GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Swanzea on 15 September 2008, 21:01
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Whats this digi-lag i keep hearing? and do them chips that fix this really work? And how much am i expected to pay?
thx swan
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load of old rubbish. more likely a Digifant not timed correctly. Never had a problem myself.
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Ive just fixed this lag. Its like a turbo lag. Plant your foot to the floor and you get a delay in power.
Its a timing and air/fuel mixture problem. Dont buy those chips. I think they are only good if your ECU has blown and can use those as a repair
check Rubjonnys digifant tuning guide in the maintainance section.
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cheap chips = poo
they mess up your engine and dont really give much power.
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Ive just fixed this lag. Its like a turbo lag. Plant your foot to the floor and you get a delay in power.
Its a timing and air/fuel mixture problem. Dont buy those chips. I think they are only good if your ECU has blown and can use those as a repair
check Rubjonnys digifant tuning guide in the maintainance section.
Must check to see if mine has this problem!
I always thought it meant that literally nothing happened, like you hadn't pressed the throttle, not like a turbo lag kinda thing
cos if I plant the throttle in lowish revs in second, it only really begins to shift a bit higher up the rev range, just like turbo lag :undecided:
I thought it was just getting into the torque band :sad:
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Mine had this Digi-lag sometimes... and it's not a Digi.. :grin:
Still need to get the timing done :lipsrsealed:
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Them chips give BIG flatspots, I tried one out then swapped it back to the old one as it was a lot better.
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Digi lag is not the same as turbo lag. The car doesn't come into the powerband until you hit over 2750rpm anyway.
Digilag is the hesitant-ness you get for a second or so from when you press the throttle to the car actually responding. this can be cured without chips and the like by slightly adjusting the AFM carefully. Esentially you need to remove the cover off the AFM so you see the clockwork internals, clean them up with electrical contact cleaner first (if there are heavy tracks on it you might wish to replace it as this will be part of the problem ) if you carefully undo the little bolt whilst locking the mechanism in place you can then adjust the main cog clockwise by no more than 2-3 clicks. If you adjust it to much or dont have it locked when you undo it, it will unwind completely and it'll be buggered. I'd suggest using a spare one to do this to and then fit it. That way if you've done it wrong or mess it up, you can just refit your original one.
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Rubjonnys FAQ how to set up digi will sort it. Also changing dizzy cap, rotor arm and plugs ect.....
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Digi lag is not the same as turbo lag. The car doesn't come into the powerband until you hit over 2750rpm anyway.
Digilag is the hesitant-ness you get for a second or so from when you press the throttle to the car actually responding. this can be cured without chips and the like by slightly adjusting the AFM carefully. Esentially you need to remove the cover off the AFM so you see the clockwork internals, clean them up with electrical contact cleaner first (if there are heavy tracks on it you might wish to replace it as this will be part of the problem ) if you carefully undo the little bolt whilst locking the mechanism in place you can then adjust the main cog clockwise by no more than 2-3 clicks. If you adjust it to much or dont have it locked when you undo it, it will unwind completely and it'll be buggered. I'd suggest using a spare one to do this to and then fit it. That way if you've done it wrong or mess it up, you can just refit your original one.
I asked about doing the same method on here a while ago.
Doing that to the AFM effectively is fooling the ecu into thinking that there is more air coming into the engine than there actually is, and therefore the ecu increases the fuelling to compensate which is effectively what those ecu chips do- increase fuelling.
Thats why, despite having a spare AFM, I never went ahead with it, in the belief that setting the car up properly would sort the problems :)
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the afm mod is also usefull for older afms that have gone out of spec a bit, or have worn contacts on the pcb. its a bit of a black art though more often than not you cause more problems than you fix! Always leave this till you have tried everything else :)
also worth noting the afm off a MK3 2.0 8v will also fit a MK2, has the same bosch part number :)
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the afm mod is also usefull for older afms that have gone out of spec a bit, or have worn contacts on the pcb. its a bit of a black art though more often than not you cause more problems than you fix! Always leave this till you have tried everything else :)
also worth noting the afm off a MK3 2.0 8v will also fit a MK2, has the same bosch part number :)
Would a mk3 afm offer any advantage over a later mk2 afm? :)
Just realised- when you say same part number, does that just mean its the same part?
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Follow the infamous rubjonnys digi timing guide! It worked well for my car.
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mk3 part is the same so no advantage, I managed to pick up a newun off ebay for £50 :cool:
the VAG part number differs for some reason, but I compared the bosch number on both the new one and the one I took off and it was the same. No idea why the VAG numbers differ, perhaps they have a different 'default' setting on the screw or summat.
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just an update on mine.
Was the airflow meter that caused this lag. :angry:
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mine seems fine on set off but in second if i let off then re accelerate there is a slight delay is this digilag