Eratic Rpm At Cold Start

[Tom Neri]

My idle goes up and down almost to the point of stalling when I first start the car and have the air conditioner on. The car only has 5600 miles on it. Would appreciate any help with this matter.

 

[jarredsoon]

check for vacuum leaks or a rubber tube fallen off. Be sure that all sensors are plugged in with the harness tight. check bat cabes are tight and ground to cylinder head is tight.

 

[Tom Neri]

Thanks for the reply I will check the ground Connections in the battery cables and the sensor connections again I've checked all the vacuum lines and I will let you know what I find

 

[8289ta]

Also may want to check your TPS and idle settings.

 

[Tom Neri]

Ok, thank you

 

[Guss23]

Hello, I had the exact same issue. It seemed to be running rich as well. Turns out, it was the fuel pressure regulator. The diaphragm was ruptured and, as it’s attached to the vacuum system it was sucking gas. Run it for 5 min and the turn it off and disconnect the vacuum line on the fpr and see if gas comes out of the vacuum port. If so, bad fpr. Easy fix