I went 2 get the imrc disconneted and then remapped.When i got there the mechanic wasnt sure that u can just disconnet it and remap it.He said the car wouldnt run right is this ture? As i didnt get it done till i find out some more information on it.If it can be disconneted why did ford put it on?

 

Give up on the idea of the disconnect. Spend some time researching how manifold works and you will soon see there's no logic in a disconnect. If someone really insisted on removing it then it would seem more logical to use a 2.0 Zetec manifold but my mind boggles why anyone would consider it. It's like someone trying to say remove the turbo off a focus st and just drive it.

 

I have heard that the flaps inside always brake and its a common problem.If its disconnected and then remapped would that not sort out having it disconnected?

 

The flaps don't break. The 2 areas that fail are either the imrc itself or the plastic dsi clip that moves the cable. Both control the flaps and they fail in either the closed or open state. You can DIY repair the imrc, there's a YouTube clip that runs through it, the copper brushes need cleaning up etc.. The dsi clip can be replaced with a billet alloy job from a couple of suppliers.

 

If its that easy 2 fix then y do u c so much threads on here saying that disconnecting it is the best thing 2 do and cheapest meaning it wont go wrong once its mapped

 

iv read of one person only saying this and its not been backed up with any proof of the benefits or a logical explanation for the benefits. post links to the other threads iv missed.

 

Same here, first I've heard of it is in the last few weeks. I've had one for over 7 years and I'm on various forums. It's the first I've heard of removal.

It's not the first car fitted with it after all, st24s had it too and the imrc overheated and failed.

 

Well went 2 get it remapped and sorted at another garage.He now says there is nothing wrong with the imrc box its got some thing 2 do with the fuel rail pressure sensor with i replaced the whole fuel rail and the 2 lamba sensors so y would they b showing up again.The codes where cleared when they where fixed bout 1 month ago.Has any 1 else had problems like this?O and apparently i have an ecu tbat can not b remapped its a 2003 st170 has any 1 heard this b4?Its starting 2 do my head in.

 

What's the fault code it brings up?

First I've heard of not being able to remap them considering you can buy a bluefin or dreamscience and do it yourself. Afaik there were no changes to the ecu over the production of them.

Where exactly are you taking it? I'd suggest finding a good tuning/performance ford specialist to deal with it, doesn't sound like you're using someone that understands them very well.

We used a Ford satellite dealer to service ours when we first got it, even they didn't have a clue what to do about the fault codes when the eml came on repeatedly.

 

It brougjt up p1538 thats the imrc stuck open then it went by itself then it brought up the lambo sensors even though they where new bout 1month ago.Now its saying bout the fuel rail pressure sensor but again it was change at the same time cause it was bad.I took it 2 a guy who was a friend had got his bmw done and he had no prob thats y i went.He said that each year ford put out a tender each year 2 make parts some of with endind in the ecu he ssid its the prosser in it he said ford are not the only motor company that do this and said i should get on ecu of a different year and he can remap it and put it in my car.He said that he would need the car for a day to investegste and fix what i thought was the imrc box but hes the mechanic.Im from Northern Ireland and we dont have good performance fitting places here its more word of mouth and im new 2 cars and dont much bout them and rely on advice hench y i joined this site.Cannt even find a haynes manual bout them.

 

Thats exactly the issue I had, they changed the lambda sensor twice before I gave up going back to them.

First I've ever heard of the ecu not being able to be mapped. I don't doubt his story but find it hard to comprehend when the big players in obd tuning do kit for them. Have you tried calling a tuner over here, maybe Motorsports developments, they could have a franchise over there.

 

Thanks ill look them up and give them a ring and have a chat and see what advice they can give me.It really starts 2 piss u of with of the problems they seem 2 get.

 

The ST170 Black Oak ecu can only be altered using very selected tuning tools, most of the main players tools don't support the ST170 for this reason.

Its not that it cant be mapped, they just don't have the right tools for it.

 

Could u tell me a few of the suppliers i think i will go the way of keeping the imrc in the car so just clean it and do the clip.

 

I don't know which tuning companies have the correct tools for the ST170, youd need to enquire with them yourself.

You need a company that has access to SCT

 

Hi this is going 2 sound daft but what do u mean by SCT?

 

go speak to dreamscience hydro. is sct the handset thats used in america? its a similar thing to the dreamscience handset.

 

I phoned motorsports developments 2 day.I gave them the make,reg and year of the car and the man i was talking 2 said that on his computer there is a thing saying that there is some ecus of that year that cannot b remapped and that changing the ecu i would have 2 change the wireing lome and imobaliser he said it was a big job 2 do 4 not much benifit and thst i was stuck with a car that nothing can be done 2 without putting on suppercharger lol

 

youd barely notice it had a remap anyway so dont bother wasting your money.

 

If you fitted ITB's then surely you can remove it ?

 

What are ITB's?

 

Inlet throttle bodies.

 

If i removed what? I dont understand whst u mean.

 

If you fitted throttle bodies you would need to remove the imrc.

 

Seen a nice supercharger kit which would be good on these

 

If u can fit them and remove the imrc then y r other people on here saying that u cannt remove it?Seem 2 b getting alot of people on here with ideas of what u can do but no 1 seems 2 have proof of what u can do.

 

Where did u c that?Can u put up a link?How much was it?

 

No they completely replace your inlet system

 

http://www.tts-performance.co.uk/#!f...-diy-kit/c1psb

Been in a kitcar with the better kit fitted

 

Theres no saying you cant disconnect your imrc. you can! but the car will be gutless. ford put it on the car to give a good balance of torque at low revs and higher bhp at high revs.

plenty of people have removed the inlet manifold and gone to individual throttle bodies but your looking at a cost of around £3000 .

you cant just disconnect something and expect everything to work fine. something has to be done in its place.

I dont mean to sound patronising but it seems like your knowledge is not extensive so your at the mercy of internet forum users which can prove very dangerous and expensive.

 

I suspect you could make it work via a manual switch or lever ? although I wouldn't know if it would add any benefits.

My imrc has thrown up the eml since day one, I work at a Ford dealership and have taken the unit apart 3 times now, each time I can find nothing wrong with it and each time I check the actually intake system, all is working really well.

So I've come to the decision that I will just put up with the light being on.

 

I am new 2 cars and modifing them.What i was told at the start was that u can disconnet the imrc bix and then remap the ecu 2 let it no and adjust the ecu 2 have the lower torque.Its hard 2 get the information bout the car as i cannt get a book like the haynes books as they dont do them 4 the st170 i have even tryed over in america cause i hear they call it a svt.

 

il try to explain what the manifold does to help you understand.

on most cars they would have a set type of inlet manifold that from the butterfly to the engine is a preset length.. the distance the air has to travel to get to the engine(for reasons i dont understand) has an effect on how it makes power.

id assume ford for instance on say a 2.0 zetec engine designed the inlet to have a good balance of torque and bhp so stuck with a preset length. so that manifold has one path only to the engine. this will not optimise the engines potential for torque or bhp but will be the best of both worlds.

with a st170 the inlet is a 2 stage manifold that allows ford to give the best of both worlds. the manifold is switchable to a long length runner and a short. the imrc is the control unit that switches from short to long and back and forth as the engine requires.

if you disconnect it the default position is the short runner so you will be left with a loss of low torque until around 5-6k revs.

set it on the long runner and it will feel fine upto 5-6k but then lose the top end bhp.

there is no in between best of both world setting to it. i dont believe a remap can bring back the lost torque. ford could have saved them selves millions surely by chucking the imrc in the bin themselves and had the car mapped differently.

im not the best at explaining so it may help you or it may not

 

Yes mate that helped i c ur point on y ford would not have put itbin unless needed.Thanks chum.Do u no where i can get a book like the haynes book so i can learn more bout the engine.I like the cars and want 2 b able 2 do things myself plus have the book as a guide.