Continuing diagnosis...

[mft]

Right, I've cleaned the ICV, removed, cleaned, and reset the (filthy) TPV (which passes the multimeter test), changed the plugs, and run a bottle of injector cleaner through.

Basic cold starting is still a lot better, but I'm still getting the following symptoms:

• Poor cold starting if it's been raining
• Really rough idle once started while cold (much smoother once warm)
• Exhaust often smells of petrol during cold idle
• Exhaust sometimes smells of petrol even during warm idle, after a drive
• Very unhappy to cruise along in gear at lowish revs without throttle - when most cars would just gently engine brake, it starts to kangaroo
• When I press the thottle from idle, it struggles momentarily, before picking up the revs
• Generally quite poor low-down torque, and unhappy low down - needs a lot more revs than I'd expect to move off
• Poorer MPG than I'd like - ~24mpg mixed, ~27-8 on longer steady journeys

I know that the ECU is designed to richen the mix when cold, but I wonder if it's doing it too much? Might an over-rich mix low down all the time might explain a lot of this? (BTW, the mix higher up is OK, as I've tested it on a motorway run with a wide-band lambda kit.)

I'll try and take it for a slower drive with the wide-band attached this weekend, and see what this shows lower down. In the meantime... any ideas?

Thanks

[m-dtech]

hmmmz

blue temp sensor??

check the rotor and cap, possible worn / bad contacts. (at least remove and take some emerypaper over the contacts.)

[tee]

Air Leak??

[E30Mark]

Check the injector wiring under the inlet manifold, this could be so many things. Good luck!

[DaveD]

how are the plugs...

[gavo]

I've been having a few of the same problems with mine.

missfires when first started but fine when warm.
exhuast smells very strongly of petrol at all times.
and i get the kangaroo problem aswell.

my mpg is about 15 round town but will do about 35-40 on a motorway run.

I was told it could be a maf problem.

[mft]

Thanks for the suggestions guys

• Blue temp sensor: I've not checked it. Can it be checked, or is it just something to replace? Will search...
• Rotor and cap: on the to-do (and to-search!) list.
• Air leak: I've not seen an obvious air leak, and have had the MAF-TB trunk off a couple of times. I'll have a closer look everywhere else. Gaskets are on the to-do list...
• Injector wiring: what am I looking for? Just obvious damage, or do I need to get busy with a multimeter?
• Plugs: I've not checked the new set yet, as I wanted to give them a couple of tanks before looking. Will do, and report back.
• MAF: not cleaned yet. Will do.

Looks like a busy Sunday...