Is it possible to tie the secondaries open on the 2.5 v6.as my imrc is not working. tried a few second hand ones and they are all inoperative.
imrc innoperative
- Thread starter capricougar
- Start date
Yeah you can tie them open or remove all together...
A few including myself have removed them
The IMRC is...problematic. There's a reason it and the EGR exist - Cali-forni-aaaa - but if you tie the secondaries open you won't regret it. Just a small loss of torque which is easily managable if you know what your right foot is for.
been down garage looking at linkages....are the secondarys open at 11 o clock or 1 o clock viewing from the inlet side.do I tie the arm forward or rearward?
If you put a bit of garden wire onto the linkage at the front, its a matter off pulling it forward to the front of the vehicle and fastening it to something. That's assuming the various bushes / linkages are in place, or the rears might be unaffected. I tried running like this for a while, but eventually realised my IMRC was actually working. May I ask what it is that makes you think yours are inoperative ?
Trying to rev the engine from under the bonnet will take a whole lot of revs to see anything happen. I think it needs to be under load to work at the stated 3,500 rpm. Mine takes about 5,500 rpm before anything moves. Having said that the IMRC design and placement is atrocious. The transistor is mounted with a nylon bolt to a poor heatsink material, a diecast box. So when it warms up the plastic relaxes its grip and it overheats some more. Plus the limit switch is a bit 'jessie'. Good luck with this anyway, it took me a month or so to get it right...
I no longer have a "kick" when accelerating .its smooth all the way up to 100 ( on private road) .I had also tried the rev over 3500 and saw no movement.maybe I am been too concerned that its jammed and its fine.I have also replaced brake calipers with new, and found a big difference on acceleration.
If you dont have a kick then its not doing anything. That kick is when they open and you suddenly have twice as much air going in.
You mean the brakes were binding ? As the others say, sounds like IMRC is not doing anything, but do you have any diagnostic codes relating to the IMRC ?
Huh. I just went on a journey of Tiger's history and realised how long she and I have been together.
I see where you're going here, but that's definitely an IMRC fault. If you've never driven a V6 Cougar with a working (or deleted) IMRC, it might seem like your expectation of what the car can do is pretty poor.
Imagine getting to 3700 RPM and finding that she doesn't want to accelerate. That would be like driving a 115BHP 1.6, I think?
Huh. I just went on a journey of Tiger's history and realised how long she and I have been together.
Huh. I just went on a journey of Tiger's history and realised how long she and I have been together.
I see where you're going here, but that's definitely an IMRC fault. If you've never driven a V6 Cougar with a working (or deleted) IMRC, it might seem like your expectation of what the car can do is pretty poor.
Imagine getting to 3700 RPM and finding that she doesn't want to accelerate. That would be like driving a 115BHP 1.6, I think?
I was thinking there are several IMRC specific codes available in the diags that could point to something more specific...
IIRC there are only 4 IMRC codes..IMRC stuck open(front), IMRC stuck open(rear) IMRC stuck closed(front) IMRC stuck closed(rear)
Maybe not that exact wording but thats all it will tell you
To my way of thinking that is more specific than 'inoperative', but how on earth would the diags know ? There are no sensors to return information about either butterflies position ? I'm guessing its a legacy thing, some earlier model having extra features. It would be interesting to force them open / closed and see if the diags get it right. I bet they don't...
My are both wired open and I get
Front bank stuck open & Rear bank stuck closed
So yeah your bet is right
My are both wired open and I get
Front bank stuck open & Rear bank stuck closed
So yeah your bet is right
I got that idea from inside an IMRC I was fixing. Here is a pic from the Ford Wiki - IMRC How To Fix
The phosphor bronze spring contact is the only way anything can get any feedback on the butterfly position, by assuming that if the cable has reached the end, and closed the contact with the cam and the linkage is intact - then it must be open. As you can see there is another empty contact position next to the 'real' one. I suspect on another model, the other contact was present and fitted to a corresponding cam that indicated when it was 'not' open at the beginning of travel. Maybe yet another vehicle had two IMRCs or there was a 'double cable' IMRC version - who knows.
