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        General >> Give/Need advice to/from others >> EGR rubber pipes
        
(Message started by: lleewar on Jun 12^th, 2011, 5:54pm)

Title: EGR rubber pipes
Post by lleewar on Jun 12^th, 2011, 5:54pm

Would there be any possible reason for the two pipes just to blow/come off. Pressure being a possibility? Lee

Title: Re: EGR rubber pipes
Post by scorpio_man on Jun 12^th, 2011, 7:27pm

Hi there

you might have the start of the cat blocking the exhaust.

hth

Title: Re: EGR rubber pipes
Post by lleewar on Jun 14^th, 2011, 12:10am

Scorpio man, I had a sneaky feeling someone was going to say that, but then again hoped it wasn't that :( The pipe blew off again today, well more like melted and split and the heat of the air blowing out of the egr pipe was baking hot. This all seems to have started after I found a three inch long crack in the top of the manifold and I sealed it with exhaust paste :( Lee

Title: Re: EGR rubber pipes
Post by Tompion on Jun 15^th, 2011, 1:15am

Lee

I had to replace the pipes on mine a while ago, initially one split & I cut the end off but it split again after a while, although it was still soft it had become fragile.

If yours have got like that & are leaking then they are likely to get hotter because the exhaust gas will flow through the pipe instead of just registering the pressure changes which in turn I would imagine could result in them melting.

I had some suitable size rubber pressure fuel pipe that I fitted instead – not had any problems so far with that.

Dave

Title: Re: EGR rubber pipes
Post by Simmo on Jun 15^th, 2011, 7:19am

'Young' Lee ;D, Have a look at This page (http://www.fordscorpio.co.uk/egr.htm) which may help.
You'll see that I picked this out from a Search (http://search.atomz.com/search/?sp-q=EGR&sp-a=sp100172f5) so you might wish to read through the other posts below it as they have a great deal of info. ;) Mike

Title: Re: EGR rubber pipes
Post by lleewar on Jun 15^th, 2011, 10:20pm

What I have found is that the pipes are coated inside with a white residue.
Dave, I replaced them with the ones form my other car and it shot them to pieces as well. I'm leaning to scorpio-mans suggestion that the cat is blocked, hence my other post about holding back, lack of power. Lee

Title: Re: EGR rubber pipes
Post by lleewar on Jun 15^th, 2011, 10:44pm

Mike, Thanks for the links, interesting stuff which brings me to a read done by pegasus at the last meet. Three codes came up:
1) P0141- Downstream heated oxygen sensor heater circuit failure Bank 1
2) P0402-EGR flow excessive at idle
3) P1406- Differential pressure feedback electronic sensor circuit downstream hose.
No2 means stuck open?
No3 hose fail
No1 ??????
Has the EGR failed or is failing. Could explain the holding back/lack of power??? Lee

Title: Re: EGR rubber pipes
Post by Tompion on Jun 15^th, 2011, 11:55pm

There shouldn’t really be any flow through the EGR at tickover.

You should be able to pull the vacuum pipe of the top of the EGR at tickover without it affecting the engine & you shouldn’t be able to detect any air/gas going in/out of the top of the EGR. Nor should you be able to detect air going into the vacuum pipe – if you can then there may be a problem with the EVR although it says here there will be some air passing:
http://www.fordscorpio.co.uk/egrsensors.htm

What happens is when the EVR is closed air is drawn in through its filter, as the EVR is commanded to open it gradually closes the passage to the filter & opens the one to the EGR.

With the engine off you should be able to lift the valve easily if you suck on the pipe at the top of the EGR & hear it drop with a clunk when you stop. If the diaphragms’ split you’ll probably get a lung full of exhaust so best done with an engine that hasn’t been run recently.

Even if the EGR valve does drop with a clunk it could still be leaking, you could try temporarily blanking off the pipe from the exhaust manifold with a coin where it enters the EGR to see if it improves the holding back/lack of power.

Title: Re: EGR rubber pipes
Post by Jonnycab on Jun 16^th, 2011, 4:29am

on 06/14/11 at 00:10:24, lleewar wrote:

This all seems to have started after I found a three inch long crack in the top of the manifold and I sealed it with exhaust paste :( Lee

Exhaust (Gun-Gum) paste isn't strong enough to seal a crack in the exhaust manifold. It needs to be welded/brazed or replaced :)

Title: Re: EGR rubber pipes
Post by lleewar on Jun 16^th, 2011, 12:34pm

Dave, did your suck test and got the valve clunk with, I might add, no exhaust taste at all even after it had been run!
With engine running, pulled of egr pipe and no change as you say.
What is P0141?

Title: Re: EGR rubber pipes
Post by Simmo on Jun 16^th, 2011, 1:44pm

Lee. P0141 is downstream oxygen sensor fault.The full list is Here (http://www.fordscorpio.co.uk/codes.htm). Mike.

Title: Re: EGR rubber pipes
Post by lleewar on Jun 16^th, 2011, 1:54pm

Thanks Mike, That's where I got the info from. I just don't know what is is or means ??? Lee

Title: Re: EGR rubber pipes
Post by Simmo on Jun 16^th, 2011, 2:31pm

Ok. Have you read This one (http://www.fordscorpio.co.uk/ho2smonitor.htm) then?. There are other 'buttons' on the left of the page which may also help. ;)

Title: Re: EGR rubber pipes
Post by lleewar on Jun 16^th, 2011, 3:51pm

Thanks Mike, I have changed the front sensor and still I have running problems. Looks like it's a cat change job for me unless there is something else I am missing ??? Lee

Title: Re: EGR rubber pipes
Post by Tompion on Jun 16^th, 2011, 4:04pm

on 06/16/11 at 12:34:38, lleewar wrote:

No taste after engine running - you shouldn't be able to draw much air out, just what's above the diaphragm.

I suppose if the cat is blocked the pressure may be able to lift the EGR – but whether it could do that before the rubber pipes come off I don’t know.

You could get someone to listen while you drive by, I think the hissing you sometimes get from a blocked cat isn’t always apparent to the driver.

Title: Re: EGR rubber pipes
Post by lleewar on Jun 16^th, 2011, 4:53pm

Dave, I expected some exhaust in the lungs after sucking the valve up, so I assume the diapraghm hasn't split as I had driven the car just before testing.
Maybe I should replace the pipes and see if they blow off again, hence cat replacement. Lee

Title: Re: EGR rubber pipes
Post by lleewar on Jun 16^th, 2011, 4:54pm

Is there a seal between the cat and the manifold?

Title: Re: EGR rubber pipes
Post by Tompion on Jun 16^th, 2011, 6:05pm

Yes I think it may be Mica, it sits in a shallow recess in the cat.

For the 2.3 the manifold gaskets are:

Scorpio 95, (+)"GB", DOHC 2.3 (145PS),4 Door Saloon, RHD
-Gasket (Cat-Manifold)
Part Number: 7046482

Scorpio (+)"GB" DOHC 2.3 (145PS) 4 Door Saloon RHD
Exhaust Manifold Gasket
Part Number: 7087454

Title: Re: EGR rubber pipes
Post by lleewar on Jun 16^th, 2011, 9:34pm

Thanks for the info Dave. Great for someone who has a 2.3 :) but mines a 2.0. Your now going to say they are the same aren't you ;)

Title: Re: EGR rubber pipes
Post by gozz on Jun 16^th, 2011, 9:39pm

I reckon they are Lee.

Title: Re: EGR rubber pipes
Post by lleewar on Jun 17^th, 2011, 11:11am

Have replaced the rubber pipes with new fuel pressure pipe, one at 6mm the other at 7mm. Lets hope they stay on as they are much more rigid. If no change in the running then it's cat off tomorrow. Lee

Title: Re: EGR rubber pipes
Post by lleewar on Jun 19^th, 2011, 12:10am

Update: new egr pipes stay on now, must have just gone soft. Took off cat today and I found my problem. The honeycomb had dropped about one and a half inches, obviously causing the blockage and causing the holding back I had been experiencing. Thanks for all your input, Lee