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The truck turns over but won't start on occasion, like the ignition isn't firing . It only does it now and then but I don't want to get stranded .Is there a test to check the key, when it does it the theft light stays on.
having trouble , cleared code p0174 found vacuum leak , changed all 4 o2 sensors, cleaned MAF sensor and now getting code p1151. I checked all o2 sensor plugs , found 1 problem,1 plug was not tight, I corrected, but I'm still getting the code. the Truck runs better then new but won't pass smog test.i read somewhere about possible plugged injectors and or broken wires.
I changed all O2 sensors, cleaned the MAF sensor and checked for vacuum leaks.Is there a test to check the MAF sensor? The truck still runs rough at idle and pings every now and then. Please help.