99 XJ-8 Engine Hunting

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10-14-2009 | 04:34 PM

Killick

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99 XJ-8 Engine Hunting

The other day, my 99 XJ8 wouldn't start. Changed the spark plugs, checked the fuel pump relays, still no joy.

The local shop identified a bad fuel pump.

I just picked up the car, and the engine is really hunting at idle now. Obviously I'm taking it back to the shop, but does anyone have any ideas as to why this is happening?

Thanks

showing codes p0171 and p0174

Last edited by Killick; 10-14-2009 at 06:27 PM. Reason: more info

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10-14-2009 | 07:48 PM

Usdm-sti-ftw

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Joined: May 2009

Posts: 75

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From: Novato, CA

Mass air flow sensor? The lean condition (P0171) could contribute to your problems/bad MAF...

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10-17-2009 | 05:17 PM

Dinger

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Joined: Jul 2009

Posts: 112

Likes: 22

From: London England

hunting

Yes it could be the MAF sensor. I had the same problem and it only took 15 mins to take the sensor out and clean it with an alcohol based spray. The wires in mine were totally black with deposits before I cleaned it. Car now has excellent tickover whereas before the tickover was very erratic and also stalled occasionally.

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