Car mis-firing

[Irn-Bru]

P-reg Toyota RAV4.

Ok, I will start off by saying I run the car entirely on recycled petrol, which is just random petrol taken from scrap cars, so this of course means it could contain all the crap from bottoms of fuel tanks, diesel, water, alsorts basically. So you can safely say the problem is due to dodgy fuel. I've tried changing the fuel filter which has made the car more drivable but it feels like its running on 3 pots under hard acceleration or even just normally, it's a bit random.

Suspects:

Fuel pump
Injectors

Anything else? If it's not a cheap, easy fix I will just crush the fecker which is a shame as it's quite a minter for its age and mileage (141K). The lack of power while it's misfiring is really annoying and probably destroying the engine.

I have ran alsorts of cars on the same fuel and all I've needed to do is change the fuel filter a few times per year but they have not had anywhere near as as high mileage car as this one.
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KTM 990 SMT & Suzuki DR-Z 400 SM

[P.addy]

Could you try the quick fix of some unleaded rather than piss in a jug?

[Irn-Bru]

It would just mix in with the other crap in there though. Also forgot to say have tried injector cleaner in the fuel too. The bottom on my tank probably looks like the bottom of the ocean
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KTM 990 SMT & Suzuki DR-Z 400 SM

[Copycat73]

the fuel has probably lost most of its additives... you could try altering the spark timing... if that's possible.. closer to tdc.
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Whatever I post I have no citation and no intention of providing one..
caveat emptor

[Irn-Bru]

Too fancy :p I reckon my next step will be to check the plugs and pull the fuel pump out, I suspect the filter on that will be rotten.
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KTM 990 SMT & Suzuki DR-Z 400 SM

[Andy_Pagin]

Misfires tend to be leccy problems in my experience.
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the men in white coats are coming to take me away.
Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer

[Irn-Bru]

yeah but if you saw the state of the fuel I feed this car you would understand it has to be fuel related Actually here's a pic of what came out the old fuel filter, bearing in mind this had only been on the car for around 2,000 miles:

https://i.imgur.com/1gGILwu.jpg

The petrol is actually filtered after being removed from the old cars but it's not really enough, but for the price I pay I won't complain
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KTM 990 SMT & Suzuki DR-Z 400 SM

[Andy_Pagin]

Considering the high mileage I'd change the fuel hozes, they could have collapsed internally, and maybe fit two fuel filters. Failing that It's either the fuel pump getting a bit weak (had this with classic landrovers) or the constant diet of what looks like Bovril has knackered the injectors.
____________________
They're coming to take me away, ho-ho, hee-hee, ha-haaa, hey-hey,
the men in white coats are coming to take me away.
Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer

[sidewinder]

Coil pack

[Copycat73]

[Irn-Bru]

Well it looks clean in the 5 gallon drums its supplied in My old fiat ran perfectly on that stuff even when some gimp at the garage mixed diesel in with the petrol, just was a bit smokey
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KTM 990 SMT & Suzuki DR-Z 400 SM

[stevo as b4]

Fook me that's nasty shit your feeding your beloved Rav4!

I've got 1/2tank of V-power in my car that's been sat for 7months. You can come and have that if you want, as I'm not sure I want to be using 7month old petrol in anything other than a lawnmower engine?

[Irn-Bru]

If I lived closer I'd be over with some hose pipe and some containers

Have cleaned the tea bag filter on the fuel pump today, it was absolutely filthy and looked like the fluff catcher thing on tumble driers... and yet the car still runs like crap Must be the injectors, which aren't as cheap as I thought originally, only paid £150 for the car not really worth bothering with.

pic:

https://i.imgur.com/rv8FucU.jpg

Annoys me that it was so dirty and the car still runs the same, you'd think it would improve some what.
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KTM 990 SMT & Suzuki DR-Z 400 SM

[Wonko The Sane]

spot of redex to get additives back into the fuel that's there, top it up with fuel from a petrol station to try and dilute the recycled fuel that's in there.

My 125 was a bit stuttery when I was using fuel that had been sat in a spare fuel tank for some time, chucked some petrol station fuel in it and it was happy again.

[P.addy]

I've just thought, for a guy with such good taste in bikes, expensive sumos and the like, you really are one cheap bastard

[Irn-Bru]

[P.addy]

It probably wouldn't run.

What I would do is whip the injectors off into a bath of redex or injector cleaner...neither of which I'm sure do much and just give them power to work through a spare battery or some shit, let them clean themselves in that scabby mix

[Irn-Bru]

They are pretty well hidden away, looks like a lot of work for something that probably won't work

We changed the fuel pump today, with a Vauxhall Corsa one oddly enough. That made no difference though.

I am a bit confused as to why there's been no engine management light on what so ever... It would make life a lot easier.
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KTM 990 SMT & Suzuki DR-Z 400 SM

[wodge]

How about cleaning the Mass air pressure sensor (if it has one).
Usually abbreviated to MAP sensor it should be located somewhere on the exhaust manifold. If it is really dirty with carbon or crap from your fuel it will run with the wrong fuel/air mixture.

Cost nothing more than a bit of time...!!

wodge

[JonB]

Why don't you just drain the tank and stick a tenners worth of proper fuel in? If it then runs well then you have isolated the problem.
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Be careful whose advice you buy, but, be patient with those who supply it. Advice is a form of nostalgia, dispensing it is a way of fishing the past from the disposal, wiping it off, painting over the ugly parts and recycling it for more than it?s worth.

[stevo as b4]