to get the valve seals done now
Thanks for the reply..
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