GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: Nicky B on 05 March 2009, 20:23
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Got a 1.8 20v t that hesitates when driving and idle goes up and down,had it put on a diag machine and came back with 4 intermitent codes
Air flow meter
lambda sensor
fuel too rich bank 1
mapping error cooling system,check thermo stat and temp sensor
the guy cleared the codes and said someone may have been taking off plugs trying to find fault so put some miles on it and come back for another check
I'm gonna start by replacing the temp sensor,cheapest option first and quite a common prob by what I can see.
having a bit of a job getting the right sensor,should have the right one at lunchtime tomorrow so fingers crossed should sort things out
also have a hazzard switch on the way,indicators have stopped working ! I've only had the car a week and everything is going pete tong
brake pad indicator has come up as well now,someone knew when to get rid of their car eh!
any advice greatly needed !
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Sounds like the MAf to me :smiley:
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yeah I think maf too now,put the temp sensor in and no change,unplugged maf and the idle sorts itself,so got a maf on order.
also found a split vacum pipe to servo,got some over priced pipe and sorted that,it was bringing up traction contrl light
fitted new hazzard switch and have indicators again whoop whoop,so now I can start squeezing some extra horses out
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Also it is advisable to remove and clean both the throttle body and boost sensor, you should find the sensor below the inlet manifold on a hard pipe near the alternator
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:cry:well tried fitting a new maf today but actually made things worse,stalls when stopping.its a cheap non gen,got a feeling its no good!
yet when taking off the plug to the maf it idles lovely,its going into a garage for diags on thursday
traction control light coming on once in a while as well a pad wear warning,havent checked pads for wear but getting a feeling there is an electrical fault somewhere.getting fed up with it big time
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:cry:well tried fitting a new maf today but actually made things worse,stalls when stopping.its a cheap non gen,got a feeling its no good!
yet when taking off the plug to the maf it idles lovely,its going into a garage for diags on thursday
traction control light coming on once in a while as well a pad wear warning,havent checked pads for wear but getting a feeling there is an electrical fault somewhere.getting fed up with it big time
Where did you buy the Maf from? Ebay? eurocarparts?
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ebay,iternational parts ltd,could well be the europarts one boxed up with IPL !!!!!!!!!!
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ebay,iternational parts ltd,could well be the europarts one boxed up with IPL !!!!!!!!!!
Need to try a genuine one as so many people have had the same trouble as you :cry:
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i have a similar problem, is it ok to unplug the maf and run it to see if this is the problem, how far is it ok to run with it unplugged? few miles?
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its fine to unplug it, when I have on mine I cant get above 70 and it takes two weeks to get there so it doesn't stay unplugged for long :grin:
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OK changed the MAF,genuine.The idle is still up and down,driving seems better,so dont know what to do now,getting a bit stressed with all this now.
dont wanna keep chucking money at it and not sorting the probs,just haven't got the cash to spare!!!!
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have you tried cleaning the throttle body?
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Is it still throwing codes?
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yeah just lambda now I hope,was maf sensor and lambda sensor INTERMITTENT
but probs dont always throw up codes fellas also fault codes also come up when its a totally different problem,it aint that spot on,if TECH 2 (vauxhall) is anything to go by
a coil pack wont always show up as a fault code but needs replacing so Ive been told by a tech who had a cupra
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yeah just lambda now I hope,was maf sensor and lambda sensor INTERMITTENT
but probs dont always throw up codes fellas also fault codes also come up when its a totally different problem,it aint that spot on,if TECH 2 (vauxhall) is anything to go by
a coil pack wont always show up as a fault code but needs replacing so Ive been told by a tech who had a cupra
Hmmm true coil pack normally threw codes tho TBH.
Lambda faults are not normally caused by anything else :undecided:
Check the wiring to it as that sometimes can be a cause. :smiley:
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Take the lambda plug out and spray some contact cleaner or wd40 into it my mates was full of water and was having same prob as you
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Which lambda plug? theres two isn't there? front and behind cat????
idle seems a little better at mo,found wiring to coil packs broken and cracked,put some tape on for now,is this loom replacable?
throttle body seems ok what I can see without removing,a little oil in there tho.
so what to do??? get codes read again I spose with possible replacement of lambda
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:smiley: UPDATE..................I think I have sorted my problems,getting on for 200 quid later and the problem was the wiring to the coil packs,it was cracked and bare in places,so just insulated it all and bingo!
no pad wear warning coming up or traction control light,no hesitation and smoother idling
just wish I had done this in the first place,rather than putting on a new MAF,Temp sensor,spark plugs,Lambda sensor(not fitted yet!).would have saved a lot of heartache,money and stress.
Now I can start getting "The Slug" a bit quicker,cold air intake,remap and exhaust to start with
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yep defo buy OEM
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No ,the moral of the story is dont just buy stuff and put it on cos vagcom says so
the problem was sorted with £2 insulation tape !!!!!!!!!