[V8] Pulled codes, no joy - but it RUNS!!!!

[dsaad at icehouse.net]

Either these Bosch +4 plugs are total junk or the V8 just does not like them.
They foul out way to easy. I had the exact same problem with a brand new set.
Went back to OEM and have not had any starting issues at all. I can even move
the car in the driveway without fear when the motor is cold.

Dave

Quoting Mike Arman <armanmik at earthlink.net>:

>
>
>
> Back to basics - spark, fuel, compression.
>
> Smell fuel.
>
> Pull a plug, it is one of those fancy Bosch 4 electrode plugs, even says
> Audi on it.
>
> Place on engine, peer through gap between hood and cowl, crank - ZAP! ZAP!
> ZAP!
>
> Got spark, and the timing belt *must* be OK. Besides codes were 4 4 4 4 ,
> or all OK.
>
> Plug looks a little grotty, pull another, its worse.
>
> Go buy eight new spark plugs, install (race with the rain), cross fingers,
> crank engine . . .
>
>
> ROARRRRR!!!!!
>
> Yeeehaaaa!
>
>
> Conclusion - old plugs were marginal, when the battery finally died, there
> was not enough to spark and clear off the deposits, so they fouled. New
> battery couldn't clear *thoroughly* fouled plugs. Plugs replaced, and away
> we go . . .
>
>
>
> Best Regards,
>
> Mike Arman