OK, I have a 91 Civic LX 1.5 Dual Point Injection. Whe the car is warmed up (driven atleast 20 min) and idling at a stop it will idle really low and most likely stall. It runs and drives perfectly fine otherwise. When this idle problem starts, it wont stop, and when I put it in park it will idle high (1500rpm+) which it doesnt do before it starts having problems. I have tried everything and tested everything I can think of, I need some help please... I cant find the EGR Valve on this car, anyone have any idea where it could be and whether this could be the problem?

 

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