Everytime i start my car it revs up to 3,000 until i hit the throttle and then it goes down to 2,000. Sometimes i get into my car and it revs and 1,500 and wont go down. Sometimes my car runs perfect at 800-900 rpms. Whats wrong with the car? It would help me a lot.

 

Nothing, the high idle at startup is normal. Don't kick it down. It will drop when it is ready (maybe 20 seconds).

THe bitggest reason I do not kick it is that it may stall - then you may not be able to restart because it is flooded. Let the starting system work as designed.

 

When the car revs to 3,000 RPMS on startup that is the emissions accelerated warmup thing. If u put it in gear the rpms should drop to 1500ish which is were it will idle cold. It should idle at 700-900 when warm. It could also be an array of sensors if u get a warm idle of 1,500.

 

What sensors would affect this? My car has been idling at 1500 since the new motor (now at 400 miles), except when I put it in gear with the clutch it it drops down and hunts between 1000-1300. I've been assuming its due to the large port and stock ecu. I was hoping it would go away when I install and tune the new EMS, but maybe its just a sensor?

 

If you are stating that he should let the car idle at 3k rpm, then that is some of the worst advice I have seen given on this forum. The ONLY reason Mazda set-up the car to idle that high at start-up was for emissions purposes. If you want to allow premature wear of your engine, go for it.

BTW, if your car stalls while idling at 1500 rpm during warm up, there is something wrong with your car. My car has never stalled on warm-up, even when the temp dropped into the mid 30s (it is Cali after all and not Michigan..).

 

Its not just the start up that makes it rev so high its also when i run it. After about an hour of running it in Maimis weather it still revs at 1300. It does go down when it gets warm. I took it to my machanic and he said that the wax pellet went bad. But im not tottaly sure that is the problem.

 

just start the car in gear, it will by-pass the accelerated warm-up......

 

Thank you for your opinion. I don't think I said to let it idle at 3000. What I said was it will kick itself down.

He wanted to know what is wrong with his car. I told him that there was nothing wrong with this function.

My opinion is that the 3000 RPM for a few seconds is not going to kill my car or put excessive wear on the engine. Almost every car I have ever owned idled high at start in the cold.

 

Kaotic Dan search it. But I would assume it would be the streeport and tuning.

3k cold Startups will probably cause unneccesary engine wear.

 

have u checked the throttle cable? somtimes they can be to tight, especially if they pulled the engine out of the car to do the street port. if its to tight the butterflies will be slightly open. other then that and the obvious idle screw....if u have rerouted the coolant away from the throttle body, u may need to make an adjustment, otherwise it stays in the cold position. other then, i doubt the street port in itself would make the idle high

 

Checked the throttle cable. The idle screws (both on top and bottom of the throttle body) are set all the way down. I guess I'll wait to see if we can correct it with the AEM, and if that doesnt fix it, i'll start looking a little harder for whats wrong.