Sudden loss of power/revs

W

Watts

Member
Hi

I am new to A20C so hello to everybody.

Sorry to start with a problem but I have a a2 1.4se and have recently been experiencing a sudden dip in revs/loss of power. The engine dosn't totally cut out but dips for a few seconds then comes back to normal.

Sometimes acceleration can be quite lumpy when pulling away at low revs.

Any ideas, take it to my local mechanic, usually very good, but he can't work it out.

Thanks

1.4SE 2002 75K
 
camshaft sensor. If it's an AUA, then on the top right of the engine as you look at it from the front of the car - there's a sensor bolted in place with three / four cables. That one, especially if there's no fault logged and you don't have to turn the key.
Try unplugging and re-plugging the connector first before replacing the sensor, though IIRC it's not expensive.

Bret
 
Hi Bret,

Thanks for your help on this, I changed the camshaft sensor which was easy enough and made a great improvement. But now I have a similar problem which means the car never starts first time and occasionally it totally cuts out and switches off totally when running at medium revs and med/high gear.

The warning lights flash and management light comes on. using the key the engine starts again but with management light on, this usually goes out over night and is not lit when the car is next started.

Any ideas, thanks in advance

Andrew
 
Id take the cambelt cover off and check all of the timing mark are correctly aligned before replacing anything else as the symptoms you are describing sound like the belt has slipped a tooth.
 
Thanks Rob,

I'll have a look is there anything I should be looking for to prove slippage?

The cam belt and pump where changed not long ago!
 
well if the belts been changed recently then hopefully it shouldnt be that but it still should be your first point of call.

if you are mechanically confident the way to check for slippage is to remove the upper cambelt cover (simply undo 3 clips securing it in place) and manually turn the engine using a torque wrench or similar until the the notch on the crank pulley is lined up with the tdc mark on the lower cambelt cover. At this point the locking holes on the camshaft pulleys should either be 270 degrees for the inlet cam and 90 degrees for the exhaust cam or 90 degrees for the inlet and 270 degrees for the exhaust. If its the later then you should be able to see a hole behind each in the cylinder head which as what is used to lock the cams with when changing the cambelt using 8mm dowels. If you cant fit the dowels in now then the belt has slipped. Any competent mechanic should be able to sort you out in 5 mins if you dont fancy doing it yourself.

If thats not the problem then there are a few other things that i can think of but that would always be my first check.
 
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