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Model specific boards => Golf mk4 => Topic started by: lewy20004 on 26 October 2014, 13:53
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hope someone can point me in the right direction.
Yesterday me and the kids went out for a drive in the 20v drove lovely for 20/30 miles stopped off for a bit.
then on the way home along the motor way the car started to judder under acceleration then started firing on 3 cylinders, but kept going back to firing on 4 just really temperamental.
Managed to limp it home, stuck it in the garage until this morning i checked all connections,fuel pump still priming but will only fire on 3 cylinders today.
fuel starvation maybe (blocked injector/filter) didnt change filter in service :whistle:
today i swapped the coil packs over and im getting the car to tick over but as soon as you start to rev it coughs and sputters
i disconnected in turn the coil packs and the engine noted changed to all 4 and wanted to stall
also disconnected in turn the injectors and same problem.
could this be either a fuel issue. ie change the filter or vacuum maybe
all comments welcome
thanks
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I'd try looking for a vacuum leak before you start spending money, something has probably popped off somewhere
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So today i went out to the car
Tried to start it. Its starts but runs very ruff for 10 sec then dies.
I checked the everything for something loose and nothing.
I fitted a new filter thinking it maybe an old filter or something
Still the same.
I have no idea now.
I got some coil pack coming now just to play it safe.
I also heard that the coil pack wiring can become brittle. Is there anywhere i can purchase a replacement
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Where do you live? perhaps someone with a VAG-COM can pop over and scan your car for issues.
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If they could that would be amazing.
Obviously a few beer tokens for the person that can help.
I am running emerald k3 ecu would this still connectto vagcom?
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Sorry I'm in ashford kent
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What have you got that on it for? I have no idea if it would connect or not because i've never seen or heard of anyone using one
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Thats how i brought it im afraid.
Have no idea of the benifits all i know its been on for about 5 years
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It looks as if it is a Piggyback ECU where you can program it to how you like, which is a bit stupid because the ecu already fitted could be remapped and everything anyway
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I have a set of coil pack being delivered today. Im just praying that cure it.
But imjust guessing now.
ECU could be at fault
Ive even thought the tesco fuel could be at fault :lipsrsealed:
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a coilpack beginning to break down can be fine on idle then struggle under load. biggest drawback of aftermarket management right there.. limited onboard diagnostics. The ME7 ecu would have told you not only how many misfires per rotation there are but also which cylinder it's occuring on. If you want the car to be reliable it might be worth looking in to swapping back to factory management with an immobiliser defeat.
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I think thats what im going to need to look into.
I dont see the benifits of having the emmerald over a remaped standard.
Also ive noticed today i can hear a kind of ticking. Like a kind of relay type ticking
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You sure it isn't the charcoal canister ticking? Because that's normal if it is.
If not then maybe a blocked tappet
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Hate waiting for parts. especially when you pay for next day and nothing shows.
i have the coils just waiting on the radiator bits and more boost pipes. (i thought while it was off the road may aswell do some other bits that needed doing )
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I have absolutely no idea whats going on with this lemon scented car
I've replaced coil packs I've checked all the vacuum pipes. I'm getting no smoke looked at all the wiring. cant Vag com it. as for stupid Emmerald im lost with what to do. only thing im thinking is doing a compression test. but surely the car would smoke... however it does smell rich now
To be honest I'm loosing the will and just about to smash it up with a hammer. (at least i would get some pleasure out of my short time ownership)
Dry compression test results
cylinder 1=105psi cylinder 2=105psi cylinder 3=95psi cylinder 4=100psi
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It's probably a bit late now as you've spent your money, but if I were you I would buy a cheap ebay vag com for around £10 and test it yourself
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vag com i believe wont work with emmerald management.
i think i have a injector issue.. i ran can again and individually took wiring off for each.. 1 ran for 2sec then died so did 2/4
3 ran longer then did what the car did before and just died.
fingers crossed its injector
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Well the report came back saying all 4 injectors are fine.
I now need to some how test the wiring to the injectors. (any ideas)
And the other thing i need some advice on. is when i brought the car i noticed the previous owner had a oxygen /lamda sensor fitted but it wasnt connected which i did.. and car still ran ok. but just thinking it was unplugged until it was remapped or something
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Ive have no idea what to do.
Ive tested injectors = fine
tested coilpacks = fine
i now know no3 cyclinders 100% at fault. i can run car and unplug both coil and injector and car still runs (no change) but if i remove and of the others even just one.. can stalls instantly.
Is this a wiring issue?
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could be wiring, but you can swap the injector and/or coilpack around to a different cylinder to see if the misfire goes with it to determine that. Compression test results look fairly low across the board to be honest on all 4 cylinders even for a dry test.
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You checked the spark plugs?
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yes mate brand new ones.
even put the old ones back in to see if it was the new ones..
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could be wiring, but you can swap the injector and/or coilpack around to a different cylinder to see if the misfire goes with it to determine that. Compression test results look fairly low across the board to be honest on all 4 cylinders even for a dry test.
yeah i would agree ideally want 180ish i would have thought... but if it was too low across the board surly all cylinders would be faulty
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either a faulty compression tester or you've slipped a couple of teeth on the belt and twanged the valves, with cyl 3 being the most affected. 95 psi is what i see with cracked exhaust valves generally, tends to be enough to cause a misfire. all guess work though really without having the car infront of me.. still would be worth at this point checking that the timing marks all line up.
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I have already checked this. and all seems to line up..
I agree with the comp test i thought at first this was low. but ive had a few people saying that its within 10% of each other and the pistons i have maybe why the compression low.
to be honest im just about to quit with it ive only driven it twice and im thinking about breaking it up..... a quick way to loose 5k
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i found this today after removing the tape from the coil wiring. as soon as the tape came undone it just popped out.. have replacement on its way
(http://i1286.photobucket.com/albums/a619/bruders8146/20141110_091806_zps249a139c.jpg)