Gs300 - Running Lumpy!

[Pewe]

I have a '94 GS300 and it has been laid up for the last 11 months.

After a quick Battery charge it started immediately on first turnover this morning - but it is running lumpy.

Forgive my mechanical ignorance, but I would describe the problem as the same sort of lumpiness when a four cylider is firing on 3 cylinders.

Can anyone suggest what the issue may be (hopefully it it not overly complicated) so I can start some diagnosing.

Thanks.

[Pewe]

90 views and no one any suggestions - I am surprised.

Only a few days left and I'll have to take it in somewhere - ah well 'that's life'.

[wow300]

Give it a good run see if clears

[TigerFish]

Have you tried some fresh petrol?

[BenIS]

Are the spark plugs all ok? Are all the ht leads on properly/securely?

[Keith Bowler]

Not sure if the Mk1 has an EICV (Idle Control Valve) but worth a check.

I had a Rover 827 for many years with the Honda V6 and that always ran 'lumpy' till i cleaned the EICV.

[Pewe]

Thanks for the suggestions guys, will try them over the weekend and see how it goes.

If anyone has any other suggestions - please chip in.

[Pewe]

Ok -today had time to look for the problem.

I took off the front and back covers to get access to the spark plugs and ht leads - and there it was - a mouse nest.

During the short time I had the car parked up, the mice had built a nest under the rear cover and chewed completely through the HT lead to the rear sparlk plug.

I repaired the lead using a sewing needle and some insulating tape, but obviously now need to replace the lead.

Anyone know the best place to get a replacement lead from ????

[steve2006]

Perhaps a local motor factor could supply one the correct lenght and with the correct connections or a local breakers yard.

Most HT leads are sold as a set.

Have a look at these to see if it is the same as yours.

http://www.ebay.co.uk/itm/LEXUS-GS300-3-0-24V-DOHC-97-05-2JZGE-ENGINE-SPARK-PLUG-IGNITION-HT-LEADS-WIRES-/170718914305?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item27bfa3e701#ht_1841wt_1189