GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Craigwilson on 19 April 2011, 02:16
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Ive had my golf for almost 11 years now last year i got a new engine it is the same engine (pb). Recentley it has has an intermittant missfire in 4th and 5th gear at around 3000rpm when i come off the throttle it stops and when i floor it it goes throught it. It only does it when the engine is warm and when there is less than quarter a tank of fuel in it, i also noticed the when it happens the voltage reading on the guage dropes to about 9volts.
I have replaced the plugs, plug leads, distributer cap, rotor arm, fuel filter, the MAF all the earths to the engine and box.
Can anyone help, any answers will be appretiated.
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its not engine related if the voltage drops to 9v, its electrical. what wire is the gauge connected to behind the dash?
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I had a similiar problem and it was the hall sender on the dizzy.
Worth checking?
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The voltage vdo is connected to an ignition live and the earth terminal under the steering colum im sure the isnt the problem though because the votage vdo has only been there for a few weeks the mis has been there for a few months
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Ill check the hall sender coz i was thinking it would be that but i never new that it would even start if is was the hall sender
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S
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Any news?
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what i meant was the vdo has picked up an electrical fault which is causing the missfire, not that the missfire was caused byn the vdo ;)
the voltage from the fusebox should never drop that low! go back to your VDO wiring and tell us exactly where you spliced it, and to what colours. then we can hopefully figure out why the voltage is dropping and so solve the problem
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Ive not got around to check it yet.
The vdo is connected to a thick red wire coming from the ignition barrel wich is only live when the ignition is on and is earthed to the body.
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My mistake it acctuall comes from a black wire from the ignition barrel which is only live when the ignition is on
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ok, this is the main ign live feed for the coil, if this is really dropping to 9v then that would explain everything! for a test, run a fused feed from the battery direct to the spare spade on the coil, on the side where all the other black wires are. take it for a few runs, if problem gone then i would replace the ignition switch.
you'll need to disconnect this wire from the battery before the car will turn off ;)
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Thanks alot ill giv that a shot at the weekend
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If the ignition switch is the problem would that explain why my starter fails sometimes and just clicks ?
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possibly yes!
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Gave it to a guy i know it was fueling it burnt the tips off the iridium plugs he took them out and the bores were full of fuel, now he cant get it started he said it could be the ecu but ive got a spare one
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Gave it to a guy i know it was fueling it burnt the tips off the iridium plugs he took them out and the bores were full of fuel, now he cant get it started he said it could be the ecu but ive got a spare one
If it has blown the ecu check all the earths before fitting another one.
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Any luck with this? Sounds like the same problem I'm having with mine at the moment.
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I changed the ecu from one i got at a scrappy it ran great the suddenly came back but i didnt check any earths before fitting.
I know some one with another mk2 im going to try my origional ecu in his and see if he gets my problem.
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Any luck with this? Sounds like the same problem I'm having with mine at the moment.
Non yet mecanic i know is working on it ill keep u posted
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All sorted!! Replaced the fusebox coz the wires in back were a mess and he thinks its what blew the new ecu i got. I tried my mates ecu in it and the injectors are working properly just need to find an ecu now.