WHY DOES MY ENGINE MISFIRE WHEN I'M CRUISING ON THE HIGHWAY. THIS USUALLY OCCURS WHEN I'M CLIMBING A GRADUAL HILL. IF I GIVE IT GAS THE VEHICLE JUMPS
2000 Chevrolet Silverado • 19,300 miles
I have replaced all censos! Fuel pressure is 50 psi where it is suppose to be lost!
October 5, 2012.
October 5, 2012.
Hi thank you! I replace the fuel pressure sender, map sensor, all four O2 sensors, fuel pressure reading is 50psi, spark plugs changed 3000 miles ago, I put a computer on it and it said my barometric pressure voltage is 4.25 which I think its suppose to be reading.5 volts. So i'm very lost can you help me? Oh yeah it idles with a little miss and when I first get on the fuel slowly it bucks and chokes misses bad. Then when I kick it down to the next gear it runs fine. But when its in overdrive going up a hill it does the same thing until it kicks into the lower gear. Any help would be appreciated.
Can anyone help please only vehicle I have to get to work and pick up the kids from school
When is the baro sensor reading 4.25 volts at idle or with the key on engine off?
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