Adjusting Idle resets after turning the car off
#1
Adjusting Idle resets after turning the car off
I know I'm a new user, but I have tried searching for my specific problem and can't find it. I am trying to adjust my idle, as it is too low and droops sometimes.
I jumped the Ground and Ten connectors in the Diagnostic Connector.
Then I adjusted the idle adjustment screw until I got to the correct RPM (I'm doing about 950-1000RPM to compensate for the droop, which if it does droop will then go to 850RPM)
Then I shut the car off and removed my jumper wire.
Now when I go to turn the car back on it goes back to where it was before, at about 800 and then will sometimes hit about 700 or slightly under. What step am I missing?
I've also tried adjusting the idle without the jumper, but obviously that doesn't really work either. It adjusts, but then resets when I turn the car back on. I have also tested the TPS with an Ohms meter and the TPS is working correctly at Idle and WOT (IDL pin at ~.4 ohms until the throttle is pulled slightly and the POW at 0 ohms until WOT). I'm absolutely lost because I have followed the directions by several people, all which seem to be exactly the same.
More specifically, I have done it this way (except using an external tach, I just use the one in the car): https://www.miata.net/garage/ignition.html#idle
How do I get it so my RPMs don't reset once I turn the car back on?
I jumped the Ground and Ten connectors in the Diagnostic Connector.
Then I adjusted the idle adjustment screw until I got to the correct RPM (I'm doing about 950-1000RPM to compensate for the droop, which if it does droop will then go to 850RPM)
Then I shut the car off and removed my jumper wire.
Now when I go to turn the car back on it goes back to where it was before, at about 800 and then will sometimes hit about 700 or slightly under. What step am I missing?
I've also tried adjusting the idle without the jumper, but obviously that doesn't really work either. It adjusts, but then resets when I turn the car back on. I have also tested the TPS with an Ohms meter and the TPS is working correctly at Idle and WOT (IDL pin at ~.4 ohms until the throttle is pulled slightly and the POW at 0 ohms until WOT). I'm absolutely lost because I have followed the directions by several people, all which seem to be exactly the same.
More specifically, I have done it this way (except using an external tach, I just use the one in the car): https://www.miata.net/garage/ignition.html#idle
How do I get it so my RPMs don't reset once I turn the car back on?
#5
It gets shaky when it hits the 700 which I do not like, and it seems to compensate for that by jumping up the RPM for a quick second. It's almost like it does not want to run that low. With my exhaust and everything too, it truthfully sounds a lot better at 900-1000. Truthfully my exhaust sounds like a truck with FlowMasters when it's idling or at low RPM's which I love haha
#7
When I say low RPMs I am talking about low in the powerband but still on the gas. When I am in the RPM range of 800-2000 it sounds just like a truck with flowmasters. It still does not like to be at 700 RPM just idling, it gets shaky and doesn't act like it does when it's idling around 900-1000.
Whether or not you enjoy the RPM range that I chose, my basic question remains the same. Is there something I missing in order for the idle adjustment to not reset when I restart the car?
Whether or not you enjoy the RPM range that I chose, my basic question remains the same. Is there something I missing in order for the idle adjustment to not reset when I restart the car?
#9
Yeah I have adjusted it both with the jump wire in the Diag Connector as well as without it in, and whenever I restart the car it goes back to where it was for whatever reason. Perhaps I try it again tomorrow without the jumper wire and see what my results are. I figured I was doing everything right, it was just not working it seemed. I wasn't sure if the ECU would kinda reset what I was doing (even though I'm adjusting a screw, not like the ECU moves the screw lol)
#10
mkturbo.com
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Why are you jumping ground + ten when setting the idle? All that does is put the timing at a static 10 degrees until you pull the jumper. You should also be setting idle without touching spark settings.
#11
Boost Czar
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or vice versa maybe...
when setting timing:
when setting just idle speed:
if your timing is actually like 16-18° at idle when you're setting the speed, it'll be much lower whenever it's running at 10°.
#12
mkturbo.com
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actually, you're supposed to do that when setting the idle speed. You want the timing locked as you set the idle speed.
or vice versa maybe...
when setting timing:
when setting just idle speed:
if your timing is actually like 16-18° at idle when you're setting the speed, it'll be much lower whenever it's running at 10°.
or vice versa maybe...
when setting timing:
when setting just idle speed:
if your timing is actually like 16-18° at idle when you're setting the speed, it'll be much lower whenever it's running at 10°.