[V8] 5-Spd High Idle

Ingo Rautenberg ingo.rautenberg at gmail.com
Sat Nov 22 15:24:21 PST 2008


A couple of things come to mind:

1.Vacuum leak
2. Sticky throttle linkage

I've had both.  IIRC leak in mine was the hose that goes back to the carbon
canister (plastic hard line by the passenger side firewall).

To lube the linkage properly (I like to use a teaspoon of ATF), remove the
bottom of the airbox and lube the rear linkage.  For the front, remove the
idle stabilizer valve and then the front throttle body assembly entirely.
with it removed you can check to see if there is any sticking in the
throttle body (doubt it).  Then there's a pivot and bearing for the front
linkage where it attaches to the throttle body.  I'm guessing that part has
dried up and that'swhere you may well find resistance (happened with my
Pearl '91 5 speed.  Lube it up, work the linkage a bunch of times, align and



On Sat, Nov 22, 2008 at 4:48 PM, <bblake1055 at aol.com> wrote:

> Can anybody tell me where to start to find the problem with a 93 5-spd high
> idle?
> The car has been sitting 3-4 weeks and when I drove it about 3 miles the
> idle would not return.? It was hanging at about 2100 Rpms and on the return
> trip home it was hanging even higher. 3,000 - 4,000rpm
> If I put it in gear it would come back down but as soon as a put the clutch
> in it went back up.?
> I checked the obvious as far as the pedal and linkage and they are fine.
> Throttle positioner sensor?
> Idle valve need cleaning?
> Any help would be appreciated
> Bob Blake
> 90 V8 (for sale $1,000)
> 91 V8
> 92 V8
> 93 V8
> 93 V8 5-spd
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