2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

My car revs high on start up...

Thread Tools
 
Search this Thread
 
Old 10-26-06, 05:28 PM
  #26  
Balance is key..

 
50/50's Avatar
 
Join Date: Sep 2006
Location: USA, New York
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by riverzendz
Yep, you are hearing (seeing) just right. There is nothing wrong with any sensor. Unless disabled, they all do it. Remove the AWS solenoid and cap the vacuum lines, blip the throttle, or start in gear to keep it from happening like everyone has already said.
Oh so theres a sensor that makes the motor rev high without proper lubrication for the first minute or two? That makes sense.. Mazda owns.. Yes I am a newbie in that case.
Old 10-26-06, 05:35 PM
  #27  
Senior Member

iTrader: (1)
 
Bunchies's Avatar
 
Join Date: Mar 2006
Location: CA
Posts: 660
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by rotorymanincraig
I just blip my throttle and it drops down to 1500rpm. Do the turbo models rev that high when cold? That would be bad for a turbo to spin up with cold oil.
The turbo isn't going to spool up without throttle input.
Old 11-15-06, 01:38 PM
  #28  
Banned. I got OWNED!!!
 
SpooledupRacing's Avatar
 
Join Date: Aug 2006
Location: Comstock Park, MI 49321
Posts: 3,717
Likes: 0
Received 0 Likes on 0 Posts
ok I think that mazda engeneers put that system in there for a reason and I dont think it is a bad one I agree it sounds like it would do damage but honestly I doubt it I think it would be perfectly fine to use the aws system when it kicks on.

btw bunchies a turbocharges is spinning when the car is iding without the throttle being depressed, how ever u dont build boost untill under acceleration and under load. but the turbo wheels are ALWAYS spinning when the engien is running..
Old 11-15-06, 02:05 PM
  #29  
The Extremist

 
mikaz's Avatar
 
Join Date: Jun 2006
Location: Bridgewater, Nova Scotia
Posts: 238
Likes: 0
Received 0 Likes on 0 Posts
You guys thing you are better engineers than mazda? allright..

Anyway, kind of opposite of the topic here, how could I make mine not rev up so much when I start it when it's hot? Only when it is hot do the rpms go to around 3K for a second. It's really annoying!!
Old 11-15-06, 02:09 PM
  #30  
Sharp Claws

iTrader: (30)
 
RotaryEvolution's Avatar
 
Join Date: Oct 2003
Location: Central Florida
Posts: 5,107
Likes: 0
Received 41 Likes on 40 Posts
does anyone read the damn FAQ anymore?
Old 11-15-06, 06:56 PM
  #31  
Junior Member

 
eviljoel's Avatar
 
Join Date: Nov 2006
Location: socal
Posts: 21
Likes: 0
Received 0 Likes on 0 Posts
ok it does this as part of the warm up program. it is supposed to do this to warm up the engine. if it freaks you out so bad right after you start it, bump the gas a lil and itll rev up then go down to operating speed. i dont recommend starting it in gear my friend slipped his foot off the clutch and ran his front end into the garage door destroying the door and his brand new GP1 front end. OUCH
Old 11-15-06, 10:17 PM
  #32  
Strength and Honor

 
stevej88na's Avatar
 
Join Date: Apr 2006
Location: CA bay area
Posts: 391
Likes: 0
Received 0 Likes on 0 Posts
It idles at different RPM depending on cranking temperature too. Below 59F and above 99F, you're only on the fast idle cam. I believe the 3k startup is to get the catalytic converters and O2 sensor up to operating temperature as soon as possible. It doesn't kick in when it's cold, as suggested by HAILERS a while ago, because the oil will be too thick. It doesn't kick in when it's hot because things are probably close enough to operating temperature. Check the first graph out:
http://howto.globalvicinity.com/gv_w...i=60&co=1&vi=1
Old 11-16-06, 06:31 AM
  #33  
Senior Member

 
RX drift's Avatar
 
Join Date: Aug 2005
Location: willis, VA
Posts: 303
Likes: 0
Received 0 Likes on 0 Posts
I hear that one of the primary reasons for the AWS is to help burn of built up carbon upon start up.
Old 11-16-06, 07:57 AM
  #34  
Banned. I got OWNED!!!
 
SpooledupRacing's Avatar
 
Join Date: Aug 2006
Location: Comstock Park, MI 49321
Posts: 3,717
Likes: 0
Received 0 Likes on 0 Posts
IMO I say it wont hurt to leave it and it prolly wont hurt to remove it... I will be removing mine to clean up the engine bay however I still start my car and idle it up to liek 2-2500 for a few seconds to make sure it is warmedd up before I take off... now I know the car is not at operating temps, and I dont have convertors but I still believe the mazda engeneers had it right form the get go and it should do this when nessecary..
I believe a 20 year old system is prolly not working EXACTLY as it should anymore. for instance mine will only sometimes work even when below 30 deg it should anytime cold at that temp but every morning is different sometimes it will sometimes it wont more so now it dont. when I bought the car months back it did it when it sat overnight or for a few hours eveytime like it should but now it is not working properly.. so I do it myself.
Old 11-17-06, 07:03 PM
  #35  
I am the stig.

 
Twofer's Avatar
 
Join Date: Aug 2005
Location: San Diego, CA
Posts: 614
Received 3 Likes on 3 Posts
Pics of the sensor and disconnected plugs. This shot is from the battery side of the car, straight down. It's just a bullet type connector, so it's easy enough to unplug. If it's stuck, use some pliers or vice grips. As I recall, on my Koyo S4 radiator, the sensor itself doesn't touch the coolant, it's just screwed into the end-tank wall, so you could remove it if you wanted to.



And yes, those are Racing Beat oil cooler lines. My old ones were pretty shitty so I replaced them with some nice SS braided lines. I found out later that you can go to a hydraulic shop and have some made for a fraction of the price. Meh.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Kyo
2nd Generation Specific (1986-1992)
6
04-13-19 09:24 AM
immanuel__7
2nd Generation Specific (1986-1992)
89
09-05-15 10:23 AM
zuesskroph
2nd Generation Specific (1986-1992)
0
08-13-15 06:05 PM



Quick Reply: My car revs high on start up...



All times are GMT -5. The time now is 08:28 AM.