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Chris..
Lets just assume (?) you dont have a faulty high ECU resistance ground caused by corrosion / loose connections or by corroded battery terminals etc.etc. The ECU connection plugs must be cleaned and if its OK try the following. Before you go beating around the bush looking for high resistance connections, try this.
ADD another ground between the chassis and engine. Or from the throttle body to the engine. Any length of spare electrical cable will do, as its temporary.
Connect the temp wire / cable from a CLEAN engine or gearbox mounting bolt to the chassis - again a clean chassis bolt with no paint or corrosion. Just wrap the temporary wires under the bolt heads and snug up. You now have an alternative to the (?) faulty ground connection.
What you are doing is circumnavigating potentially high resistance faulty grounds with a (temp) new ground cables without reverting to testing out the resistance values of the existing old cables.
Let us know if you have success.
__________________
2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
Last edited by Steve Tinker; 09-27-2013 at 02:27 AM.
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