problem with 92 ford sho

[danieln92]

Ok I was wondering if any one could help me out I was driving the car the other and when I hit the gas it started sputtering so I let off the gas the idle went down and now is very rough and I hit the gas it the rpms go's up to 1800 the car then starts sputtering and stays there let off the gas and put you foot on it slow it got a up fine and back to punching the gas when you do so between 1800 and 3000 rpms sputters but when you get to 3000 rpms it's fine rpms go up just fine so when I get it home I popped the hood and the batty was leaking out the top so a pulled the alternator off took it up and got it tested and it went bad was giving to much power put a new one on and still the same I took the car to ford and they said it had low voltage to the sensors like 2 amps and said it should be about 5 iv pulled all the grounds off and cleaned them and still the same and help what get grate full thanks for taking the time to read all this

[shorod]

I assume what the dealer told you is that the voltage to the sensors was 2 volts, not 2 amps, and that they should have a 5 volt reference.

If the alternator was putting out too high of a voltage it could have damaged the PCM, but before spending a lot of time and money on the PCM, I'd suggest you check some of the more basic things that could cause your symptoms such as a bad or dirty MAF sensor or, more likely, a bad spark plug wire or one that is saturated with oil due to a leaking spark plug well seal.

On the 3.0L SHO V6 it was pretty common for the seals in the valve covers to leak and allow oil to pool up in the spark plug wells. Over time, this will cause a misfire which results in symptoms just like what you describe.

Checking the front 3 spark plugs and plug wells is pretty easy and straight forward, but the rear three are a bit more difficult. It's been awhile since I did this so I don't recall the specifics, but it seems like there was some plastic cover that needed to be removed and maybe even the IAC solenoid had to be removed to get to the rear wires and plugs.

-Rod