Advice about pipes into plenum???
Discussion
I have two smallish ruber pipes coming out of the o/s inner wing along with air/con pipe,which go into the plenum on the o/s in front of the stepper. Can anyone tell me what these pipes do and where they go to? The reason i ask is because the one nearest the stepper looks to have been removed and still has the jubilee fitted but just floating about in the wind. The Metal pipe coming out of the plunum has a rubber push on sealed pipe. Anyone know what is going on here,does this pipe go somewhere else or has someone pulled this pipe off for some reason and blocked the plenum. Any help please cos bible not helping. Thanks...
I am now very unhappy because since re-conecting this pipe to plenum i have had a strong smell of petrol when driving about. The car at first was running fine, did about 60 miles and all seemed normal, untill the engine started to tick over a bit low and try to cut out. This got a little worse and started doing it nearly all the time and now cutting out. She starts back up every time and might be ok for about 10 mins but the problem strikes again. I have cleaned stepper, recently changed the leads and taken this pipe back off and put the blank back on the plenum, no better!! Can any one help...
Don't want to be blunt, but if the car is being maintained by somebody you trust you're best leaving this sort of thing alone unless you know what you're doing. It's possible the new problems are nothing to do with what you did, there are umpteen possible causes, but equally possible you've left it with an air leak, or without an air leak where it was supposed to have one, or broken something by connecting it to vacuum when it wasn't supposed to be. Not saying its likely but possible. Don't be shy about getting the professionals to sort it out.
Oh alright then....
Petrol smells tend to eminate from the rear, generally the rubber petrol pipe that leads from the brass union into the tank and goes to the pump, via a hole in the boot and a brass u bend to clear the suspension arm. Behind the passenger side. Tighten clips or replace rubber pipe, (Empty tank first.). If it's not that, and it's leaking at the rear, enlarge the hole a little and see if it's the rubber seal between brass union and ali tank. (assuming it's an Ali tank of course). If it's not that, and it's not the fuel return pipe behind the drivers side (in the boot), it's the tank itself and there,s a 4 week delivery...
If you ease the carpets back in the boot, sort of slightly to the right of the filler but at the bottom of the tank, you can stick your finger into the recess between the tank and the floor. If it's wet and/or smelling of petrol......
Petrol smells tend to eminate from the rear, generally the rubber petrol pipe that leads from the brass union into the tank and goes to the pump, via a hole in the boot and a brass u bend to clear the suspension arm. Behind the passenger side. Tighten clips or replace rubber pipe, (Empty tank first.). If it's not that, and it's leaking at the rear, enlarge the hole a little and see if it's the rubber seal between brass union and ali tank. (assuming it's an Ali tank of course). If it's not that, and it's not the fuel return pipe behind the drivers side (in the boot), it's the tank itself and there,s a 4 week delivery...
If you ease the carpets back in the boot, sort of slightly to the right of the filler but at the bottom of the tank, you can stick your finger into the recess between the tank and the floor. If it's wet and/or smelling of petrol......
I don't know that much about the carbon cannister - but maybe this disconnected pipe was disconnected because the cannister was buggered, hiding the symptoms you now have. I think the cannister is for emissions control only, not performance/running issues.
I could be talking b0110cks but sounds like the cannister is buggered.
But like Peter says - take it to a garage who knows Rover V8s and he'll suss it out for you. Best not to mess about when there's a smell of petrol.
From a safety viewpoint before you get to a garage check the flexible fuel hoses at the back of the engine bay - there is a short flexible section between the solid pipes and where they enter the injection system - these can perish and any leask will drip onto the exhaust manifold.
Had mine replaced a while ago as a precaution 'cos I didn't like the look of them.
I could be talking b0110cks but sounds like the cannister is buggered.
But like Peter says - take it to a garage who knows Rover V8s and he'll suss it out for you. Best not to mess about when there's a smell of petrol.
From a safety viewpoint before you get to a garage check the flexible fuel hoses at the back of the engine bay - there is a short flexible section between the solid pipes and where they enter the injection system - these can perish and any leask will drip onto the exhaust manifold.
Had mine replaced a while ago as a precaution 'cos I didn't like the look of them.I have had a play about with the car today and have removed the carbon can which looks brand new and cheked the electrical plug which also looks ok. I have looked in the bible to see when the solenoid for the carbon can has power going to it. There does'nt seem to be any power going to it when the ignition is switched on or when the engine is running, only .5 of a volt. I have also taken the roll over valve out and am presuming the pipe going from the valve goes straight to the carbon can. If it does then it is either blocked or there is something else the pipe goes through because i cant blow or suck through it. I am wondering if this may be the problem. Im sorry if i might be getting on everyones t#ts about this but i am determined to get to the bottom of it. Thanks for all recent comments or any i hopefully recieve for this.
The carbon can has 3 pipes:
one from the fuel tank
one to the engine inlet manifold
one that vents to atmosphere near the radiator
The carbon can stores up petrol fumes that vent from the tank. Under the right circumstances (controlled by the ECU) the valve on the carbon can opens and the vapour gets sucked into the engine inlet manifold.
When the ECU opens the valve on the can, it also possibly changes the fuelling slightly to compensate for the extra fuel going into the engine. If you disconnect the can totally then it may have an effect on fuelling - you may get lean points.
I don't know when the vent pipe comes into play, maybe on malfunction.
The cans are quite robust -- the best thing is to check that the valve works and leave it alone.
If there is a running problem then disconnecting the can might just be hiding the issue and it may be more expensive to rectify later (I am thinking of the cats for example).
Dan
one from the fuel tank
one to the engine inlet manifold
one that vents to atmosphere near the radiator
The carbon can stores up petrol fumes that vent from the tank. Under the right circumstances (controlled by the ECU) the valve on the carbon can opens and the vapour gets sucked into the engine inlet manifold.
When the ECU opens the valve on the can, it also possibly changes the fuelling slightly to compensate for the extra fuel going into the engine. If you disconnect the can totally then it may have an effect on fuelling - you may get lean points.
I don't know when the vent pipe comes into play, maybe on malfunction.
The cans are quite robust -- the best thing is to check that the valve works and leave it alone.
If there is a running problem then disconnecting the can might just be hiding the issue and it may be more expensive to rectify later (I am thinking of the cats for example).
Dan
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