my usual

[garyl]

I drive 91ranger with a 2.3L engine I have been having problems ever since I got it. It tops out at around 55mph which is fine but if it sits idleing a few minutes it's top speed drops to 25mph I was told it may be MAF sensor. In order to test it I was told to unplug it so I did the truck would start but die within seconds. Also as I was driving down the highway I lost speed so I let off the gas Then tried to speed up but my speed kept falling.
ANY IDEAS WILL HELP

 

[97ranger xlt]

there should be a valve on the fuel rail where you can test the fuel pressure (engine off of course!!)

 

[keith0486]

sounds like your loosen fuel pressure to me to