Poor Idle After Hard Drive, With Strong Petrol Smell?
Discussion
Just had the chim out for a good blast for an hour or so and it was running absolutely spot on. Came home, reversed on drive and I noticed that it felt a little lumpy when reversing, then was idling a bit lumpy, also noticed a smell of fuel but not massive. Turned it off and went and did other things. Came back to it about half an hour later to put it in the garage and when I started it it was idling really up and down and lumpy, but more worrying the smell of fuel was a lot stronger.
I left it running and lifted the bonnet to check there wasn't fuel spraying from a hose etc, but nothing, also nothing spraying underneath?
I have put it into the garage and left it for now.
Any ideas?
I left it running and lifted the bonnet to check there wasn't fuel spraying from a hose etc, but nothing, also nothing spraying underneath?
I have put it into the garage and left it for now.
Any ideas?
It could be the stepper motor sticking, this would account for erratic idle and may explain rich (fuel) smell as ECU may be trying to compensate if it's getting the wrong info, could be a number of sensors. Do you have Rovergauge ? if not you're welcome to borrow mine. Might be worth checking throttle bypass hose that runs from plenum (near throttle linkage to stepper motor housing), vacuum advance hose from distributor and for any potential air leaks generally. Also check fuel lines, particularly around fuel pump & filter (accessed best by removing n/s rear wheel) if the fuel smell is more prevalent at the rear of the car. If you fancy taking a ride over my way I'd be happy to take a look and see if I can help (I've promised to get the gardening done today !) or pop over to the Northants meet tomorrow at Sywell and I'm sure one of our number will be able to help.
Pulled the car out the garage just now and fired it up from cold, it is idling fairly ok but pushing loads of smoke out of exhaust when revved and also stinks of fuel. Opened bonnet and noticed that it must be pushing so much unburnt fuel down exhaust that is is physically dripping fuel from maniold where I have the gasket gone.
Geting worried now as obviously where I have fuel actually dripping onto exhaust I clearly can't drive it and have it stranded here now until I can resolve it.
Geting worried now as obviously where I have fuel actually dripping onto exhaust I clearly can't drive it and have it stranded here now until I can resolve it.
Just started it to put it back into garage and there is a trail of fuel on the floor, from underneath the NS, directly underneath the exhaust manifold area - which seems strange as it's not where the fuel lines are is it?
Somebody please help before I start writing the advert and surfing the web for 911's haha!
Somebody please help before I start writing the advert and surfing the web for 911's haha!
I have never had it happen, BUT, my thoughts are that IF this were to happen then you would be gaining OIL...(as a mixture of oil and petrol).
I would not want to run a engine that I suspected this of, I would pull plugs and look. REMEMBER that the biggest switch/point set in the car is the starter, hot exhausts can rarely cause a fire
ATM There is NO good advice I would post on here other than get a man in who can.
I DID have the air con fuel/heat ex-changer spring a leak and spray fuel onto the starter and as I turned the key... it went BANG!!! as and flames shot out through the bonnet vents, ONE COAT, a bowl of water and some singed eyebrows later it was put out!!
Adrian@
I would not want to run a engine that I suspected this of, I would pull plugs and look. REMEMBER that the biggest switch/point set in the car is the starter, hot exhausts can rarely cause a fire
ATM There is NO good advice I would post on here other than get a man in who can.
I DID have the air con fuel/heat ex-changer spring a leak and spray fuel onto the starter and as I turned the key... it went BANG!!! as and flames shot out through the bonnet vents, ONE COAT, a bowl of water and some singed eyebrows later it was put out!!
Adrian@
Could it be a leak from that side of the fuel rail/fuel regulator/return line that might find a route down via the exhaust manifold ? Might be worth checking the fuel regulator seal (same as the injector seals if I remember correctly. I have a spare seal if that's the problem, or readily available from the usual on line suppliers.
Richard 858 said:
Could it be a leak from that side of the fuel rail/fuel regulator/return line that might find a route down via the exhaust manifold ? Might be worth checking the fuel regulator seal (same as the injector seals if I remember correctly. I have a spare seal if that's the problem, or readily available from the usual on line suppliers.
Could be Richard, I have just read a bit about the fpr opening a diaphragm to allow the unwanted fuel back to the tank, so it was saying that if the diaphragm splits then it can't do this and you end up with a large excess amount which would explain it also. Where is the fpr located? Fuel pressure regulator is a tight push fit into the end of the fuel rail just below the plenum on the nearside (passenger side) to the right of the last injector (number 7 cylinder). The fuel return line then fits to the rear of the regulator (at 90 degrees to the fuel rail) and connects up to the copper pipe adjacent to the fuel feed pipe & hose from the tank. If you're unsure PM me & I'll give you a call.
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