Audi A4 starts some times and then won't
I got a new altinator a couple of months ago the
car has been sitting for 2 months it's an Audi a4 98
i went to start to recently and it wouldn't start so I
charged the battery and tried starting it and it
started then I drive it for an hour or so turned it off
for 2 min tried starting it again and it wouldn't I got
it back home and tried starting it again started
went back out a day or so later to start it and it
wouldn't start but the lights on the dash all worked
and I've tried to start it the last couple of days in a
row and it started is there something wrong with it
Could be your starter solenoid starting to go or a bad relay. Test all fuses and relays. Test relays for control and resistance. If these are good do the spark and fuel test to narrow your diagnosis. You have an intermittent issue so one time you might get a passing test the next not. Keep track of conditions when it starts and does not. Weather, overnight, hot engine, cold engine....
when you say " doesn't start " state weather it turns over or not or if it clicks ,, make sure the batt. terminals are clean and tight , don't let a vehicle sit for more than a week without warming it up if you can avoid it
A brief and quick question here is when you try to start the car is it in direct sunlight on the hood and on a hot day? and is this a 1.8L engine or a 2.8L engine ? if you can get he car started by puting your foot on the floor and cranking it during the times i pointed out then it is likely a dirty throtle body heat sensor which is located in the neck of the tube that connects to the throtle body. either cleaning or replacing this sensor will fix it.
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