I have a 1998 ford ranger 2.5 liter it sat up for about three yeaars before my grand dad decided he would give it to me i got it home drained the gas changed plugs and wires and one of the coil packs and it started right up ran flawlessly for about four days then it was like some body flip a switch it will NOT idle so i went to changeing things o2 sensor coil packs injectors fuel filter cadilytic converter pcv valve and still will not it fouls the plugs out almost immeditly im already on my third set and when i change the plugs it runs great for 20 min then back to the same stuff if anyone has any ideas please help im out of ideas and cant figure it out

 

MODS: Can this be placed in the 2.3/2.5 section?

When you say it will not idle does it stall out? Does it hunt (constantly change rpm up and down)? Can you tell what the injectors are fouled with? Are they black? Grey? Oily? have you tried to pull codes?

 

Did you change the oil?

 

Done. Have codes read and oil changed.

 

i did change the oil twice cause it was so bad and the injectors i pulled out were a little oily so i changed them i pulled the fuel rail off and to me plenty of gas came out of them i did pull codes and o2 sensor bank 1 sensor 1 i changed it and erased the code it has not came up again
It does stall out will run maybe 5 seconds the rpms run up to about 1500 rpm and then starts declining immeditly to zero every now and then it will get to 500 rpm and try to go back up but doesnt just stalls out
I did change the IAC yesterday nothing changed