240 Idle control problem?
I noticed something whacky happening a few weeks ago, happened once so I ignored it, but Something Odd happened again this morning, so I thought I'd throw symptoms on the table & see what people think, as I won't be able to look at it before the weekend (might not even be then).
[How do I format stuff like bullet points, newlines without new paragraphs & indents without BB Code?]
(*) redblock managed by MoTeC running Motorcraft (XF) IAC, cam is a little too big for static CR & MAP-sensed operation
(*) the idle was tuned, and this was ~5yrs ago, without IAC and than IAC was switched on - ie. so it will mostly idle itself, and IAC just needs to help occasionally
(*) car has recently been to a mechanic to have all my leaky Hyster/Crown spec oil-filter & cooler hoses replaced with something more relevant to a car
(*) cold start worked fine, but VERY doughy on light throttle to roll it out of the garage (ie. as soon as I tocuhed the throttle it bogged down & felt like it was heading towards stalling)
(*) 30s of cold idle mostly fixed that "bogging down"
(*) when warm, I did need to catch it with the throttle or it wanted to stall
Having typed all that out, it does smell a bit like idle control doesn't it? Although I thought it would need IAC for cold start to idle properly (which it did until I touched the throttle), maybe that's being done totally by fuelling?
I guess my first step is to check the plug & see if the ECU can detect whether a valve is connected ... ? Any other suggestions before I start trying to diagnose?