Glenn_

iTrader: (1)

Just after a bit of info or if anyone has come across this.

When im going up the rev range from say 4k upwards the car is holding back and wont rev to the limiter. Ive swapped the coil pack over off the wifes focus and its still the same. Ive also tried plug leads of my mates car.

Also ive used his maf sensor too. Ive had my imcr apart and cleaned the connector inside. Ive got no engine lights on and ive tried my mates fault code reader on the car and there is no faults.

The car had new plugs when my mate had it but i dont know yet if these are at fault.

Im waiting for a fuel filter come to eliminate that.

When the engine is warm should the imcr pull the flap in the manifold open?? Cause mine isnt. I need to try it when the engine is cold. When i turned my ignition on with warm engine om getting a live to both wires to the electric motor in the imcr? Is this correct?

STeve

iTrader: (11)

does sound like the imrc has thrown a wobbler as its not giving you the beans, apart from the intial start up once at running temp keep blipping the throttle around 4.5k and the cable should then pull on the flaps letting the stabled horses out, even if your wiring is good motor or gears can fail as these boxes are a pain in the ass

Glenn_

iTrader: (1)

Thanks for that Steve. I will get my mate to come round so i can borrow his imcr. Then it will eliminate that.

The imcr arnt cheap either. Do you have any Steve.

STeve

iTrader: (11)

as soon as I unbolt one they sell in a heartbeat glenn, brand new Ł270 trade, but I have one with a damaged end that works

Glenn_

iTrader: (1)

What's damaged on it?

I know there a fortune matey. I might just wire a choke cable up then when i get to 4 k revs i would just pull it ha ha ha.

STeve

iTrader: (11)

the little clip part on end of the cable where it attaches to the inlet iirc

Glenn_

iTrader: (1)

Can they not be swapped over. I noticed today on my way home from a course that the car is holding back from 3.5k onwards then the car is jurking and doesnt rev past 5.5k

If i did the clutch the engine will rev round to the limit.

STeve

iTrader: (11)

I would try another imrc as my gut feeling is yours has packed up, all thats up with mine is the cable crimp part that holds the plastic connection on has come off so its got a chock block holding it

RichieST

iTrader: (2)

I reckon it's the fuel pump Glenny, not uncommon on these. Does it rev right round in neutral when stationary?

Glenn_

iTrader: (1)

Yeh im sure it does matey.

Ive noticed a module under the back seat. Im sure this is for the fuel pump.

Glenn_

iTrader: (1)

Yeh im gonna ask my matey to come round and pinch his to try.

RichieST

iTrader: (2)

I'd put money on it being the pump dude.

Glenn_

iTrader: (1)

Ive done a quick google search and it seems to be a common problem.

I will try my mates imcr then go from there. Do the pumps just break down. I wouldnt care i changed a fuel pump/sender on my mam and dads old focus years ago cause the electrical connecter corroded and the pump was ok.

RichieST

iTrader: (2)

Yes they are quite common. They are a variable output pump, there is just a feed line and no return so it isn't a simple permanent supply.

Tank off job to do too which is a bit of a coont!

Glenn_

iTrader: (1)

Yeh i remember doing my mams focus on her drive in the snow. I had to drop the exhaust down to get ar the pump.

Ive seen a video on you tube and the lad cut a hole in the floor under the seats lol

STeve

iTrader: (11)

when I remove pumps thats all I do is cut a hole in the floor, pumps can fail but nowhere near as common as imrc I would still try your mates as at least you can rule it out without the aggro of getting involved in the tank

Glenn_

iTrader: (1)

Im gonna try his first then i know for certain. I dont wanna just spend money for the sake of it.

STeve

iTrader: (11)

exactly and go from there

Glenn_

iTrader: (1)

I will let you know what happens.

RichieST

iTrader: (2)

The imrc pulls open when you start the car, so just watch the end of the cable to see what it does when someone starts it.

Glenn_

iTrader: (1)

Yeh i thought it did this. Should it happen all the time cause when the engine was warm last weekend when i was looking at it this wasnt happening.

STeve

iTrader: (11)

next time it tugs is around 4.5k when it opens the flaps so get someone to rev it around 4-5k not hold it at those revs just rev it and if nothing happens its kaput

Glenn_

iTrader: (1)

Coolio. Like i said i noticed the car holding back at 3.5k yesterday.

RichieST

iTrader: (2)

With the engine off look at the end of the cable on the side of the manifold. It should be fully out. When you start the car it should pull the cable in, then at high revs it will let the cable out again, in the same position that it is when the engine is off.

RichieST

iTrader: (2)

When mine failed it didn't start holding back at all, it just lost that slight change in engine note at high revs.

Glenn_

iTrader: (1)

Thanks for the info. As said should it do this when its warm.

When my mate owned the car i can remember him saying the car had no power. That was cause of the imcr.

So what does the fuel pump module do then Ritchie. Do it regulate the fuel to the engine????

RichieST

iTrader: (2)

It will do it all the time. Just check it pulls on the cable when you start it.


I guess so, the fuel pressure sensor on the rail tells the module to send more fuel, which the pump will then do. It isn't a normal supply and return type system.

Glenn_

iTrader: (1)

When i checked the imcr when the engine was warm and it defo wasnt working when i turned the ignition on.

Its strange having only a feed pipe and no return.

RichieST

iTrader: (2)

Did you start the engine or just turn the ignition on?

Glenn_

iTrader: (1)

I was just turning the ignition on.

RichieST

iTrader: (2)

You need to start it up ya twerp!

Glenn_

iTrader: (1)

Oooppppps lol.

Glenn_

iTrader: (1)

My mate Fiddy came round with his mondeo to try the imcr. Before i took his off i checked mine. Start the engine and the cable/inlet manifold flap moves. Rev the engine to 4.5k and it also move.

Ritchie i think you must be right it might be the fuel pump. Ive got a fuel filter come cause i doubt thats ever been changed then i will go from there. I will get searching for a fuel pump.

Thanks to Fiddy for pestering you.

studabear

Is the cat in one piece internally?

Fiddy

Your not pestering me mate, the amount of things you've done for me over the years, I still owe you about 100 favours. And it's Defo fuel related mate, it's no coincidence that it's fine till around the revs the imrc does its thing, then it starts missing hard, it was a lot worse than I thought it would be. It's not the leads, coil pack or maf, we've tested them, and it's not the imrc, that works, and when it does open, and it's supposed to get more fuel, the issue starts, might have took us a few days of head scratching and swapping parts, but at least now you know what the problem is, you need anything, or just want some company while your doing it, you've got my number

STeve

iTrader: (11)

then like richie says could be pump or injectors or pressure regulator

Glenn_

iTrader: (1)

Or Steve dont give me more things to check ha ha ha.

Fiddy thanks again matey. I told you it was bad ha ha ha.

Do these fuel pump control modules have to be coded in? Im sure ive read somewhere you have to code them in.

Fiddy

It's not bad mate, it's awful, I was just expecting it to miss a bit and be sluggish, by the time we got back to yours, I thought I had whiplash

Glenn_

iTrader: (1)

Ha ha you comic. Its defo not a misfire.

Glenn_

iTrader: (1)

Well i changed the fuel filter today at work. I gave the car a good kicking on the way home and it was reving right round to 7k. I will keep trying it so hopefully ive fixed it.