2009 XC70 3.2 no start/rough idle/no acceleration

Peevarino · Post by **Peevarino** » 30 Aug 2016, 19:21

New member, long time listener...

Having some no start/rough running/no acceleration issues with a 09 xc70 3.2. After a quick trip, it wouldn't start (this was after my 20 minute commute home, so car was hot). Finally got it to start, but with a really rough idle, wouldn't go past 15mph, thankfully I was only 4 blocks from my house. Let it sit a while, still ran rough, but would start. Had a pulsing idle, and a hiss noise after every pulse. I'm at a loss. If anyone can help, that would be amazing.

ETA: unplugged injectors and coils, no change, other than sounding worse.

Peevarino · Post by **Peevarino** » 31 Aug 2016, 17:51

For anyone with a similar problem: swapped in a new battery, as I was sure it was nearly time for a new one anyway. Started like a champ, revs great, and is idling great. We'll see if it's the cure all I hope it is.

Post by **kcodyjr** » 27 Sep 2016, 13:46

It's worth taking a voltmeter to a car at the beginning of nearly any diagnostic adventure.

Low voltage really plays hell with every part of the electronics.