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    MK4 golf rough idle and sucking in gunk

    Na, the tyres are the right size. Pretty sure it's the wrong gear box. for example - The speed that the speedo says is definitely wrong, but the revs match the speed. so at 70mph on the clock I'm at around 3k rpm. but 70mph on my clock is more like 58mph. Also, my mileage is clocking up too...
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    MK4 golf rough idle and sucking in gunk

    Hey sorry sorry the lack of updates, Basically, I think that the EGR valve has gone, I've done several miles with it unplugged and the idle seems to be fine, once it's plugged back in and after a good little while, probably 50 - 100 miles the idle starts to roughen up. I think this is partly...
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    MK4 golf rough idle and sucking in gunk

    Ok, so here's the update... I cleaned out the MAP sensor and EGR sensor along with the throttle body again. Put it all back together and it was driving nice and the revs weren't bouncing around at idle (or at least that I could notice) I done a 300 mile round trip over xmas and now the rev...
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    MK4 golf rough idle and sucking in gunk

    Just some carlube stuff. £3 from Morrison's mate
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    MK4 golf rough idle and sucking in gunk

    Cleaned the MAF and EGR valves and gave the throttle body another clean. Both the MAF and EGR were filthy! It is definitely better but still not 100%. I think the engine may just be a bit gunked up and need a bit of a thrashing. I've put some fuel additive into a full tank of petrol and am...
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    MK4 golf rough idle and sucking in gunk

    I'll give it a go today mate. cheers
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    MK4 golf rough idle and sucking in gunk

    Took the air filter off once the car was up to temp and the revs were jumping around. thought it made a difference because the revs calmed down but later on, once the engine had cooled down I took the air filter off and drove the 3 or 4 miles home and the rev counter was still jumping up and...
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    MK4 golf rough idle and sucking in gunk

    Cleaned out the crankcase breather pipe but not had the crankcase breather box off to clean it. anyway. I've just done a 130 mile round trip and there's now no gunk coming from the breather pipe (for now anyway) but the cars idle is still jumping from about 600 to 800 rpm continuously. I plugged...
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    MK4 golf rough idle and sucking in gunk

    I've reset the system by disconecting the battery and I've got a little cheap diagnostics reader too where I removed any codes. the trouble is, the reader is for older vw's and the codes didn't tally up with any which are in the booklet. I think I've found the problem for the gunk though... I...
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    MK4 golf rough idle and sucking in gunk

    It's not a cable no. if dbw mean electronic then it's that
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    MK4 golf rough idle and sucking in gunk

    Hey people, Just as soon as I've got rid of one car and got another, I've got a problem with it again! It's a mk4 Golf, 2001 1.6L 16v. 110K on the clock I bought it from a dealer just over a week ago and it was taken in part exchange so I got a fairly good deal on it. It looked in decent...
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    Mk3 Golf failing MOT on emissions

    Just so you guys know, I replaced the head gasket and valve stem seals, put it all back together and I was buzzing on how well it went, started it up and now runs worse than before!!! I've bought a Mk4 Golf now so the old gal is off to the scrappers soon. Thanks for the help everyone! Joe
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    Mk3 Golf failing MOT on emissions

    one thing I did notice is that when I've got the rocker cover off and I turn the engine via the timing belt it sounds as though there is air leaking from the valves next to the distro cap... tried putting some oil over the gaps to see if any air bubbles would appear but no joy. Could be a...
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    Mk3 Golf failing MOT on emissions

    Only found one piece of info about the compression in the 1.4's and it said that it was at 150psi... Waaaaaay higher than what I'm getting. Hmmmm
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    Mk3 Golf failing MOT on emissions

    I done a compression test today and the readings are - Cylinder 1 Cylinder 2 Cylinder 3 Cylinder 4 Dry - 60psi 75psi 70psi 70psi Wet - 75psi 85psi 75psi 76psi Any thoughts on these readings? They don't look too bad to me but cylinder 1 does look a tad low and cylinder 2 a tad high. Was...
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    Mk3 Golf failing MOT on emissions

    Ok, I've just plugged a little diagnostics VAG reader that I got through the post today and it's coming up with an O2 sensor low voltage reading... Any ideas what that could entail? shouldn't be the lambda because it's a new one! Thanks!
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    Mk3 Golf failing MOT on emissions

    Yeah it stops when you take your foot off the pedal but only gradually as the revs come down, not instantly. I laid on the floor earlier to listen as I was pressing the accelerator pedal with my hand and it seems like it's coming from around the CAT area. As if the fumes are having trouble...
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    Mk3 Golf failing MOT on emissions

    hmm, not tried that. If I was to keep my foot on the accelerator and brake at the same time should it stop it then? Thanks again
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    Mk3 Golf failing MOT on emissions

    Hi obi_waynne thanks for the reply! Yeah it's so weird! No loss of water and no mayo anywhere. oil is correct and same I've always used, not missfiring at all, not that I can tell anyway. starts fine and runs fine. ever so slight judder on the rev counter but it is very slight, probably...
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    Mk3 Golf failing MOT on emissions

    I recently got my beloved VW Mk3 Golf MOT'd, I was considering scrapping it and buying something else but we've got a lot of history togetherso wanted to keep her going. Before The MOT I got 2 new tyres, tracking sorted and a whole new exhaust system because the Cat had gone (except manifold)...
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    Hey guys

    Hi there and thanks for having me! Got a few queries about a 20 year old beat up mk3 golf. Cheers!

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