GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: dabill on 04 October 2007, 11:45
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howdie..
2ltr 8v gti, fast cams and machined b/e..
before any one says use the search function i have... so there!
right, start the car and it fires up everytime, idle is fine, until my oil temp hits 100degrees, then i get erratic idle, car is lumpy and horrible when sat, and the oil like flicks on everynow and again, but as i say, until its warm, not a problem... except sometimes the revs stick at around 1100rpm at idle.
car admittedly needs a tune up, and tappets need doing, but other than that, cant see any air leaks but not sure where to look, and its had a new blue temp sender, oil pressure sensors...
any ideas anyone? should i start with cleaning the ISV with carb cleaner? or could it be the MAF?
i understand the fast cams will cause a certain amount of lumpy idle, but its defiently getting worse...
cheers
rob
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If it's a Digifant, have you tried to replace the blue temp sender?
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i have done, but how do you check if its working propperly? is it run it upto temp, then unplug and see if it makes any difference?
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what's the water temp like cus 100degrees(for oil) is a bit hot mine neva goes over 94.??
how old is oil/filter.?
have you checked oil pressure switch.?
do you have a oil cooler.? is it blocked.?
or it could be an faulty idle valve.?
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haha, peaks at about 114 degrees for oil, but water never gets above just below 1/2... cooler might be shot...
oil filter is nearly new, had a change about 2 months ago. had new pressure switches (admittedly from euro car parts, but only cos the stealers guy is a spaz. and im gonna clean the isv out this weekend.
where is the idle valve located? and are they simple/cheap to change/fix?
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I wouldn't say 100 degrees for the oil is hot tbh. The highest mine got last night was 106 degrees and that was doing a ton for 20 minutes!
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I wouldn't say 100 degrees for the oil is hot tbh. The highest mine got last night was 106 degrees and that was doing a ton for 20 minutes!
true but thats while driving, anyway
check out
http://cgi.ebay.co.uk/VW-GOLF-MK2-idle-speed-control-valve_W0QQitemZ180164582798QQihZ008QQcategoryZ9889QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
(this not me just for you to see what you're looking for)
mk2/3 golf's use the same part. on a mk2 1.8, it's located on the rocker cover prob the same on a 2.0 with digi injection.
if it's working, with the bonnet open put hand though window N turn ignition on(all lights) and you should hear it click on, if not check wiring as connector may be corroded or a broken wire or faulty unit..?????
or you could just unplug connector whilst running idle. (LOL)
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right then, jus had a go at cleaning the isv, checked it was working before, by switchin ignition on, and touched it and could feel it vibrating slightly... so, off it came and had a good spray with carb cleaner...
put it all back together and it was still buzzing with ignition on... so fired er up and still not so ggreat idle... i unplugged the isv while the car was idleing and nothing happend at all, carried on with crappy idle... should it have made a difference?
bit confused now...
rob
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i have done, but how do you check if its working propperly? is it run it upto temp, then unplug and see if it makes any difference?
Yes.
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take a pic of engine. be a good start.
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looks exactly like a 1.8 digi engine, tis only the b/e thats different. and the boost valve.
just driven to work and engine seemed alot better to be honest, test will come on way how though, always get stuck in traffic... but it was idleing alot cleaner i must admit, so fingers crossed, the carb cleaner may have prevailed!
rob
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sounds f**ked to me( forgot to log out friend thought he could help, ignore this)
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what sounds f*cked? the ISV?
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only MK2/3 8v GTI ISVs are the same, 16v & G60 ones wont work. When the idle is poor check the idle switch is still clicking when the throttle is closed, and amke sure the throttle hits up against the stop firmly. If you havent already put a new VW ecu coolant temp sensor in then replace all your vac lines, then read my digifant tuning guide!
Don't forget the rubber bung for the breather valve (aka PCV or 'flying saucer')
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changed the rubber bung for a new one, changed the blue temp sensor, cleaned out the throttle body and checked all the hoses... only the isv and idle switch i guess to check, goto change the camshaft first though, stripped it off to changed the tappets and the shaft has several flat-spots... cant be helping, so thats this weekends job...
as for the ISV and throttle switch, i'll go to the scrappers and see if i can get one to test it with.
the ecu coolant temp sensor, is that the black one, or the blue one?
cheers,
rob
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thats the blue one :)