[V8] cold no-start

[dsaad at icehouse.net]

After you do all the obvious stuff, you might try a fuel pump relay. Sounds
wierd I know - but it happened to me. In my case, the motor would often "catch"
just as I was releasing the key from the start position. I just cleaned up and
adjusted the contacts in the relay and all has been well since.

I also had a problem with the Bosch +4 plugs too. Not sure if it was the relay
all along but I went back to the OEM plug and now I am running some el-cheapo
champion plugs that seem to work great - and cost about $2 a piece.

And - remember if you think the motor has flooded, keep the gas pedal fully
floored while cranking. This works for any car - carburator or EFI - by allowing
the max amount of air to enter the cylinders and dry out/lean out the cylinder.
On a carb car, flooring holds the choke open, and on EFI the WOT switch tells
the computer to reduce fuel.

Dave

Quoting urq <urq at pacbell.net>:

> 15 minutes???  What is the ambient temp?  Is it getting to be well below
> freezing?
>
> I'm not thinking coolant temp sensor myself, but I suppose it could be.  If
> you have a way to read out the ECU data blocks you can read the temp value
> the ECU sees.
>
> I'm wondering if you're having a problem with fuel pressure.  Have you tried
> warming up the battery and topping up the charge before attempting to start?
> I haven't seen the V8 to be as susceptible to low battery voltage as other
> Audi models, but it could be.  Can you tell if you're getting spark?
>
> Steve B
> San Jose, CA (USA)
>
> ----- Original Message -----
>
> > the v8 is not starting well when it has sit for very long.
> > synptoms started about 2 days ago with start time of 3 minutes..
> > today it took 15 minutes..
> > note the temp dropped alot, even got snow today.
> > I am suspecting the coolant temp sensor. this sound logical?
>
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