Erratic tickover, a new prob for me to solve !!!

[rossibran]

Hello all, thanks to all you ace peeps who keep helping me out with me s60. I have just sorted me brake servo out and now I have found that the slight problem tickover has got worse. When the servo leaked it was very slight, now the servo has been changed it is really bad. It doesn't cut out but the tickover is really erratic and drops to 500 rpm and rises upto 1400 rpm. It doesn't cut out and sometimes it is hardly noticable, any ideas? Brandon

[v70torslanda]

Suggest cleaning the throttle module and the breathers. If the brain doesn't read the throttle as fully closed it will slow the engine down until the anti-stall kicks in then slow it down again. A vicious circle develops and the idle will not stabilise. Worth a go - cost is a can of carb cleaner and an old toothbrush.

[rossibran]

Where is the throttle module then please? Brandon

[v70torslanda]

It's on the inlet manifold. It's the air inlet for the engine and also where the breather system gases are drawn into the engine.

[rossibran]

Cheers mate, will try it and let you know, thanks again. Brandon

[RaVolvoR]

Try a can of "Wynn's Carburettor and Throttle Cleaner" about £6.. ripped the black muck right off and didn't need a toothbrush! Result on my V70 was like having a new car afterwards, I had exactly the problem of dropping to 4-500rpm and cutting out as a result!

[rossibran]

Ive looked everywhere what the hell does this thing look like, I prefer the old cars with carbs and stuff, please help

Brandon

[5seaterT5x2]

Forte injection cleaner it's the dogs bits, and you just chuck it in the tank

[cornclose]

Try this :-

http://home.comcast.net/~donwillson/tech_info.html

and this :-

http://www.volvoxc.com/resources/how...y_cleaning.pdf

or this :-

http://www.box.net/shared/cjh7pkl0cs

[rossibran]

Cheers cornclose, thanks for those ace links, gonna sort it next week when I'm off I'll let you know. Brandon

[kennyt5]

I had the same problem, mine was number 2 ignition coil lead to the spark plug.

[minkymoo]

had a similar problem, that was no 2 coil pack, but the hunting was not that severe and was more noticable in drive(geartronic) try getting your fault codes read, there may be a pointer there!!! got an obd 2 code reader off ebay for thirty two notes, best buy ever!!!!!