Need engine help!
07-12-2012, 11:34 PM
#1
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Need engine help!
hey guys i have an 02 f150 with a 4.6 and when im accelerating i can hear almost like a back fire and popping almost like a misfire sometimes the harder u romp on it the better it gets other times it hesitates and shakes truck on the highway i can set the cruise at 110km/h and it does the same thing until i take it off ive checked my codes the only thing that pops up is the code for my o2 sensor cause of having no catelytic converters, i changed the spark plugs and 2 of the boots that were cracked didnt help also i had truck running and i disconnected one injector at a time to see if i had a bad coil on one cylinder didnt tell me nothing what else could cause this? the truck has a cold air intake,throttle body spacer and dual exhaust it did it before i put the the cold air and tb spacer on any help is greatly appreciated. thanks
07-15-2012, 02:13 PM
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it hooked it up to a code reader again and it said misfire cylinder 8 so i pulled that coil out checked plug and took the number 1 coil out put it on cylinder 8 and put the 8 one on the 1 to see if would throw a misfire for that cylinder to rule out the coil and now ive got no misfire code and the truck still runs bad. I was getting a code po115, and po155 i have no idea what they are, would a fuel filter cause a problem like this? again thanks for all the help
07-16-2012, 07:50 AM
#5
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Originally Posted by black02xtr
also another question would an exhaust leak at the manifold cause any of these symptoms? also could fuel filter be a problem
07-17-2012, 01:35 PM
#7
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Originally Posted by black02xtr
Not hard Start doesn't die or smoke black
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07-17-2012, 02:20 PM
#8
Maybe the malfing coolant temp sensor is putting the truck into " save the engine, limp home condition."