Uneven idle?
#1
Uneven idle?
Hi, could anybody possibly tell me any reasons why a 91 f150 with the 5.8, 351 would idle very unevenly? If it's in park on a flat surface it will idle around 1500 RPM's and jump up and down. But as soon as I put it in gear it drops back to a normal idle speed around 800 or 900 RPM's. I can't seem to think of any reason why the motor would do this so any help would be much appreciated! Thanks in advance!