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Discussion Starter #1
Some advice please...

1994 MR2 N/A (Japanese made)

During the day my idle is running low at 750rpm. I know this is supposed to be the normal rate but it seems to be quite rough. At night however, the engine idles nice and smooth at about 850-900rpm.

What's the deal?

Any help is greatly appreciated.

L
 

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how's your air filter?
when it increases it at night it's because your lights are probably on ... :)

if it bothers you to be that low in the day, assuming that it's tuned up and everything is fine, you can always opt to turn it up a tad.
 
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diabolical1 said:
how's your air filter?
when it increases it at night it's because your lights are probably on ... :)

if it bothers you to be that low in the day, assuming that it's tuned up and everything is fine, you can always opt to turn it up a tad.


How do I do that with the ECU controlling the idle?

S
 

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i don't have a picture, but somewhere on the AFM, there should be a round thing with a flat top (use your BGB). pop the cover off to expose the idle speed adjustment and turn it until you get to 800 or whatever you feel. just don't try to tun it TOO much.
 

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i'll try to find a picture of it, but i can't promise because if it's not on any of my pics on my hard drive, i can't take new ones because my car is in storage about 200 miles from here :(
 

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You have a were-MR2. It's powerful only under moonlight. :p
 
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Thanks Diabolical,

I look forward to possibly getting your picture.

P.S. Excuse my ignorance but, what are the AFM and BGB?

P.P.S. SW20/20...my car is more of a VAMP MR2.. :evillaugh

S
 

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well, the bad news is that my engine pictures all seem to omit the AFM (air flow meter) so i can't show it to you :(, but if you have a camera, then take a picture of yours and i'd be glad to help.

BGB = Big Green Book otherwise known as the factory workshop manual ...
 
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Discussion Starter #10
The car has no problems with starting up or warming up. RPMs seem to be normal.
The car came with a SuperAFC (APEXi model #S-AFC9808-0395) hooked up. It seems to be an older model whereas the adjuster buttons pop-out and change color as the car goes from one range of RPMs to another. I have it set at 0 and when I adjust it one or the other it either slows down the RPMs or doesn't do anything at all.

As far as finding the AFM goes, I've looked and looked to no avail. As for the BGB, I don't have one, considering the fact that I live in Japan and all manuals are in Japanese.
 

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Lukido said:
The car has no problems with starting up or warming up. RPMs seem to be normal.
The car came with a SuperAFC (APEXi model #S-AFC9808-0395) hooked up. ...
As far as finding the AFM goes, I've looked and looked to no avail. As for the BGB, I don't have one, considering the fact that I live in Japan and all manuals are in Japanese.
oh ... okay. now, i'll admit up front that i'm not familiar with the SuperAFC, so i don't know if it's a device that deletes the AFM (like the HKS VPC did) so i guess there's the chance that you really may not have one any more.

however, i don't think it deletes the AFM, so if i'm right, then just trace your intake from your air filter (left side intake) to the point where you see a funny-looking box with a wiring harness plugged into it. that should be your AFM ... it should be to the left of your turbo.

hope that helps
 

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MAP = manifold absolute pressure

diabolical1 said:
that should be your AFM ... it should be to the left of your turbo.
dude, why didn't you correct me? i forgot that your car in not turbocharged. White85N/A also brought up a good point about your car being J-Spec. it very well may be MAP from the factory - i know the Gen III Turbo models were, but i don't know about the non-turbo. in any case i'm sorry i can't help you. i'm not lucky enough to have a MAP MR2 :( so i have no idea how to adjust that.
 

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Yeah i remember during the day or w/e my 92T's parking lights would add like 100 more RPMs then usual.
 
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Thank you :bow To all of you that offered me advice.

I finally found the part that adjusts the idle of my '94 MR2. It's located next to the throttle body, actually it's part of the throttle assembly. I've been looking for a screw, but it is a nut. I adjusted it and the engine is now running at a smooth 850rpms at both day and night. It does rise to about 900rpms when I turn on my lights, but it is still smooth.

:banana L
 
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