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Model specific boards => Golf mk4 => Topic started by: Big Tone on 24 August 2010, 13:19

Title: Rattle on start up. SAP running
Post by: Big Tone on 24 August 2010, 13:19

Hi, I am experiencing a rattly start up. This only happens when first starting in a morning, when the secondary air pump is running.
I have recently replaced plugs, coil packs, vac and boost hoses and car is running good, apart from this rattly sound.

I have also replaced the rivets on the sap.

Anyone have this before?

Title: Re: Rattle on start up. SAP running
Post by: Mr_Orange on 24 August 2010, 17:55

Thin oil and dry tappets (before the oil gets pumped around)?

Title: Re: Rattle on start up. SAP running
Post by: Big Tone on 25 August 2010, 06:55

Possibility I suppose as oil is 5w30, but it is only when the sap is running, coincidence?

Title: Re: Rattle on start up. SAP running
Post by: Mr_Orange on 25 August 2010, 17:12

Is it possible to disconnect the SAI pump and fire it up, see if the noise persists?  Most you might get is a code that you'll have to delete afters.

Title: Re: Rattle on start up. SAP running
Post by: Big Tone on 25 August 2010, 20:25

Will try that, I will let ya know, at least I will know where it is coming from. Ta