KW-rscos

Changed the timing belt and now its hunting badly, all the timing marks are lined up correctly, I checked no metal on metal by rotating the engine several times by hand, tension is a firm 90degrees at the midpoint if the longest point, it starts fine then after about ten seconds of good running it hunts between 500-1200rpm! Drives ok, what could it be??? There is also a wine as it hunts, but not otherwise??

Cragrat

iTrader: (4)

Have you knock and damaged the coolant? sensor at the back of the head

Had a cossie of mine hunting and was advised this was the culprit

KW-rscos

Don't think so, can't see anything obvious anyway and didn't touch anything inthe back of the block.

TOMMY_TURBO

is bottom pulley defiantly lined up right?

jb 3 door

Has the distributor pulley moved,have you checked for air leak,if you disconnect the idle speed control valve does it tick over evenly,may be lowish,if so just need to re set idle speed on throttle body to 850rpm then reconnect idle speed connector,hope that helps

KW-rscos

Yeah the bottom pulley was lined up to the trailing edge of the cps lug against the block, will recheck inthe day light tomorrow.
The auxiliary pulley was in the correct position when I checked, but if that had slippe a tooth could that still mean it runs correctly for a few seconds before deciding to hunt?

jb 3 door

you have proberbly spot on with belt,just needs idle speed setting up,it sounds like the idle speed control valve isnt settling

martysmartie

iTrader: (1)

I suspect you have the aux pulley out (This also has to be timed correctly and thus has a marking).

TDC it and check that the rotor arm is at the 2 o'clock position...

Martin

KW-rscos

Thanks guys, will check these when I get home.

Martin, would that still be he case if it idles for the first 20secs or so correctly after start up then starts to hunt?

martysmartie

iTrader: (1)

Disconnect the ISCV, it will be this raising the speed, but it is acting like this due to the timing being wrong, probably.

Martin