code 44
#1
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code 44
i have a 1989 gmc r3500 with a 454 that giving me a code DTC - 44. so far ive replaced the fuel pump and the o2 sensor and cleaned the egr valve.i was wondering if you guys think it could be the fuel pressure regulator or a vac leak?i was also think about blocking off the egr vac line and seeing what it does.
#2
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Unfortunately lean codes can be tons of things. Fuel pressure goes down when the pump goes or anything wrong with the connection or ground. Any air leak. You can use carb cleaner to check for leaks
#3
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i check for air leaks and i found none.i was thinking could the coolant temperature sensor cause that code.so far im leaning towards the fuel pressure regulator.
#6
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#7
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the ect does cause fueling issues you can test it;
o2 normally has different codes. you can check pressure but you have to get something to tee it off. if the pressure falls off quickly the regulator is bad. if its not over 10 something with the pump or filter or wires
o2 normally has different codes. you can check pressure but you have to get something to tee it off. if the pressure falls off quickly the regulator is bad. if its not over 10 something with the pump or filter or wires
#8
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the ect does cause fueling issues you can test it;
o2 normally has different codes. you can check pressure but you have to get something to tee it off. if the pressure falls off quickly the regulator is bad. if its not over 10 something with the pump or filter or wires
o2 normally has different codes. you can check pressure but you have to get something to tee it off. if the pressure falls off quickly the regulator is bad. if its not over 10 something with the pump or filter or wires
#10
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