Please help pulled codes and dont know what they mean!!!

[Orie]

Hey everyone. my truck has been doing some weird stuff. it seems like it has no power until i hit about 2k rpm the nose dives at 4k rpm. when its cold it bucks really bad. i just replaced everything that has to do with spark except the tfi recently and it was doing this subtly before then, also replaced the pcv valve and fuel filter.

here is what I have and ill give you the code after the truck info.

1991 Ford Ranger xlt super cab

3.0 liter v6 fuel injected

5speed manual trans.

2 wheel drive

A/C

around 185k miles

ok the codes i have are as follows:

KOEO:

14 Eratic PIP
66 MAF/VAF SIGN LOW
95 FUEL PUMP CKT OPEN- ECA TO GND

KOER:

66 MAF/VAF SIGN LOW
98 DTC PRESENT (FMEM) EPC CKT FAULT

any help you guys can offer would be great, i want my power back, and better gas mileage, im at about 10 mpg right now and it seems to be decreasing

 

[davecarr414]

fords are knows for there mass air flow sensors going bad, happend to me. and it looks like you have a code for one. i would give that a try

 

[wahl_7s]

sounds like the MAF is bad or dirty try to clean first save a few bucks if it's dirty a little squirt of brake clean will do it, but don't touch it