GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: smithysmoo on 12 December 2007, 16:34
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Mine is showing something between 6-8mpg obviously wrong big time as I'm not filling up every five minutes.... Any ideas how to get it more accurate or what might be the problem.
cheers
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could be the vacuum hose on the back of the clocks has fallen off, or is doisconnected in the engine bay. Do the avg speed & miles travelled settings work on the MFA along with the rev counter?
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Yep all the other settings seem to work ok..... Will check in the engine bay then and see what I can come up with.... Otherwise suppose I gotta try and take the clocks out.
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Mine was exactly the same, it was the vacuum hose that is attached to the pipe on the top right hand side of the inlet manifold had become brittle and cracked, although mine ran like a bag of spanners aswell. Renewed the hose and et voila.
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i got that problem too. but i have the metrical mfa. the mfa fuel usage reads 15.5 l/100km but if i calcuate it myself its between 10 and 11 l/100km. so it lies about 5 l/100km. are in my case also the vacuum pipes or something else?
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Same as what mine was doing. Found out that somebody had disconnected the vacuum hose from the engine and corked the ends. No idea why.
Once re-connected, my mpg read 30 (ish) instead of the previous 8.
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Well found a clear plastic tube that ain't going anywhere so I'm guessing this is it. But where do I connect back to. Anybody got a pic or something. Cheers
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I'm not sure what engine yours is, but i think the hose you mean plugs into a black pipe on the right hand side of the inlet manifold, slightly above and to the right hand side of the breather on top of the rocker cover in this photo
(http://img375.imageshack.us/img375/3434/engineew8.jpg)
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Yeah thats my engine and looks like my car except yours is cleaner. Only had mine a couple of days and ain't had chance to get it spick and span..... is it the bit where I can see like a yellow connector as this is where I thought it should go. There are a couple of holes that could be the ones but they are covered up.
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Thats the one, i think you should see two vacuum pipes, one will be bunged (they are all like that for some reason) and the other is where your hose wants to be. (by the way, its not my car either, i wish mine was this clean but it was the first PB engine pic i could find in the projects section :D)
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cheers buddy will check it out...... :smiley:
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heres mine, better pic of the yellow thingy, its mostly MK3 GTI now but you get the idea :grin:
(http://vwtech.no-ip.info/images/golf/engine2.jpg)
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Connected with a bit of rubber tube left over from my old Bay window camper washers and seems to be working. Only did a couple of mile and it went up above 15mpg when previously it hadn't got past 8.... :smiley:
Rubjonny is that the ISV that sits just in front of the inlet manifold below the throttle cable???? All I need to sort out now is my weird high revving problem.
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yep thats the one, ignore the way mine is plumbed in though as I had to swap & change with the breather hoses to make it all fit nicely with the 2.0 rocker cover :)
High ide issues are often caused by the idle switch not clicking when the throttle is closed, the wiring to the throttle switches snapped behind the throttle body and/or the throttle cable being fitted too tight, the linkage should hit up against the stop firmly :)
Check out my digifant tuning guide once the throttle switch & cable check out ok!
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Cheers buddy you got a link to that guide.Only does it on start up though after a couple of mins driving it idles perfect.
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Golf mk2» mk2 maintenance + info» HOW TO: Tune your Digifant ;)
http://www.golfgtiforum.co.uk/index.php?topic=33253.0
Worth replacing the ECU temp sender with a newun from VW, on post 88 cars its blue on pre88 its white. on my piccy you can see the blue plug for it in the coolant flange on the front of the cylinder head.
The parts dude might try to tell you the blue one is only for cars with a CAT, ignore him and buy it anyway ;)
Only change it when the car is cold, else coolant will spray everywhere :grin:
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Cheers buddy, will look into it when I get a mo... Is it not likely to be the ISV then thats causing my issues??
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it could well be, but I'd try the other stuff before you mess about with it. Best way to clean em is by submerging in poetrol whilst its plugged in n buzzing, swish it around tillthe black gunk stops coming out. Spray some kind of spray lube in each hole to re-lube it and refit!
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Cheers mate, just had a look at your other page aswell, will hunt out a co2 meter before I have a go at that. Ebay here I come....Also will get that ECU temp sender next time I'm down VW.
Cheers for all ya help.