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500kalle...Welcome to the forums!  Here is a discussion about the ISA, there are many others.  See the July 30, 2016 exchange, I included useful PDF guidelines:  

For more discussion, go to the Search box, change the setting to "All Content", and type in "idle ISA".  You'll get a number of topics and replies related to your 2.5L TBI engine, troubleshooting, fuel pressure and diagnostics.

Moses

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Thanks, great input !!

but I fear there's an other issue with my isa, the wiring seems to be damaged and so I need a wiring Diagramm to rewire it !!

got a link to a matching Diagramm?

throttle relay is ok, so I need to know the way wiring goes from the relay to the isa!!!

is it right that throttle relay and fuel pump Relais are similar?

please help!!

thanks again!!!!

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