have a galant 02 but everytime i start it after it sits for a while it runs great for the first 1min or so then it stumbles and seems like its missing then it idle up for 10 sec

5

Asked by Jan 04, 2015 at 12:22 AM about the 2002 Mitsubishi Galant ES

Question type: Maintenance & Repair

I have change plugs and wires twice even the ignition coils  change coolant temp sensor  
clean throttle body  and mass air flow  but the car only stumble after it sits up for a couple
of mins seem like it have to get warm before i can take off if not it wont take the gas i
would have to pull over then after 3 mins it will be ok to drive i dont no whats going on with
it no codes on it plus it dont cut off when its running bad

4 Answers

14,030

Have the throttle position sensor tested.

1 people found this helpful.
123,885

Possibly dirty/faulty idle air control valve or dirty throttle plate. Might also be egr valve sticking open.

1 people found this helpful.
5

Hy Mike I test the tps it showed that it was good and I clean the throttle plate but is there a way to check the Idle air calve or egr valve i believe you could do the egr with a vacuum pump rite

14,030

if you want to try it yourself go to easautodiagnostics.com dandyoun is right though, they can be cleaned. there are youtube vids on the subject. check them out

1 people found this helpful.

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