Rough idle after battery disconnected?

[shayne86]

Had the battery discontented for a few hours the other day. Now the car has a very rough idle. Is this normal?

Car starts fine and runs fine for about the first 15-20 seconds then sounds like its got a lumpy cam. Responds ok-ish when driving but feels a little hesitant.
Nothing like it was yesterday before i had the battery disconnected.
Is a v8 for reference. 2004 model.

Anyone come across this before?

[shayne86]

Tried to run it with the MAF plug disconnected and it idles fine!

Surely it can't be a bad maf sensor, this one is only 4 months old?

[shayne86]

For reference i disconnected the battery only. Nothing else was touched under the bonnet so couldn't have damaged anything or knocked anything like the MAF. Weird

[V8Ian]

Is the MAF genuine or aftermarket?

[shayne86]

Is the MAF genuine or aftermarket?Not too sure to be honest mate. Its a Bosch unit from a reputable supplier here in Perth. Not an ebay item.

[V8Ian]

Bosch should be OK.

[shayne86]

Bosch should be OK.That's what i thought. Hence why I'm so confused

[shayne86]

So ive cleared a code through my obd2 reader and seems to be back to normal. Will see how it goes in the morning

[Bohica]

What was the code?

[shayne86]

What was the code?Can't remember. Something about voltage to maf low.