Re: Hanging/Slow dropping RPM FIX inside.
 

So I bought one of the plates off ebay and put it on. I now have all the symptoms it is supposed to fix. I have less decel popping, my revs go up when I clutch in sometimes, I stalled twice at red lights, and when I stop the revs will hang around 1500 then there will be a pop and it drops down to ~400, almost stalls, then normalizes around 700. Haven't tried resetting the ECU, that might be my issue.

Re: Hanging/Slow dropping RPM FIX inside.
 

So what is the verdict on these plates? Do they work on some Machs and not on others? Does the hole size depend on mods? Does the ECU definitely have to be reset? What size hole do I need w/ CAI, O/R X pipe, and tune... 9/32,5/16, or 11/32?? Would really like to install one but dont want it to cause problems like some I have heard! :anger: Thanks guys!!! :worship:

Re: Hanging/Slow dropping RPM FIX inside.
 

Im having the same problem. Bought a plate from '34Ford' on Ebay with a 5/16" hole to block the one port. Maybe the hole is a little too big, if someone can tell me that or know for sure that its the problem that would be great.

TR, ive tried every possible fix with it and nothing has helped. Ive disconnected the battery to reset the ECU, ive disconnected the battery and pumped the brakes to get all of the electricity out of the car to reset all of the motor sensors, and ive disconnected the IAC while running and pumped the brakes with the battery disconnected and still have got nothing in hopes of resolving this...

Re: Hanging/Slow dropping RPM FIX inside.
 

I don't remember what size hole I started with but it was small. I increased the size until the stalling went away and then let the ecu take some time to settle down and all was well. ----------------- Until I installed an accufab TB, then I needed a bigger hole. :smack:

In the IAC plate!!!!

I use a gasket on both sides of the plate but most work with only one gasket. Make sure you don't have any air leaks and the IAC is clean and it should be fine. Go slow increasing the size in the plate if that's required; you can't undrill a hole. :wow:

Re: Hanging/Slow dropping RPM FIX inside.
 

Well thats what im wondering, if the size of the restricted hole is too small. Cause if i start slowly making the restricted hole bigger and by some chance i go to big, im back to square one with no plate. But at least i know thats the problem. I do wanna wait til i get my Predator though to see if it cleans it up the problem as ive heard it can do that in some cases. As a back up plan, id see if i can get an idle algorithm to flash into the ECU that will replace the factory IAC values with the restricted IAC values. Worst case is id look for another plate cause i like the quality in which it was made. Thanks for the input G...

Re: Hanging/Slow dropping RPM FIX inside.
 

I had to enlarge the smaller hole on mine to 11/32" before the idle dropped like I wanted. I've been using it ever since (4-5 years) with no problems.

Re: Hanging/Slow dropping RPM FIX inside.
 

Awesome, thanks. Im gonna give this a shot if i cant fix it through the Predator...

Re: Hanging/Slow dropping RPM FIX inside.
 

Not sure if this has been posted or not here, but:

get an XCal and load Live Link on your laptop, log ISC Integrator, then send that info to your tuner, he will correct for it. Now throw your restrictor away.

Re: Hanging/Slow dropping RPM FIX inside.
 

And that all cost how much?

Re: Hanging/Slow dropping RPM FIX inside.
 

Well if you already have bolt-ons you should already have a Xcal and tune. So about $50.

If your stock you can borrow a xcal, to log, and if a tuner suggests you change it then it would be 400 for a xcal and then + what the tuner charges.

NOT the economical way, but if you're modded you should only be footing the tune change.

Re: Hanging/Slow dropping RPM FIX inside.
 

Offering a suggestion is one thing...even if it's a more expensive one.....but to tell everyone to throw them away? That's jsut wrong man. THe restrictor plate is quick, easy, low $$ and my 10 yr old can do it in 10 minutes or less. It's worked for years.

And, some people don't want to mess with the tuning yet. Either, waiting, already tuned, or maybe they just want an excuse to pop the hood and do something with their car.

Re: Hanging/Slow dropping RPM FIX inside.
 

I was telling them that after they get fixed they can toss the restrictor. I ran one for 4 months till i got my IAC fixed.

Re: Hanging/Slow dropping RPM FIX inside.
 

OK guys. I've searched until I'm blue in the face and found similar issues to mine with the IAC plate, and am stumped. Here's the one I bought: http://cgi.ebay.com/ebaymotors/ws/eB...SA:MOTORS:1123

It has a 5/16 small hole which I installed to the passenger side as described. Gasket stayed perfectly in place on the intake, so it was never removed. I left the battery unhooked for 30 minutes to reset the computer. Car idles 1500 warmed up, and 1300 with the AC on. Can't make the hole any smaller, so any thoughts?

Only mods to my car are the weld-in flows, off road H (brand unknown) and a JLT true CAI with the MAF screen removed as told in it's instructions.

I would really appreciate any help you guys can offer!

EDIT: I just ordered a second gasket to go between the plate and the IAC itself so I will have "IAC, gasket, plate, gasket, intake." Think that will help?

Re: Hanging/Slow dropping RPM FIX inside.
 

No one?

Re: Hanging/Slow dropping RPM FIX inside.
 

So you saying this plate makes your idle higher?

These plates will not bring down a high idle.


For some [censored/] reason Im not getting a email to my PM's:mad:

Re: Hanging/Slow dropping RPM FIX inside.
 

Yes, it is causing me to have a fast idle. Idle is fine without the plate in. I tried a second gasket last night, and it does the same thing with gaskets on both sides of the plate. I'm not trying to bring down the idle with the plate, only to bring the rpm's down faster between gears.

Re: Hanging/Slow dropping RPM FIX inside.
 

Smaller?

How do you make it smaller? If anything you want to go larger.

Re: Hanging/Slow dropping RPM FIX inside.
 

Not trying to make it smaller. My point was simply that the hole is what it is. What benefit would making the hole larger have? The car is not stalling out which if I understand correctly, would be cured by increasing the hole size. My problem is a fast idle caused after putting the plate in.

Re: Hanging/Slow dropping RPM FIX inside.
 

Everyone will see a increase in idle rpms untill the motor reaches temp.
You may want to look more into removing the maf screen cause I have read here that not only removing it but just turning it can cause some problems.

If you feel the plate is not going to work, I will not hesitate
to send you a refund.

Thanks

Re: Hanging/Slow dropping RPM FIX inside.
 

Thanks for offering a refund, but I would never ask for, or expect one. Your plate is perfect. The problem is somewhere in my car I'm sure. In a nutshell, something goofy in the car does not play nicely with the plate. You could be right about the maf screen, I don't know. Unfortunately the JLT CAI kit puts the **** thing under the inner fender and it is a ***** to get to. I will most likely put the plate in a drawer and forget trying to figure this thing out. I'm not sure that it's worth all the headache that I am putting myself (and you) through. Thanks very much for trying to help me figure this thing out.

Re: Hanging/Slow dropping RPM FIX inside.
 

to the above poster and anyone this may help. I bought the plate off ebay and installed it. ( great quality part and quick delivery I may add ). Well, at startup it dropped earlier to a normal idle than before and after taking it for a spin it drops between gears jsut fine now. Well, after the care was fully warm, coming to a stop or pushing in the clutch made the rpms drop to 1600 and stay there for about 10 sec, then abruptly drop to about 500 and climb and stop at 750. I tried all the tricks like resetting the battery/computer and buying a second gasket for between the plate and IAC which did nothing but aggravate me with the return of the problem.

What worked for me was to remove the plate and open up the hole with a round file slighty ( I didnt measure it so dont know the before and after but it was a slight amount ). cleaned it up, reinstalled it and BAM, no issues, part works great, no rpm or idle issues whatsoever.

My assumption is each car reacts different and requires a different size hole ( albeit no that drastic of a diameter difference ) meaning some are fine with the hole provided while others need a slightly larger one.

I hope this helps more people out. good luck all.

Re: Hanging/Slow dropping RPM FIX inside.
 

Hmm 5.0 drag racer, that is the same issue I had with the drop to 500ish (almost stalls) then goes back up. I'll try making the hole larger. Thanks!

Re: Hanging/Slow dropping RPM FIX inside.
 

I bought one off ebay took like 2 mins to install works great!!!
I didnt Unhook my battery or reset my Ecu.

Re: Hanging/Slow dropping RPM FIX inside.
 

Just an update, I used a dremel to grind mine out about an extra 1/32" and it worked a charm. The difference isn't exactly night and day but it certainly returns to idle a lot sooner at red lights.

Re: Hanging/Slow dropping RPM FIX inside.
 

i have had the restictor plate in for 8k miles, was working great until i drove to carlisle (400 miles each way) noticed when i was there the idle was "sticking" @ 1500, then car would stall. when i got home, i did the same as TRmachwon, removed about 1/32" and, just like that, all fixed again....!! go figure.