If I let off the accelerator the engine dies again. Has anyone experianced similar?Got the openair. Throttle body knackered?
Got the openair. Throttle body knackered?
I've drove round in it for about 10 miles, everything ok apart from the high idling, until I was parking it on the drive then the engine cut out. Now it won't start unless I press the accelerator. If I let off the accelerator the engine dies again. Has anyone experianced similar?
If I let off the accelerator the engine dies again. Has anyone experianced similar?If you remove the air filter box, you can see into the TB. If there's enough carbon deposits it effects how the butterfly closes and causes eratic idling and stalling.
Buy some carb cleaner (it's in a aerosol can) and when you've go the air box off give the tb a good clean inside. Don't spray loads of the cleaner into the tb, spray it on to a rag, hold the butterfly open and wipe around the inside. If it's really gunged, use a toothbrush to loosen it and then wipe off with a rag.
The car might then idle around 2000rpm and you'll need to reset the ECU. You can sometimes do this by disconnecting the battery overnight. If that doesn't work then phone a local auto electrician and ask if they can reset the ECU.
If cleaning the tb doesn't do the trick it's time to start looking at the temp sensor etc.
Buy some carb cleaner (it's in a aerosol can) and when you've go the air box off give the tb a good clean inside. Don't spray loads of the cleaner into the tb, spray it on to a rag, hold the butterfly open and wipe around the inside. If it's really gunged, use a toothbrush to loosen it and then wipe off with a rag.
The car might then idle around 2000rpm and you'll need to reset the ECU. You can sometimes do this by disconnecting the battery overnight. If that doesn't work then phone a local auto electrician and ask if they can reset the ECU.
If cleaning the tb doesn't do the trick it's time to start looking at the temp sensor etc.
should the tb be removed from the engine before cleaning?wadders wrote:If you remove the air filter box, you can see into the TB. If there's enough carbon deposits it effects how the butterfly closes and causes eratic idling and stalling.
Buy some carb cleaner (it's in a aerosol can) and when you've go the air box off give the tb a good clean inside. Don't spray loads of the cleaner into the tb, spray it on to a rag, hold the butterfly open and wipe around the inside. If it's really gunged, use a toothbrush to loosen it and then wipe off with a rag.
The car might then idle around 2000rpm and you'll need to reset the ECU. You can sometimes do this by disconnecting the battery overnight. If that doesn't work then phone a local auto electrician and ask if they can reset the ECU.
If cleaning the tb doesn't do the trick it's time to start looking at the temp sensor etc.
Having the same problem with my polo. Idle speed picked up mega buy its still idleing up and down alot. its was between 1500 and 2500 yesterday, that was after i cleaned the TB out. before i did that it would idle very low and cut out. If i leave my battery off at work while at work, this problem may clear? If now how do i go about having my ECU reset?
Many thanks.
Many thanks.
Sometimes you can leave the battery disconnected overnight and that will reset the ECU. That never works with mine, so I use one of those mobile auto electric guys, who have a VAG COM or something similar. It's good because they check the fault codes and put the ECU back into 'learn' mode. Then all you need to do is drive around for 30 minutes, while the ECU reads all the sensor information again.
An update on the openair.
I've had the TB off, gave it a good cleaning. After cleaning it, it started first time and idled just below 1k rpm until I pressed the acclerator it then shot up to 2k rpm.
If I let the engine tick over for a minut on its own, then *very* gently press the acclerator, get the revs up to 2k then back down again, this method stop the buttefly 'sticking'.
If the butterfly is 'sticking' after cleaning the TB, does this mean I need a new TB?
I've also fitted a new temperature sensor and changed the coolant, but this hasn't really helped.
Here's a pic of the car.
I've had the TB off, gave it a good cleaning. After cleaning it, it started first time and idled just below 1k rpm until I pressed the acclerator it then shot up to 2k rpm.
If I let the engine tick over for a minut on its own, then *very* gently press the acclerator, get the revs up to 2k then back down again, this method stop the buttefly 'sticking'. If the butterfly is 'sticking' after cleaning the TB, does this mean I need a new TB?
I've also fitted a new temperature sensor and changed the coolant, but this hasn't really helped.
Here's a pic of the car.
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The_phat_controlleruk
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- Location: Gidea Park, Essex
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No, it's not sticking, from past experience that is normal behaviour after having it cleaned. I clean mine regularly and it always does this, press the accelerator and she shoots up to 2500 rpm, leave her alone and she will EVENTUALLY go back to 1100 rpm (although that is still high). What you need is someone with VAG-COM to re-align the TB, you can try the old battery method but not sure that will work as your TB is out, this is where VAG-COM will sort it out. Shouldn't be charged more than £20-£25 to get it sorted, unless you now someone with it. Shame you don't live near Essex as I have it on my laptop, only takes a couple of minutes.
What time scale are we talking, minutes, days, weeks?The_phat_controlleruk wrote:No, it's not sticking, from past experience that is normal behaviour after having it cleaned. I clean mine regularly and it always does this, press the accelerator and she shoots up to 2500 rpm, leave her alone and she will EVENTUALLY go back to 1100 rpm (although that is still high). What you need is someone with VAG-COM to re-align the TB, you can try the old battery method but not sure that will work as your TB is out, this is where VAG-COM will sort it out. Shouldn't be charged more than £20-£25 to get it sorted, unless you now someone with it. Shame you don't live near Essex as I have it on my laptop, only takes a couple of minutes.