94 GT - Codes 172, 176

bob56 · 10-13-2005, 12:04 PM

Codes indicate lean oxygen sensors on both sides. I changed the upper intake gasket, cleaned the MAF, and cleaned the EGR. The check engine light comes on occasionally after accelerating lightly. The car also pings under light load. The pinging and light do not ever happen at the same time. I can't find any vacuum leaks. Where do I go from here? Do I try a new MAF? A new TPS?

All help is appreciated.

Bob

cobra4123 · 10-13-2005, 12:10 PM

could be injectors... try cleanin the maf first...then get the injectors tested

bob56 · 10-13-2005, 12:17 PM

Thanks for the tip! That was one of my thoughts as well. The car is 11 years old and only 40k miles. Things go wrong due to lack of driving.

Bob

cobra4123 · 10-13-2005, 12:33 PM

yea i just had mine rebuilt but the are relatively inexpensive to buy a new set... i had three only runnin at 20% effic

10-13-2005, 12:04 PM	#1 (permalink)
bob56 Junior Member Join Date: Oct 2005 Posts: 2	94 GT - Codes 172, 176 Codes indicate lean oxygen sensors on both sides. I changed the upper intake gasket, cleaned the MAF, and cleaned the EGR. The check engine light comes on occasionally after accelerating lightly. The car also pings under light load. The pinging and light do not ever happen at the same time. I can't find any vacuum leaks. Where do I go from here? Do I try a new MAF? A new TPS? All help is appreciated. Bob

10-13-2005, 12:10 PM	#2 (permalink)
cobra4123 Senior Member Join Date: Apr 2005 Location: Louisville, KY Posts: 826	could be injectors... try cleanin the maf first...then get the injectors tested __________________ Vote for SkylerSVT on Stangette.com...... Just do it........... http://www.mustangtuningforums.com/s...ead.php?t=6045

10-13-2005, 12:33 PM	#4 (permalink)
cobra4123 Senior Member Join Date: Apr 2005 Location: Louisville, KY Posts: 826	yea i just had mine rebuilt but the are relatively inexpensive to buy a new set... i had three only runnin at 20% effic __________________ Vote for SkylerSVT on Stangette.com...... Just do it........... http://www.mustangtuningforums.com/s...ead.php?t=6045

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10-13-2005, 12:17 PM	#3 (permalink)
bob56 Junior Member Join Date: Oct 2005 Posts: 2	Thanks for the tip! That was one of my thoughts as well. The car is 11 years old and only 40k miles. Things go wrong due to lack of driving. Bob