GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: car_maniac on 16 November 2012, 17:56
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The car... an ABF in my mk2 :cool:.
On the motorway it runs perfectly fine
It also runs fine when starting from cold in the mornin, the problems happen much much more when running for 5-10 mins.
Setting off from traffic lights it misfires, sounding like a subaru
When cruising along at 40 in 5th it's usually fine and runs smooth but if i put my foot down it goes into subaru mode and the same happens if the road starts to incline, meaning I have to gear down due to the loss in power
I've heard something about vaccum pipes or something like that might cause this??
Any help would be much appreciated :smiley:
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Sounds like plugs to me.
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Can the plugs cause an intermittent misfire though...I thought that would've be an all the time or none of the time sorta thing?
Think I might go get some tomorrow though to see if it sorts it.
Any other ideas if that isnt it?
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Yes
And coil. Most likely to be coil to be honest. Common thing on the abf
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http://www.ebay.co.uk/sch/i.html?_trksid=p5197.m570.l1313&_nkw=abf+coil&_sacat=0&_from=R40
Is this the sorta thing?
If so I hope it is the plugs!
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No. Lol
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Thank the lord lol :rolleyes:
Any idea where to look for one or a link to one?
Is there more than one type as in for early or late abf's
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http://www.ebay.co.uk/sch/i.html?_trksid=p5197.m570.l1313&_nkw=Mk3+golf+2.0+16v+coil&_sacat=0&_from=R40 (http://www.ebay.co.uk/sch/i.html?_trksid=p5197.m570.l1313&_nkw=Mk3+golf+2.0+16v+coil&_sacat=0&_from=R40)
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got a coil pack swapped it, same shizz.
What size socket do i need to swap the plugs?
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To be honest i dont think the plugs will help anything but going to do it anyway now ive got em
if it helps...the car turns over fine if i turn it off and back on again but about a minute in then it starts getting lumpy...
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Check distributer and arm.
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So does the car do this only when hot?
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To be honest i dont think the plugs will help anything but going to do it anyway now ive got em
if it helps...the car turns over fine if i turn it off and back on again but about a minute in then it starts getting lumpy...
Misfire under load, tends to be ignition related. Please check your plug leads. It maybe the resistance in the wire is built up over 12kOhms or the plug reach down the plug holes has broken down and is leaking spark.
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On tickover when it first starts up it turns over fine.
Even if ive been driving for an hour and the idle is lumpy if i turn it off and start it up straigh away the problem goes BUT it starts again after a minute or so...seems like some sort of sensor maybe?
*Swapped the plugs* pretty much the same (but they were fook'd)
Something that might give ideas...
If i drive in second @1000rpm and put my foot to the floor it misfires while accelerating, i lift of completely when i get to around 2100-2500rpm and do the same again it takes iff like it should with no misfire
If i keep my foot down from 1000 more ifter than not it will just keep misfiring and sometimes its like flipping a switch from a subaru to an abf....
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Try a new Ecu relay
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Which relay will that be?
Do you know what number or which position it will be in?
Theres a pic of where all the relays plug into if you search on here for
"help solve my mk2/mk3 wiring please"
A guy took a picture of his fuse board, i guess this may help pointing out where it will be
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Ecu relay 30 and fuel pump relay 167 you cant miss them,i had similar symptons to you and replaced the ecu relay,job done :wink:
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THE first thing to check on an ABF is the ECU relay.
You can test it first before you spend the huge amount of 12 quid on one.
Run the car for a while, either drive it or just let in run for 15 mins.
Stop, take out the relay and see if its warm, put it to your cheek is best.
If warm its ok if cold on any side then replace and that will be the source of your problem.
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Have this on my 8v, will get on the relay check! Assuming it's the same issue.
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swapped em...no difference :sad: any other ideas??
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have you changed vacuum lines as i mentioned earlier? old original rubber can collapse under vacuum
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No not yet.
Is it a diy job with a few spanners 'cos i have no idea about that?
An online guide somewhere maybe?
If they do colapse is the engine still able to run smoothly at times and/or go from that to misfiring like turning a lightswitch because that what its like driving it.
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Yes DIY. Very easy, Buy it from ebay 3m should do it.
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4mm or 5mm
is there any guide on where they are supposed to go to and from because i dont have a clue on this?
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3mm id.
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The long hose up to the ECU is a favourite as it has to pass through the skuttle and can get compressed there.
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is the ecu below the windscreen infront if the passenger?
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just wondering what relay is equivalent to no 30 on the 1.8 AAM automatic engine?
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is the ecu below the windscreen infront if the passenger?
Should be
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just swapped the vacuum pipe...no difference
So far vacuum pipie, spark plugs,coil pack, ecu relay (doubt it will be the fuel pump relay or ignition leads) have been swapped.
Any other ideas?
I think I said before, it misfires accelerating (even less than 1/4 throttle when properly warm sometimes) from low revs but if i lift off then put my foot down again it goes fine
it will do it pretty much any time i floor it though, goin from low or high revs, hot or cold
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There are other vacuum pipes! Look around the manifiold.
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just swapped the vacuum pipe...no difference
So far vacuum pipie, spark plugs,coil pack, ecu relay (doubt it will be the fuel pump relay or ignition leads) have been swapped.
Any other ideas?
I think I said before, it misfires accelerating (even less than 1/4 throttle when properly warm sometimes) from low revs but if i lift off then put my foot down again it goes fine
it will do it pretty much any time i floor it though, goin from low or high revs, hot or cold
Change every vacuum pipie on the engine of that size :grin:
What plugs do you have and have you tested the colour of the spark at plugs and coil king lead?
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how do you insert a pic into this cos it may help...ive no idea where the other vacuum pipes are.
found one short pipe that goes from the drivers side of the inlet manifold abive the rocker cover to some silver circular thing infront of the rocker cover and between the firt two branches of the inlet manifold.
i squeezed it with the engine running and it made no diff (dont know if it should) but if i do the same with the kne going to the ecu it stalls, which seems normal...
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the plugs: bosch plus yttrium, brand new
dont kniw what you mean by testing the colour of the spark though.
I would have thought if the coil king lead was at fault the problem would be consistent though?
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To be honest i dont think the plugs will help anything but going to do it anyway now ive got em
if it helps...the car turns over fine if i turn it off and back on again but about a minute in then it starts getting lumpy...
Misfire under load, tends to be ignition related. Please check your plug leads. It maybe the resistance in the wire is built up over 12kOhms or the plug reach down the plug holes has broken down and is leaking spark.
So car_manic, have you tried the about suggestion yet?
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just tested the leads now n the highest resistance i got was 18k Ohms and the lowest was 14
i guess this means i need new leads?
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11.3 on the lead coming from the coil pack
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Swapped the leads n it worked :laugh:
Thanks v.much especially Wolf R...should have taken you up on that sooner, still kinda baffling how they affected the engine though!
I'll be back with more Q's soon :cool:
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I knew it was ignition!
Should of started with leads and not plugs and coil, but at least they are replaced too.
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Swapped the leads n it worked :laugh:
Thanks v.much especially Wolf R...should have taken you up on that sooner, still kinda baffling how they affected the engine though!
I'll be back with more Q's soon :cool:
You are welcome.