i have a 91 rs with a 3.1 . i had a oil leak and when we changed trannies we found it was a seal on the back side of the cam? thats the olny thing we could think of what it was. never seen a seal back there. but we fix it. now it flooded and foulded every plug, so i put bosch 2 in them. a week latter there all foulded out so i just put shorty plugs in it. when i give some gas it has black smoke coming out, and when it idels. we thought that it wasnt getting enough gas so we hooked it up and its getting 45 psi. i have no idea why it keeps fouling plugs out.

 

ok so i just pull the 2, 4, and 6 plug and the tips are all black. does any one have any idea that might lead me in the right direction. were thinkin it might be a o2 sensor

 

ok i now have all plugs and wires off. And there all have back tips. gonna jack the car up and check out the 02 sensor

 

Black smoke usually means you are running super rich. Any codes?

 

no codes yet

 

ok 02 sensor is out. all the fins are pluged. and we have heard that sometimes you can clean them up and they will work.has any one else heard this

 

ok, so i took the o2 sensor off, cleaned it on a wire wheel and blew it out with low air pressure. cleand up the plugs and checked my wires over. put them all back on. fired it up a little bit of white smoke but it dont smell like its runnin rich. backed it out of the shop and its still running fine.

 

i guess you can clean a o2 sensor. problem fixed, case closed