High idle
So I've got a 93 f150 5.0 4wd Auto tranny, I changed the tps and cleaned the throttle body and now it is idling anywhere from 1500-2000. Before I cleaned and changed these things it was idling at 1000. I've also unplugged all sensors connecting to the TB 1 at a time and none of them effected the idle. I've let it idle for probably 10 minutes and it hasn't came down any, also if I put it in gear it drops to a normal idle (1000). Any idea what the cause could be?
A common problem with the Gen8 (87-91) was the idle air control solenoid (IAC) which straddles the throttle butterfly would gunk up. A good all-around spritz of carb cleaner followed by a check of free full-range motion usually cleared things up.
On the other hand, you could have a vacuum leak to chase - normal idle is about 850RPM.
On the other hand, you could have a vacuum leak to chase - normal idle is about 850RPM.
A common problem with the Gen8 (87-91) was the idle air control solenoid (IAC) which straddles the throttle butterfly would gunk up. A good all-around spritz of carb cleaner followed by a check of free full-range motion usually cleared things up.
On the other hand, you could have a vacuum leak to chase - normal idle is about 850RPM.
On the other hand, you could have a vacuum leak to chase - normal idle is about 850RPM.



