by "HLS" <nospam@[EMAIL PROTECTED]
>
May 14, 2008 at 08:07 AM
"Mike" <mik@[EMAIL PROTECTED]
> wrote in message news:0_qWj.21>
> Check the EGR system for blockages/restrictions and proper operation of
> all components.
Another tip.. Some carburetor/injector cleaners are based on amine
compounds.
These combust to give oxides of nitrogen. If you are going to use them,
do
it
well before the test and go with untreated gas. No need to make the test
even
harder to pass.