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High Engine Idle 1998 Paul Smith

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Best Answer paulsmithman , 28 March 2017 - 08:01 AM

Thanks for all the replies. Very useful! Had a check of the throttle cable, inlet manifold/throttle body and idle air control valve and while i was there noticed a chewed wire. Turns out some mouse had chewed through one of the 3 wires relaying from the Throttle Potentiometer to the ECU, which must have been affecting the relay and making the adaptive idle system think the throttle was open. Fortunately it was easy to access only needing to remove the air filter body and throttle breather tube. There was excess length in the cables so cleared it up, spliced back together, taped up and back idling around 900. Have also laid a load of poison under the bonnet and around the garage to prevent any further rodent related issues!

 

Cheers guys!

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#1 paulsmithman

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Posted 24 March 2017 - 07:07 PM

Hello

New to The Mini Forum and the mini enthusiasts world and hoping to get some advice. 

I'm the proud owner of a 1998 limited edition Paul Smith Rover Mini (with all the signature detailing, green rocker cover etc). 

Has in the past few days start idling very high particularly once up to temperature. When sitting at traffic lights is now sticking anywhere between 1800 to 2000 revs in neutral. Can sometimes get it to come back down by tapping the throttle, but this is unreliable. As soon as it's in gear the revs come back down to normal.

Is stored in a locked garage and only driven every couple of weeks to keep things turning over. I've stopped taking it out until I can get this fixed.

Looking for advice on what could be causing this before i take it in to the garage so as to avoid being walked over by any mechanic. On that note if anyone could recommend a good place to go in the West Midlands area i'd much appreciate it. Have so far heard of either Surf Blue in Nottingham or Old Skool Minis in Birmingham.

Cheers

 



#2 ukcooper

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Posted 24 March 2017 - 10:24 PM

http://www.theminifo...pecific-spimpi/



#3 cian

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Posted 24 March 2017 - 10:39 PM

Inspect the idle air control valve hasn't cracked be all vacuum pipework

#4 FlyingScot

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Posted 24 March 2017 - 10:49 PM

Moved to injection section

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#5 Fast Ivan

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Posted 27 March 2017 - 01:14 PM

a lot of high idle problems are down to air leaks, so check in and around the inlet manifold/throttle body area for leaks and split/damaged hoses

check that your throttle cable isn't getting stuck or jammed

remove and clean the idle air control valve (IACV), a search will give details of its location etc.

it also could well be down to the throttle body warping when it gets hot, this is a little more difficult to prove other than swapping it out

 

these are the basic things to check first, have a look and let us know



#6 paulsmithman

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Posted 28 March 2017 - 08:01 AM   Best Answer

Thanks for all the replies. Very useful! Had a check of the throttle cable, inlet manifold/throttle body and idle air control valve and while i was there noticed a chewed wire. Turns out some mouse had chewed through one of the 3 wires relaying from the Throttle Potentiometer to the ECU, which must have been affecting the relay and making the adaptive idle system think the throttle was open. Fortunately it was easy to access only needing to remove the air filter body and throttle breather tube. There was excess length in the cables so cleared it up, spliced back together, taped up and back idling around 900. Have also laid a load of poison under the bonnet and around the garage to prevent any further rodent related issues!

 

Cheers guys!







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