Hi guys I have an 08 mazda tribute 2.3litre 5 speed. The truck started losing power and bucking really bad about 2 months ago. If I shut the truck off and let it sit for a few minutes, then start it back up, it runs fine for maybe 10 minutes or maybe a week then it eventually starts missing and bucking again. It throws the code p0191 which is the fuel rail pressure sensor. I have replaced the sensor twice and put new plugs, wires, coil packs, fuel filter and ever replaced the pcm. The truck is still doing the same thing and throwing the same code. My Mechanic and myself are stumped. Does anyone have any ideas?

Any help would be really appreciated as I have already sunk more than $1500 into this truck with nothing solved.

 

I also need to know if my SUV has vapor evacuation unit on it.

Can someone please help me.....I'm desperate.