So spent most of the day (38C here today) over the engine bay listening to tunes and drinking beer.
Stripped the intake off, rigged up a hose to my wet and dry vac and vacuumed up sand/ grit, dirt 2 snail shells ??????? (where the hell do they come from) from around the intake before taking it apart.
Cleaned the intake sections with carb cleaner . Got the harness out and assesed. Looked like shit!. stripped it back de-pinned the connector. Soldered in new leads. Coax wire was perfect fit. Soldered the pins and reassembled the connector.
Knock sensor tested at 562K Ohm (well within the range). With the harness it tested at 559K Ohm still in range.
Did the spark plugs at the same time, who ever did the car last should be slapped !!! had Champion Platinums in there with a 14 (NGK4) heat range .... way too hot , guess they whacked in 350 plugs, electrodes were worn to heck too probably 1.4-1.5mm gap. Got some LFR6AIX.
Put it all together and the moment of truth, fired up first go. Went for a test run , Significant improvement on take off, tried stalling it up and lit up the rears ! never happened before.
I think I just thought these cars were good at WOT and sluggish otherwise......... proven wrong now. Very very happy with the improvement.
Thank you all for your help , Esp Scotty for telling me the whole intake needs to come out.
Total cost $123.70 including the plugs (had to buy the coax and I ran out of heatshrink)