1992 with hesitation
8/27/07, 06:34 PM
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1992 with hesitation
i have a 92 5 speed 5 liter with a hesitation under steady cruise rpm....its noticable under 2500 the most....tonight when i checked the codes everything is normal with the engine off but with it running i get left oxygen sensor rich and cylinder test i get the 7 cylinder weak.....would the o2 weak cause this?????as for testing...i put a new fuel filter and checker pressure and cleaned the injectors and checked for vacuum leaks....on the ignition side i have new cap and rotor and wires and plugs all from ford....i replaced the tps to test and see and it seems to calm down a bit...i also took the cold air intake off and that seemed to help but its still there....so again...should i go to the o2 first and then retry ???
8/27/07, 09:10 PM
#2
Bad injector.....No. 7 If the car has over 100,000 miles you should just replace them all and see what a world of differnce that makes!!!! Cleaning only helps a little and you cannot be sure that the flow is good enough for cooling the cylinder and smooth running.
8/27/07, 09:15 PM
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the car has 108000kms on it.....i am gona try to unplug the o2 sensors and see if it runs better...if not then im gona get some new injectors and put those in then....i want to see if a bad o2 could screw all this up and make it run this way....what do u think???
8/27/07, 11:06 PM
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unplugged the o2 sensors tonight....check engine is on and it seems to have cleaned up somewhat...it did a small stumble once or twice when i was really lugging the motor....it seems better...but also its late and im tired...so by me unpluging the o2 sensors does it make sense it could run better????
8/28/07, 01:27 AM
#5
Jules, not sure if that would make it run better, if its not plugged in then it won't send any info to the CPU to adjust the mix. I had the same thing go wrong with my 87 GT and played with all kinds of stuff, ..plugs wires maf tps and finally just changed out the injectors and woolah runs like brand new. The stumble I had got worse and worse then it would run better for a couple of days and then backfire a couple times. They just wear out inside after time...
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