idling problem

spano · Post by **spano** » May 6th, 2005, 2:58 am

when i start my car, it usually idles at around 2000 rpms until i start driving it, and then once i get to a stop if i stop completely, it'll idle back and forth from 1000 to 1500 rpms and just keep going up and down. I'm thinking it's because my throttle is loose or maybe there's a problem with my throttle wires, but i'm no pro i have no experience with this stuff so i'm hoping anyone can help me out here

jschrauwen · Post by **jschrauwen** » May 6th, 2005, 9:42 am

Idle issues similar to yours have been addressed in the V6 forum. It may be best to move this post to the 4cyl/6cyl forum.

hoffman_BMX89 · Post by **hoffman_BMX89** » May 6th, 2005, 6:15 pm

hey i have the exact same problem it pisses me off what could it be TPS sensor or IAC????????

jschrauwen · Post by **jschrauwen** » May 6th, 2005, 6:37 pm

Check to make sure that there is absolutely no cracks in the ribbed rubber intake tube between the VAF and the TB. The slightest little crack in the tube could cause this fluctuation. Make sure you have no air pockets in the cooling system. Ensure there are no leaks in any of the vaccum lines.

freyguy_412 · Post by **freyguy_412** » May 6th, 2005, 10:35 pm

Woah.. IDLE at 2000 rpm? This is normal if you have just started the car on a cold morning, but at normal operating temperature your car should idle at 750.

spano · Post by **spano** » May 6th, 2005, 11:38 pm

freyguy_412 wrote:Woah.. IDLE at 2000 rpm? This is normal if you have just started the car on a cold morning, but at normal operating temperature your car should idle at 750.

No i'm talking about everyday, hot or cold it'll start up at 2000 rpm

hoffman_BMX89 · Post by **hoffman_BMX89** » May 7th, 2005, 1:06 pm

yup same my idle just always goes 1000-2000rpm and it bothers me so much i am gonna chack my intake to see if there are any leaks i am pretty sure there isint any i cant wait to do my swap this way i wont have to worry about this stupid problem it would be nice to have it fixed for the time being though

freyguy_412 · Post by **freyguy_412** » May 7th, 2005, 5:22 pm

Does your idle go down after you drive the car for a while? It should be up high for a little bit when you first start the car: your idle control valve is kicking up your rpms a little bit, just like a choke on an old carburated vehicle. When the engine gets warm, and can run well without help, your idle control valve should let the idle drop back to about 750-800 or so. Check your idle control valve before you do anything.

hoffman_BMX89 · Post by **hoffman_BMX89** » May 7th, 2005, 6:27 pm

no the thing is it always stays like that its not the cold start my idle just goes stupid it always is at 1000-1500 rpm and at the odd time it will go as high as 2000rpm

freyguy_412 · Post by **freyguy_412** » May 7th, 2005, 7:28 pm

Definatly check the idle control valve... maybe play with the idle set screw right on top of your tb...

BarrieMX3 · Post by **BarrieMX3** » May 15th, 2005, 11:59 am

My 4 cyl does the same thing, from around 1500 and drops to almost a stall. But it's not consistant. Some days are better than others.

Tunes67 · Post by **Tunes67** » May 15th, 2005, 6:10 pm

All of these problem descriptions are consistant with Throttle Body issues. You can take the easy way out and just replace it. Or, you can clean it completely (Take it off the engine and take it apart) You will need 1 gasket and 1 seal from your mazda dealer. The online shop manual has information on how to adjust your TPS. I will be posting a FAQ on how to do this in a few days (need to check some information with my mazda mechanic).

Tunes67

MX-3.com

idling problem

idling problem

Idle control