Audi Repair Questions? Ask a Mechanic for Answers ASAP
Hello, I'm Jason. I will do my best to answer your question quickly and accurately using the information you have provided.
Ok, first, most important question back to you. When it's in the state of not starting, does the engine actually turn over, or does nothing happen at all?
yes it turns over absolutely and the battery has plenty of power . I just bought this wagan for my pregnant wife about 3 weeks ago so this is new to us
Ok, now I need to ask about the basics, and I'll get onto the EPC issue in a bit...
So right now, every time your mechanic has checked it, it starts fine?
And I need to know if your mechanic is Audi or Euro-specific
or more of a general shop
yes however he has not test driven it
he is very keen with foreign cars in general especially german and japanese
ok, so the test drive is pretty important, since the problem happened after you drove it. We need to be able to narrow down whether this is a fuel or spark issue
If fuel pressure is lacking, I'd suspect a pump that is starting to fail....
foreign his customers drive up to 3 hours away because he is honest but i think he might be over his head on this one
I've got folks who cross borders, so understood
I'm assuming that he's using the VAG-COM/VCDS scan tool
now, I'm questioning his dismissal of the EPC code
since EPC is throttle control
that's just it it has two internal diagnostic tools within itself the fuel pressure reads fine as well as the electrical
It was last owned by an audi tech who changed the oil every 3 000 etc. who claims this is something he never had a problem with
Though I have been lied to before
This one is pretty tough to try to diagnose remotely...especially without a list of fault codes
I'd start suspecting a crankshaft position sensor, which doesn't often leave codes behind
but that's somewhat rare with this engine
say there were no fault codes but the epc what then?
well, if there is an EPC fault, that's a fault code
hence my confusion
one moment....away from the keyboard
he say's that he has been using castrol edge w/spt,5W40 is this the correct oil for this car because if it is not synthetic could it could lead to clogging, etc.
if this is so what type of synt
thetic oil should i be using
Oil won't be the problem here
I always use Motul VW/Audi specific oil in these
for what it's worth
but that won't affect starting
Really, the EPC codes are important, and catching the starting problem when it's happening, to determine if there is a lack of fuel or lack of spark is key
If lack of fuel, time to check the fuel pump relay, but if that fails, it will usually leave codes behind.
If lack of spark, I'd really suspect a bad crankshaft position sensor
in either worst case scenario what would be the answer?
fuel pump relay, fuel pump or crank sensor are my first three thoughts
but again, this is without knowledge of the stored EPC codes
While I'd like to offer a magic bullet answer, obviously some of these issues require some pretty in-depth diagnostic strategies
But hopefully the session here has armed you with some information at least
when i get the codes and find out more monday how can i get ahold of you for more answers?
Even after rating the session, you will get a link in your email to respond to me if needed
I will also give you the link to my direct page here
could it be a problem with the gas tank vacume sensor or something of the like?
gas tank vacuum sensor?
no sort of EVAP emissions problems will cause the car to not start
and if there was an EVAP problem, there would be a fault code indicating such
yes or some gas tank sensor could it maybe be a corroded wire on the starter? or would it show up on the electric diagnostics?
Again, there is no gas tank sensor. Also if there was a corroded starter wire, the engine would not spin over
The 3 things I mentioned are the important ones.
You will still be able to reply, but I do need to sign off for the night.
I'm switching this over to email format now, so we can keep in touch if needed