GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: vw-john on 16 February 2011, 11:20
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1.8 abs,
it has problems starting in the morning, etc. it has never failed to start at all, but I'll be cranking it and it won't catch at all for a while, then it starts to catch and fires up and idles perfectly, accept for when I put my foot on the accelerator, then it becomes hideously lumpy and wont put the revs up seems the harder I push the accelerator the weaker it becomes and sometimes stalls. however after about a minute, seems to run fine
Plenty of power in the starter motor, etc. but it just seems like it is taking ages for the fuel to come through? Could it be that it is losing fuel pressure when the car is sat over night, etc. so it is having to pull it through from the tank again?
and I have changed the dizzy cap rotor arm ht leads and cleaned the throttle body, which was clean anyway.
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I have a similar issue with my gti 8v. sometimes in the morning it takes a fair few cranks to get it going. Once started tho, its fine. My last engine was the same. Dont know what causes it, but the fuel pressure issue sounds a likely case.
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fuel filter? can affect running when they're old and skanky
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I have a new fuel filter, makes no difference. Thanx for the advice tho. :smiley:
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Check the coil. Spray some water on it and get someone to check for sparks when revving it
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coil checked still problems...
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Check usual service parts ie dizzy cap etc
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I have new plugs, leads dizzy and rotor arm. :sad:
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as stated so do i. the problems just really annoying and i cant find anything wrong anywhere
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I wonder if anyone else has these issues or is it just us...
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try a temp sensor and also check the breather pipes
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i have new breathers, but not sure about the temp sensor so will go with that. Ta
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cheers, where is the temperature sensor? is it bolted into the rad?
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no. I think its on the right hand end of the cylinder head.
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im not sure it is on the abs. i have looked for it before =/ plus there is something bolted into the rad that looks like it could be a temp sensor lol
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what do you mean by abs? The item on the radiator is the fan switch I think.
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im not sure it is on the abs. i have looked for it before =/ plus there is something bolted into the rad that looks like it could be a temp sensor lol
No the radiator one is the fan switch, temp sender is on the head or the water outlet subjuct to engine.
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found it... now to find a replacement. eurocarparts dont seem to stock one for my engine...
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Have you checked the rubber flange gasket on the botom of the throttle body?They are prone to going on these,and makes the engine act like what you have described.They are just short of £20 from gsf.Check it by spraying some clutch or brake cleaner around the throttle body when it is on idle,if it surges or makes a difference to the idle then this wil be the problem.
But like i say it wont hurt changing it as they are a common problem.
Infact ive just changed the one on mine.
I have alsorts of spares for this engine so if you need anything(including a temp sensor which i have and works then gimme a shout)although you would be better off buying a new one for the sake of £8
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that flange your talking about, i replaced mine not too long ago as well the whole thing was disconnected didn't realize for about 15000 miles didn't seem to affect the running at all, and no difference when fixed, which i thought was unusual.
and ill keep you in mind when more of my sh!te breaks lol. ima give euros another try for the sensor.
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Yeah gimme a shout,i got a full head with inlet and hedgehog and exhaust manifold.Dizzys,new caps and rotor arms etc.Will be a full engine up for grabs as soon as i get the bloody thing out and a vr6 in. :grin:
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I had a 1.8 ADZ and had the same problem which turned out to be the coil. I couldn't figure it out because there was a spark on the King lead when the problem occurred so I also changed the fuel pump relay, the throttle mounting plate and coolant temp sensor.
It would never happen in the middle of the day cold start, just on early mornings which was weird. Used spark plug testers and noticed that the sparks were very very weak and got stronger after more cranking until it fired up. Apparently if the coil pack has a crack on it then dampness/moisture can settle in.
If you can, donor a coil when the fault happens. If you have done so already then hopefully the CTS will solve your problems as thats definately the next thing to measure. Have you scanned it for faults?
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Did you fix it? Mine has started jumping and losing power again. I changed the coil. Dizzy cap and rotor arm. Temp sensor near top of engine. Still to do plugs. Thermostat can't be working at all and open as car don't get hot unless sat running in carpark. Even then air out of heaters are barely warm. I have cleaned the throttle body using carb cleaner. Seems worse when damp and running hot. I'm actually now waiting for it to cool down as it's jumping like skippy