DI Pressure problems Syvecs S7+ PNP AUDI TTRS

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AMP Mari

Marian Marth

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Austria

Hello

i am working on a AUDI TTRS 8J CEPA Engine with the SYVECS S7+ PNP kit.

There are some strange problems with the Direct Injection Pressure in relation to the supply Fuel Pressure.

Sometimes the Direct Injection Pressure rises to 150 bar(max) with almost no change in supply Fuel Pressure.

Then the Direct Injection Pressure Valve duty drops to 0% but the Pressure stays 150 bar.

The Direct Injection Pressure is very sensitive to supply Fuel Pressure.

A change of 0,3 - 0,5 bar could cause that problem.

On the flip side the Direct Injection Pressure sometimes drop to 0 bar @ minor supply Fuel Pressure change 0,2 bar (2% Duty change).

The problems are not always repeatable so it is not possible to do the mapping work.

I have replaced the Upgrade DI Pump (other Brand) but the problem is still present.

Please take a look @ the attached Data Logs + Screenshots.

Have anyone experience with that kind of problem?

Thank you

Attached Files