Disco V8 1995 Efi Idle issue

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W

wamccutcheon

Guest
Hi everybody,

A newbie to this site and desperado for some information please!!!!

I have 1995 (M) Discovery 3.9Efi V8, it drives a dream and has never let me down, HOWEVER.........

When the engine has been on a run and is at normal operating temperature and the car is brought to a halt, say at traffic lights or stopping to a halt generally, it has a tendancy to run lumpy as if it wants to stall, but never does!

The revs hop between 500 to 750rpm, but only when at a halt and only when running at operating temperature. I never get the issue when it is running from cold.

It almost feels as if a plug or lead is failing, but all have been replaced along with new oil, filters, rotar arm, disty cap etc etc. I opted for OEM parts for the reason that I believed that the previous bits were pattern, but still no joy.

The problem seemed to start almost from nowhere and have never had any issues before. I am guessing that something is failing, but am at a lost as to what? It is becoming a real hassle and I fear it is getting worse, albeit slowly.

Does anybody have any ideas. I want to try and avoid having to send her into LR as it will no doubt cost me a fortune for any exploratory investigation!

Many Thanks and great forum by the way!

Will.
 

joey

Custom Rover Accessories
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Clean the TPS (throttle position switch) or IAC sounds like it is dirty. Do a search on hear for a pic of where it is located.
 

beemer

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IAC on the 95 is the same part as on a GM V6 motor. I collected a few from Pick-N-Pull, cleaned then lubed with a dry film moly spray, solid idle rpm control and didn't get ***** by the stealers.

.....=o&o>.....
 
M

moveoverover

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joey said:
Clean the TPS (throttle position switch) or IAC sounds like it is dirty. Do a search on hear for a pic of where it is located.
How do you clean the throttle position switch? Thanks in advance
 

joey

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search for the photo, then you unplug, remove and clean with some non-residue contact cleaner.
 

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