GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: bjsj on 06 October 2005, 22:49
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my 1999 2.0 gti is sick! the computer is telling me that i'm averageing 16mpg, there is a strange petrol/cataylist smell wwhen idling or just as it is switched off and there is black bits with water coming from the exhaust. i suspected and blown head gasket as they was some gunk in the filler cap, but my local garage says the head gasket was ok and sent me on my way. could anyone shed any light on this? the smoke isnt blue so the rings must be ok, its not using a dramatic amount of oil or any water so can anyone pleae help as i am thinking of getting rid as it is wrecking my canister!!!!
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same as my 1999 2.0l... its overfueling....run some red-ex in the fuel, you mite need two treatment but it works a treat! stops the bad smell,soot and smoke from the exhaust and mpg improved alot, as ive been told my fuel pressure reg is fooked and the lamada sensor is fooked too which is the cause of the problem.
You can get red-ex from halfrauds for 99p for one treatment, the first one i used, i used a little stronger than recommended i.e one little bottle to half a tank of fuel instead of a full tank, then when i needed more fuel, bought another bottle of red-ex and added that to a full tank of fuel.
Give it a try and let us know what happens :wink:
p.s make sure you pick up the petrol injector redex, should be in a white bottle with green writing.
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the first one i used, i used a little stronger than recommended i.e one little bottle to half a tank of fuel instead of a full tank, then when i needed more fuel, bought another bottle of red-ex and added that to a full tank of fuel.
:shocked: as useful as redex is for freeing up injectors.. the guidlines are there for a reason. Any kind of oil in your fuel lowers it's octane rating considerably.. push it too far and you get detonation :undecided:
By all means try redex, but follow the instructions :grin:
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ive not had any "side effects" from putting it in a little stronger on one occassion tho, trust me it was bad, i needed it lol.
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ta lads will get some tommorrow, iv'e already changed the maf sensor and im not sure weither it needs a coil pack
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well check this out, my car has "fixed itself" i was talking to my wife in the car about selling it and the next day after the home tune man came out, the mpg has improved to a better state than it was when i bought it. can some genius explain that? maybe the computer had a fault which the nice man reset for me
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mine does that, its running fine at the moment, but every so often the black smoke appears and its off to halfrauds for some redex :sad:
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Hey guys im new to the forum and just brought myself a 2000 2.0 GTI and i have very similar problems, a bit of black smoke if i give it a good rev and the smell is also there when idling...
Just had the MAF and Temp sensor changed a couple of days ago.
Did the Redex sort it out??? Dont wanna spend any more money on it but its eatin WAY too much petrol 15-18 MPG while driving really sensibly!!
Please Help. :cry:
Thanx
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yes the red ex helps loads but it is only temporally.. mine lasts for just over a month then the soot and smell come back.. iam hoping my mates, sisters, friend who works at vw can get me a new fuel pressure regulator on the cheap lol
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did the fuel pressure regulator fault show up on the VAG COM??
Cheers
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ive not connected my car up to vag com so iam not sure if it will show up or not, but a while back i had my car put on a dignostic machine to find out what the problem was and its because the car is over fueling, because the fuel pressure reg was knackered and the lamabda probe was not sending the correct readings, which the guy said to me could either be knackered as well or its covered in soot, and he recommended that i run some red ex threw the engine..
Ive just had to run 3 shots of Red-ex again in mine as it started sooting up and my fuel tank just emptyed, it went threw £40 worth of fuel in 4days, and i hardly went anywhere, now the red-ex has kicked in. I drove 80miles the other day and it hardly used any fuel..
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petrol injector redex it is then, are they the small bottles that they usually have near the tillpoints??
white with green writing, ill follow your instructions and look for that i guess..
ill let you know how it goes, ive read that mine might be a vaccum leek, if you read my other post describes exactly what happens..
http://www.golfgtiforum.co.uk/index.php?topic=29952.0
Cheers
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yes thats the one.. you can buy them for 99p for one treatment, mite need to run a few threw depending on how sooty the engine has got..
Cheers, i'll give your post a read..
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Thanks god everything in life isn't as unreliable as a Volkswagen.
Seriously, I was told by well informed engineers that REDEX and other additives are just a way of making chavs part with extra cash at Halfords in a vain attempt to boost the power of their 1.1 Renault Clios. If you can seriously notice the difference, your car must have BIG problems or its the old placebo effect. If you are really getting 15 mpg on sensible mixed driving, there is a big problem that would show up immediately to any half decent mechanic. the 2.0 was never particularlt economical in my experience (2.0 bora and mk3 gti) but should be good for 30mpg
Cars that are 4 or 5 years old surely shouldn't have all these problems?? I think i'm going to return to the company car scheme, must only be a matter of time until my 1.8t has all these problems..........
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but the red ex is only a fuel cleaner.. it doesnt make the car go faster!!
all that is wrong with my car is the fuel pressure reg, its throwing to much fuel in the engine and making it soot up, the red ex just keeps the soot under control.. other than that my engines fine.
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:sad:
Hi guys,
Ive got black soot and bad mpg as well.Maybe its the regulator but then in my experience the regulators do not fail easily.
I have a 1990 8v GTI from the UK and a 1973 beetle fitted with a fuel injected engine from a car year 1976.the regulator is still the original one.Has not failed yet.Also my golf MK2 has over 300000 miles.Still uses the original injectors and stuff except the airflow meter.
Maybe the problem with this is that the O2 sensor is off and giving wrong signals to the ecu,hence much richer fueling.Also some where in the US Vortex,told to change the temp sensor to a new type with the corrections already in the temp switch.Must try and see this.
Let me know if any one has.
Regards
Ramjetvw
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well mine had a new MAF a year ago and a new temp sender unit few years back..
i would like to link up a vag com and see if anything comes back on it.. but i cant afford the software and i dont know anyone who has one that i could borrow :sad: