1991 Geo Storm "engine idle" Questions

...idle speeds, for hot ,warm and cold engine. and the PCM (ECU) regulates idle with valve called ISC. bad idle can be 1 of 2 things. ISC sticking. or engine runs so bad the ECU can NOT control idle. ...

...idle. On the highway it will run normal and then all of a sudden the engine light comes on and the car boggs down, then it will suddenly go back to normal and the engine light will go out. This all ...

...idle air control, or IAC valve. Take it off and clean it out with some brake cleaner. Carbon deposits and gunk can build up and prevent the IAC valve from operating properly, by causing it to stick. ...

hoses, and intake. check idle air control valve for proper operation, if you have check engine light run codes by shorting diagnotic terminal and turn ignition to run. Should flash any codes in system

...idle will come down after about 1 minute. Under hood, driver side, upper engine area, rear of valve cover, mounted on rear of throttle valve assembly it is not your throttle sensor, it is called an ...

running on all four cylinders, or is it misfiring? You can check that by having someone keeping the engine idling at the lowest possible steady engine speed while you pull off each plug lead, one at a

engine belt slip,cause no starts, due to huge compression drop, and fails the test fuel tests. SOHC, keyon, 30-46PSI same for both. engines but as all mPI engines it drop running at idle. and rises at

93 Geo Storm. The engine surges while driving, usually between 30-40 MPH. Also has a high idle when warm. Thanks u need a map sensor

...change the back throtel sencer check the idle speed sensor also check the fuel pressure at the ...

...engine, i test cranking presssure, idle, 3000rpm and wot pressures to be sure the PFR is working, not just the pump. the spec at the rail is. Late 1986 to 1993 I-TEC MPFI system (after VIN 0908197) ...