Bosch AS3 VP20 Injection pump

Lionel · Unread post by **Lionel** » 14 Mar 2005, 23:09

Can anyone help, Can you tell me how to adjust the compensation and max fuelling on this pump. Are there any simple ways to lower smoke emissions for the MOT test.

Dave Burns · Unread post by **Dave Burns** » 15 Mar 2005, 02:11

Did you give it a good thrashing through the gears before going for the test, otherwise known as the Italian decoke.
What year is it.
Dave

Lionel · Unread post by **Lionel** » 15 Mar 2005, 23:06

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Dave Burns

Did you give it a good thrashing through the gears before going for the test, otherwise known as the Italian decoke.
What year is it.
Dave
<hr height="1" noshade id="quote"></blockquote id="quote">

Lionel · Unread post by **Lionel** » 15 Mar 2005, 23:08

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Dave Burns

Did you give it a good thrashing through the gears before going for the test, otherwise known as the Italian decoke.
What year is it.
Dave
<hr height="1" noshade id="quote"></blockquote id="quote">
Its a 1998 Facelift model eng code DHX (Semi electronic system)
No the test is due this monday so thrashing on the motorway is called for.

jeremy · Unread post by **jeremy** » 16 Mar 2005, 02:02

Have you actually got a problem or are you concerned you may have?
The MOT test is set out here: http://www.motuk.co.uk/manual_740.htm
Injection cleaner may help nut the 'Italian Tuneup' is recommended by many including the trade.
Jeremy

Kowalski · Unread post by **Kowalski** » 16 Mar 2005, 15:02

You shouldn't need to adjust the pump at all.
Excess smoke can be a sign that you've got a blocked intake (dirty air filter or collapsing hoses), a leaky turbo or valve guides (blue smoke) or worn / carbonned up injectors (black smoke). A new air filter and an italian decoke will most probably get it through its MOT, injector cleaner can help, but getting the engine hot enough to burn the soot thats accumulated in the exhaust will be the biggest benefit.