jarroyo

First off, I changed the oil and my "uncle buck" smoking problem is almost nill. But I have noticed that every time I start the car the rpm's rocket to 3k for about 30 seconds but after that it idles around 1- 1.2k, if I take it for a drive I find myself feathering the gas while trying to hold the brake just to keep the motor running. Any ideas? Is this a sign of a larger problem or something easily solved? thanks in advance.

QuackDamnYou

The starting up and rocketing to 3k for 30 seconds is part of the accelerated warm up process. That's normal. It should be idling around 800-900 though, not 1200.



Feathering the gas while holding the brake to keep it running...why?



What weight oil are you using?

jarroyo

20w 50, If I don't feather the throttle it stalls every time I come to a stop. Kind of annoying when waiting for the gate to open at my complex. And at stop signs, lights, etc,etc.....

skaterturtle13

does it have auto or manual tranny?

KompressorLOgic

hmm could be a vacume leak

Mason Rx7

As Quack said when you start it and it revs to 3k it is part of the accelerated warm up process. Try starting the car in gear and it shouldn't rev so high. While cold it should idle around ~1,200rpms to warm the engine up. After the engine is warm it should idle around ~750 which is the stock idle.



While the engine is warm and you are sitting still what do the rpm's do when you apply the brake? What about when you turn on the rear defrost or turn on the headlights? It could be a faulty BAC that isn't responding to the new load on the engine from the electrical system.



All of this is IIRC of course.

Baldy

Have you set your TPS yet?

jarroyo

Manual trans

WTF is a BAC?

Haven't touched the TPS, Didn't know there was an issue with it.



Thanks guys for helping.

In2tuners

I have the same problem with mine. I got it 2 weeks ago the guy thought it was the apex but was the Crank angle sensor. And my BAC is new

jarroyo

Ok did a search on BAC and am wondering how do you test it? and what does it look like? Furthermore, if it's bad how do I delete it?