A/C FORD Festive

Hello friends I have a Full Injection Automatic Festive Festive, I am from Venezuela and presents the following problem when I turn on the A/C it is low the rpm and when some speed is put more down the rpm and the car trembles in low, high works well.

Car without the A/C on 1250 rpm
car with A/C ignition without speed 700 rpm
car with a/c On and with speed 300 rpm

I wait for your help ..

Good afternoon, measure the pressure of the high A/C, should not exceed 250LB. Or maybe it has the semi -covered circuit (A/C filter) and the co -pressor loads the engine for others. This fault is noticeable in low revolutions and but seek to scare the injection system.

Ok looks first clean the acceleration body and then check the spark plugs if with this does not improve themes that review the relex that are located under the battery that are three check it are not sulfatados or bad I am from Maracay and I had a car to this car just as the turpial is the same thing but the turpital brings the fuse is under the steering wheel are two of the electro and another of the compressor Relex that I told you

WHAT WANT THINGS WE ARE A ORDER FOR MARACAY OR ANY OTHER SEGENCE

Friend one question The car has several reflex under the battery as I do to check if the Relex work perfectly .. In a certain case I disconnect them with the ignition car would have to affect in some way how to turn off the compressor?