'87 944 A/T failed nox emissions
07-13-2004, 01:23 AM
#1
4th Gear
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Join Date: Jun 2001
Location: new york
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'87 944 A/T failed nox emissions
My 1987 944 A/T failed nox emissions in new york state emissions what could cause this. I run sunoco 93 and tried chevron techron what could be the cause and solution??
Steve B
1984 928s ruby red
1987 944 guards red
1988 toyota corolla with 279,000 miles original still runnin!
Steve B
1984 928s ruby red
1987 944 guards red
1988 toyota corolla with 279,000 miles original still runnin!
07-15-2004, 01:21 AM
#2
Drifting
NoX is Nitrides of Oxygen. Excessive Nox is caused by low combustion temperatures. The catalyst is supposed to help reduce the Nox in the exhaust gases. Check the distributor cap/rotor, spark plugs, coil. If those are good/recently replaced, and the spark plugs are the correct heat range. Then you may have a problem with the cat.
Try also posting this on the main 924/931/944/651/968 board as there is much more traffic on that board.
Try also posting this on the main 924/931/944/651/968 board as there is much more traffic on that board.
