GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: fishfingerface on 14 May 2012, 13:09
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Hi All
i'm a newbie and need some advice on my 1999 AGU Golf 1.8T
The car seems to mis-fire badly when it gets hot....
Its had a code reader plug into it and nothing shows...i have changed he Igntion control Unit by the Air box...thinking that was it
am i right in saying it could now be the Coil packs....it seems odd that nothing shows on a fault code reader...
the car seem to splutter then cut out...this could happen on a junction and with my baby girl onboard this is not good
any help or advice would be great
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AGU ENGINE CODE
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Ignition amplifier on your air box is usually the culprit, unlike ye coils to go on a agu
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Try changing plugs :wink:
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I have changed the ingnition amplifier back last week..but this didn't sort out the misfire when hot
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Have you had it scanned yet?
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No codes could mean the MAF sensor :smiley:
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Pointless doing a scan on an AGU as nothing ever shows up. Better to do it the old fashioned way. :nerd:.
Doing it when hot, I would say fuelling rather than spark.
1. Whip the plugs out and see what they look like.
2. Clean the throttle body, if it hunts for idle even remotely.
3. Use some injector cleaner, and give it a run.
4. Unplug the MAF and try to replicate the problem. It may run worse, but if it stops the cutting out it's a fault with the ECU diddling with fuel trims, not necessarily a duff MAF.
5. Check for air leaks.
If you know someone with a copy of VAGCOM do a log of the air flow values.
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my car used to misfire and cut out an awful lot. a new maf sorted it!
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People needlessly changing MAFs at £80 a throw (or whatever it is) has to be one of the biggest earners for Bosch.
It's money for old rope; recon it by giving it a little wipe down.
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People needlessly changing MAFs at £80 a throw (or whatever it is) has to be one of the biggest earners for Bosch.
It's money for old rope; recon it by giving it a little wipe down.
From experience of people cleaning it only delays the inevitable :wink:
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From experience of people cleaning it only delays the inevitable :wink:
But for the amount of people that have changed it when it's something else screwing up the fuelling.
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From experience of people cleaning it only delays the inevitable :wink:
But for the amount of people that have changed it when it's something else screwing up the fuelling.
Ah I see what you mean indeed I agree check the basics first :smiley:
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so first port of call is.................
Clean the Maf Sensor
Possible plug change
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so first port of call is.................
Clean the Maf Sensor
Possible plug change
Check the plugs.
It'll tell you a huge amount about whats going on in the cylinder. It'll give you a good indication why you are getting poor combustion.
Clean the throttle body.
It'll stop any hunting for idle, and is free.
Check for vac leaks, specfically on the PCV system hoses to the inlet manifold and the breather pipe.
Unplugging the MAF makes the engine fuel on a default map, as it doesn't know how much air it's getting.
If you don't start to misfire when you get up to temperature you know it's something that messing up the fuelling.
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Thank you Chris
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I've got this problem with my agu. The past four weeks the only code that came up was temp sensor. After changing that still the same just come bak from we're I had it remapped and I know now the culprit is tha lamba sensor it only showed up wen the remap man did a live scan and the sensor reading was all over the place. So new lamba tomorrow and then bak to sort remap out
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Hmmm Interesting :wink:
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Ok still got the same problem. Even changed lamba sensor. Any ideas before I scrap it
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Agreed with Chris on the maf sensor. Loads of people shell out for the miracle maf sensor cure and its a waste of money. My guess is the camshaft sensor. :tongue:
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This is a pig of a Fault
do really want to start changing loads of stuff and it still dosen't fix it...there has to be someone who has had this and sorted
we just need a quick answer.....
inggti...i'm the same as you..........had a right scare the other day...slowing down to turn left onto a side road with cars right behind me the F**king car decides to stall
two cars nearly plough into the back of me
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What have you done/ changed so far?
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As above what have you done so far?
Was the temp sender a Genuine part? Are the plugs new / OK?
It could be a coil pack AGU coils don't usually go but they can
Have you cleaned the throttle body as suggested?
With a faulty Crank sensor you usually cant start the car when it is warm.
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Sort to jump in. I've changed ignition amp coil packs temp sensor. And still the same oh yes and lamba sensor. Yesterday had it pluged into snap on machine and it came up throttle position sensor. And it's getting harder and harder to start over the last few days. Thinking about new crank and cam sensor next. After that who knows. Anubody