so I cleaned my throttle body......

[Stekelly]

So I decided today would be the day id clean the throttle body so I disconnected everything. Battery first then air intake stuff ,both pipes from intercooler , top pipe to turbo. Then undid the 4 bolts and took off the throttle body. One of the plastic bits on the electric plug to clip it in place snapped off because it was brittle but seems to be secure nonetheless.

Got it on the coffee table and cleaned it out with loads of carb cleaner. I undid the two little screws and took out the plate in the butterfly valve and gave the whole thing a proper scrub.

At some point someone had taken off the small middle cable on the starter and extended it with a spade connection and a bit of cable so I took that off and put the original connection back on.

All back together and it started on the button . It had been taking a bit of cranking and I was getting the jumping revs issue just after starting every so often.

So now im sitting it it at idle and the on starting the revs idle at 1000. But the more I sit here and the temp gauge hits the middle where it sits the revs are closer to 1100. If I stick on the aircon it drops to where it normally would have idled at around 750. If I put it in r or d the revs drop to that to. Into p or knock off the aircon and its back to 1100.

Any ideas?

Presumably the electrical connector on the etm can only be put on one way and I couldnt have it backwards?

I would pick the first day I chooses to rain in ages too so I did rush a bit but as far I I can see everything is back as it should be.

[mikealder]

Did you replace the gasket between the ETM and inlet manifold - Mike

[Stekelly]

Sorry. Knew I forgot to put something in. Yeah new gaskrt was fitted.

[ShadeTek]

Give the car a few drive cycles and see if it learns the correct idle speed.

[Aveton Gifford]

Check you have re connected the small vacuum pipe that goes onto the brass connector on the inlet manifold on the right hand side (as you look at the engine)

[stuartggray]

Isn't there some technique like switching on the ignition and pushing the throttle pedal down to max three times in a row to reset it? (with engine off)

[bluetownbarry]

Originally Posted by stuartggray

Isn't there some technique like switching on the ignition and pushing the throttle pedal down to max three times in a row to reset it? (with engine off)

I think that refers to a throttle body realignment - I don't know if this applies to Volvos, but I recently done a realignment on an Audi A6 Avant - on that, there was lots of internet forum myths telling you that a realignment would take place by holding down the pedal 3 times - turned out the only way to do it was with Vagcom (Audi equiv to VIDA/DICE).

Like I say, I don't know if this applies to Volvos - it may well be like someone else says you just need to go through several cycles before the car learns the correct position. Hopefully, someone more knowledgeable will be along soon.

[Stekelly]

So its going from bad to worse. Went to give it a drive up the road . I needed petrol anyway. I got a couple of hundred yards and realised it was like id no turbo. 2k revs and then no power. Reved up to 3k and no more power. Was about to turn and come back when I got a reduced power notice on the dash and then an engine service required one. No power at all car crawling at 1500rpm. Got it back and when I start it the revs fluctuate from 7 to 11 hundred revs ish for a bit with the car struggling then it flys up to 2k and idles . Im going to reset the errors now.

All seems to be in place pipe wise.hopefully im missing something obvious.

[Stekelly]

Using my generic code reader I have 3 showing. P0067$11 map/maf throttlw position correlation
P0123 $11 throttle/pedal position sensor switch a circuit high
And
P0221 $11 throttle /pedal position sensor/switch b circuit range / performance.

I wonder could the etm be stuck ? I was able to move it by hand though before I refitted it.

Ive noticed when I knock off the ignition I get like a woomph noise a split second after the engine is shutting down that I dont remember having before.

I erased the codes and im back to rough idling and when I mpve from d back to p the revs climb to idle at 1500.

[sneakypenguin]

could it be you knocked something when putting it back together or a vacuum pipe isn't quite seated correctly? I would take it all apart again then double and triple check when reassembling.

mick