2000 Ford Ranger CODES PO135 & P1131

2000 FORD RANGER
207,178 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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BROCKNROLL5
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  • 1 POST
I keep getting these codes I have replaced spark plugs, both 02 sensors,maf sensor , water pump, thermostat and housing, air filter, I have checked for air leaks in hoses and manifold it runs good I have no lose of power and there are no gas smells but obd is telling me that its lean got any ideas
Nov 27, 2013 at 6:26 PM
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HMAC300
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  • 48,601 POSTS
check fuel pressure with a gauge it may be low causing this.also check for a plugged or non working egr system, air leaks after maf system and before O2 sensors and any vacuum leak or pcv system also if dipstick isn't sealing right.
Nov 28, 2013 at 5:05 AM