Mike Monti
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- Nov 13, 2014
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Hi team
Ive had a good trawl through this and related forums for help but haven't found my issue discussed so forgive me if its a common problem, I have tried to find the answer.
I have had one problem in my a3 for about a year and another more serious problem developing more recently with my 2001 A3 8L 1.8L APG engine Im hoping someone has already solved and could share???
a few months ago I popped up to the store about 5 minutes up the road.
Got back in the car and it cranked over fine but wouldnt fire, about 15 minutes later it started and was fine.
This happened about 3 times over a period of a few months, generally after only short trips.
Recently its started cutting out while driving, generally at low speed approaching lights when changing into neutral. Then wont start. for 20 minutes or so then runs fine again. Last time this happened twice in a trip home from work, 20km, it was a particularly warm day.
I can replicate the problem in the garage by starting it and waiting for engine to get hot then it cuts out and wont start.
Coolant level is fine, is circulating and heating up as normal.
Ive been investigating and it appears what is happening is when the car reaches 90 degrees and the fan should kick in the car dies.
I can stop it from happening by keeping the fan running by keeping the air con on. Though now the weather is getting hotter, 32 degrees Celcius today, if I get stopped at lights for to long I wind up stuck, had to push car through a right hand turn today after cut out in front of a big rig. Thanks to a solid bloke who came to my rescue.
I have been monitoring the 49C level on the climate control and the cut out happens when the water temp is in the 80s and it wont start again until this temp drops below 70. I found by removing the "clutch fuse 17" fuse the fan comes on low speed and will stay on even when the engine is not running.
I have disconnected the coolant sensor and shorted the terminals to make the fans go slow and fast, which works fine.
I have checked the fuses above the battery, all fine, no corrosion and removed all the fuses by the drivers door and checked them one at a time.
Interestingly removing the clutch fuse 17 the fan kicks in then stays on even when the car is turned off. I thought this was interesting as if the fuse failed the fan would stay on until the battery went flat??
Anyway, Ive pulled all the relays out from behind the steering wheel and checked the contacts, which all appear fine.
I tried to check resistance across the crank position sensor but couldn't get a reading.
I really am at a loss to exactly what the problem is, any help would be appreciated
Second issue less of a major but car from time to time loses power while driving like its lost 3 cylinders, runs rough, like it still drives but its not very happy, usually dropping down a gear and running at higher revs keeps it from stalling, then it goes away.
Have replaced fuel filter, coil pack but no real change, about to replace HT leads and sparks but not sure this will address.
She had an oil leak from the rocker cover gasket so spark plug recess was filled with oil, gasket has been addressed.
As a side the oil sensor yellow light has also started coming on, at about 60 degrees I took the pan off and gave it a good clean out, nothing of note in the mesh, oil is fresh and level is fine, seems as soon as car warms up, sensor alert comes on, after a few minutes it goes off and comes back on a but later. low pressure alarm never goes off so not sure if its a sensor problem or a real problem.
Any ideas appreciated
Thanks
Mike
Ive had a good trawl through this and related forums for help but haven't found my issue discussed so forgive me if its a common problem, I have tried to find the answer.
I have had one problem in my a3 for about a year and another more serious problem developing more recently with my 2001 A3 8L 1.8L APG engine Im hoping someone has already solved and could share???
a few months ago I popped up to the store about 5 minutes up the road.
Got back in the car and it cranked over fine but wouldnt fire, about 15 minutes later it started and was fine.
This happened about 3 times over a period of a few months, generally after only short trips.
Recently its started cutting out while driving, generally at low speed approaching lights when changing into neutral. Then wont start. for 20 minutes or so then runs fine again. Last time this happened twice in a trip home from work, 20km, it was a particularly warm day.
I can replicate the problem in the garage by starting it and waiting for engine to get hot then it cuts out and wont start.
Coolant level is fine, is circulating and heating up as normal.
Ive been investigating and it appears what is happening is when the car reaches 90 degrees and the fan should kick in the car dies.
I can stop it from happening by keeping the fan running by keeping the air con on. Though now the weather is getting hotter, 32 degrees Celcius today, if I get stopped at lights for to long I wind up stuck, had to push car through a right hand turn today after cut out in front of a big rig. Thanks to a solid bloke who came to my rescue.
I have been monitoring the 49C level on the climate control and the cut out happens when the water temp is in the 80s and it wont start again until this temp drops below 70. I found by removing the "clutch fuse 17" fuse the fan comes on low speed and will stay on even when the engine is not running.
I have disconnected the coolant sensor and shorted the terminals to make the fans go slow and fast, which works fine.
I have checked the fuses above the battery, all fine, no corrosion and removed all the fuses by the drivers door and checked them one at a time.
Interestingly removing the clutch fuse 17 the fan kicks in then stays on even when the car is turned off. I thought this was interesting as if the fuse failed the fan would stay on until the battery went flat??
Anyway, Ive pulled all the relays out from behind the steering wheel and checked the contacts, which all appear fine.
I tried to check resistance across the crank position sensor but couldn't get a reading.
I really am at a loss to exactly what the problem is, any help would be appreciated
Second issue less of a major but car from time to time loses power while driving like its lost 3 cylinders, runs rough, like it still drives but its not very happy, usually dropping down a gear and running at higher revs keeps it from stalling, then it goes away.
Have replaced fuel filter, coil pack but no real change, about to replace HT leads and sparks but not sure this will address.
She had an oil leak from the rocker cover gasket so spark plug recess was filled with oil, gasket has been addressed.
As a side the oil sensor yellow light has also started coming on, at about 60 degrees I took the pan off and gave it a good clean out, nothing of note in the mesh, oil is fresh and level is fine, seems as soon as car warms up, sensor alert comes on, after a few minutes it goes off and comes back on a but later. low pressure alarm never goes off so not sure if its a sensor problem or a real problem.
Any ideas appreciated
Thanks
Mike
