got an odd problem with my car. car starts ok, runs well
but when it gets warm these strange issues pops up.
1... stepping on the brake the idle rises to 2500-3000 rpm.
let up on brake idle drops to normal.
2....turn headlights on idle rises.. shut lights off...normal
3....turn heater fan on idle rises.. shut fan off...normal
this is a total mystery to me for a mechanical fuel injection system.
motor is a DPI with cam and headers....no turbo....5 yrs ago.
replaced plugs, wires, cap and rotor...
replaced throttle cable...had slight burr on it...
adjusted valve lash...
serial #2691, stick shift. 160,000 miles
it all relates to a warmed up engine, acts up after 20/30 minutes of driving..
any ideas?.....