Re: Hanging/Slow dropping RPM FIX inside.
 

does anyone have this on video? some revs with and without?

Re: Hanging/Slow dropping RPM FIX inside.
 

I'll try to make a video this afternoon.

Re: Hanging/Slow dropping RPM FIX inside.
 

Here you go, I am bringing the revs up to around 2k then letting off:


Revs WITHOUT IAC valve restrictor plate:

http://www.youtube.com/watch?v=s-_AL...ature=youtu.be


Revs WITH IAC valve restrictor plate:

http://www.youtube.com/watch?v=PsvLT...ature=youtu.be

Re: Hanging/Slow dropping RPM FIX inside.
 

I'm using the NC plate and still get a hanging idle 50% of the time at around 1400, takes more than a few seconds to drop to normal when it does. Is there a real fix for this? My last Mach got the plate and it just worked great, idle dropped fast & hard. tThis one still seems to float even when it drops.

Thanks.

Re: Hanging/Slow dropping RPM FIX inside.
 

Keep trying a smaller hole would be my advice. You might even have to go to just one hole instead of two like I did.

Re: Hanging/Slow dropping RPM FIX inside.
 

My mach has this same problem. Ill be driving and then Ill come to a stop and the RPMs will be at 1500, almost 2000 in some cases, and then after sitting there for maybe 4-5 seconds it drops down to like 600 and almost wants to die. Will the NC plate help?

Re: Hanging/Slow dropping RPM FIX inside.
 

No.

The restrictor plate is not made to fix idling problems.

It is made to force the rpms to drop faster.

Re: Hanging/Slow dropping RPM FIX inside.
 

Just came back to this thread after several years ...

I used to sell these for $4-5 back in the day ... (2005 and prior)

Re: Hanging/Slow dropping RPM FIX inside.
 

Hello. Would the ristrictor plate have any benifit with my auto transmission or it works only for 5 speed trans that have the rpm problem?

Thanks.......

Re: Hanging/Slow dropping RPM FIX inside.
 

Thank you for the info on the hanging rpm's!I can't wait to get to it.
:hoppy:

Re: Hanging/Slow dropping RPM FIX inside.
 

Thanks so much for this fix! Took literally 45 minutes with this piece of scrap tin i had laying around. Drilled a 7/8 big hole and 5/16 "restricted" hole. Instantly noticed a difference upon test drive. Rpms drop like my last notchback did. Kudos!!

Redoing The Fix?
 

I did the fix for the hanging RPM problem on my '03 and it worked great. Not too long after, I put the Diablosport Predator on it and had no issues. A few months ago, I got some bad gas (we think) and pulled the tune off to help with the detonation. The RPMs hang bad now and it seems a million times worse than when I first got the car. Probably my mind playing tricks since the restrictor plate worked so well. Anyway, how do I fix this? The plate is still on there and the RPMs hang just a tad too much to ignore. I mean, it has completed messed with how I naturally drive the car. I'm assuming there's some flashing of the computer, uninstalling, and reinstalling of the plate in order but I just don't know. Can someone help me out?
Thanks.

Re: Redoing The Fix?
 

see post #252

Ahh gotcha, thanks. I'm assuming the plate stays in? And does it matter if/when I put the Prefator back on? Thanks.


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Re: Hanging/Slow dropping RPM FIX inside.
 

Mine did the same exact thing until I decided to replaced the IAC with a new one from Ford for about $100 or so. I cleaned the original IAC with brake part cleaner, but still didn't work. I guess it was real sticky?

Re: Hanging/Slow dropping RPM FIX inside.
 

Awesome little mod, can't believe I waited so long to do it!

Re: Hanging/Slow dropping RPM FIX inside.
 

Glad i stumbled on this thread. I've had my auto mach about 3 weeks or so, only driven it a few times. Every first startup this thing fires up aggressive and just stays there like 10-15 seconds it seems(prob a little exaggerated,lol), then finally comes down to idle. I'm always like wtf, thats a bit much and annoys the **** outta me,lol. Def. making one of these tomorrow!

Re: Hanging/Slow dropping RPM FIX inside.
 

Liked the way the rpms dropped to idle with the 9/32 hole, just not how it idled with max a/c on. So i opened it up to 11/32, its better with a/c.....but not how i liked it dropping with the 9/32 hole. Amazing how much it changes with a 1/32 of an inch!


*Edit..... after further review, the call on the field has been overturned! 11/32 hole is working great like had hoped.

Re: Hanging/Slow dropping RPM FIX inside.
 

I see this is an ancient thread, but I got mine from SR Customs off ebay, not sure of the hole size (though both holes were the same size). I like it!! It isn't an in your face difference, when I first crank car, rpms drop much quicker, idles steady and smOoth at 800 rpms (notice rpm steady, but shaker is moving more like a cam installed, again subtle). Turned on A/C and headlights, idle dropped to 700 and stayed between 700 and 750 rpms, everything is real smooth and steady. When I bump the throttle to 2-3k and let off, revs drop quicker, but again it isn't massive (reading all the post I think where I got mine the hole size must be conservative), but overall, I like it and for $6.30, a bargain and worth a risk, I brought the original gasket and an 8 mm wrench with me in case I had to swap back, but zero issues, though I only got about 125 miles on 1/2 tank , could be the 4:10 gears and my right foot:rolleyes: , don't really see how this could affect gas mileage (????), but in general pretty easy mod that works as advertised, don't find that very often nowadays. My two cents, have a nice evening everyone!! :3amin:

Re: Hanging/Slow dropping RPM FIX inside.
 

That is basically forcing the idle relearn. I can't imagine it takes hours. I've gotten the idle to relearn with just unplugging the negative cable for 15 minutes. I turn the lights on and hit the brakes, then reconnect the battery.

- Let the car idle and get up to normal operating temp. I wait until my fan comes on in the summer months.

- Then wait at least 1 minute after reaching normal operating temp.

- Turn on the AC to Max and let idle at least another minute.

- The turn off the AC and go for at least a 10 mile drive. I usually cruise around for 10 - 15 miles, then do one or two WOT's. The computer will still continue learning idle, but you should notice a big improvement from when you first started it up.

I do this any time I change my tune, or when the mechanic I go to disconnects the battery for any reason.

Re: Hanging/Slow dropping RPM FIX inside.
 

This is on my to do list now, sorry to bring back this old thread but this is good info for us newbs. :claus:

Re: Hanging/Slow dropping RPM FIX inside.
 

So I did this mod today, didn't use a metal plate but picked up one made out of mr gasket header gasket material, it came with 9/32 and 11/32 holes and immediately when we started the car up I could tell a difference, rpms come down much faster and the car kind of sounds like it has a mile cam now @ idol. Was not able to test drive the car but maybe tomorrow early before the N.Y.E. crazies hit the roads.

Thanks for this awesome info :thumbsup: :horse: