Getting frustrated now (idle speed)

[GG33]

Got the laptop working and linked to the ECU, read the posts several times and went for the set up. discoverd pot1 was a bit spikey so replaced it. Got the pots set to 14.8 stinking hotwhich brought the adaptive figures in line and looking good. Throttles appear closed but running fine. Went for a test and its running great, smooth pick up and pops and bangs nicely but i just cannot get the idle speed below about 1050 to 1100..... If I block both air intakes completely - it makes no difference.still keeps running at 1100... What am I missing? I assume it can only be an air leak downstream of the butterflys or worn throttle bodies. So how do I diagnose each of these? The bodies look good and I can't detect any sideways movement when closed, so whats the test for worn bodies?
What is the likelyhood of a downstream air leak

Cheers

GG

[GG33]

jammy_basturd said:

On the passenger airbox, right at the back (near the Y-piece that goes to the water manifolds) there should be a MAP take off hose that goes to the ECU, double check that it is still connected.

Excellent advice. It was unhooked. Now running a little slower. What does the pipe do and should I re-run the set up now the pipe is connected?

[GG33]

Tanguero said:

An air leak will only affect the idle if it is on the engine side of the throttles. A leak into the airbox will not (they already have quite a large leak in through the air filter).

I realised this would be the case after I sat and thought about it for a few minutes. But it did seem to make a detectable difference so I guess the barometric sensor has some input on the MAP. I will reset it all tonight. Austec also suggested they could change the idle timing through the map (currently at 18 deg Advance) which is probably the next thing to try.

GG

[GG33]

It's a 4.5
The timing was Austec's idea, but I might try a synchrometer first. (Now just to find one)