I have a strange problem with my Zed.

 

It has always behaved impecably but on my last couple of trips I have had a niggling problem:

 

The car stars and runs beautifully, from cold.

 

Runs fine on journey, both M/Way and A roads, no lack of performance or pinking/detting.

 

With the car warm, I stopped for fuel, when I started the car it fired fine but the idle was stumbeling all over the place, the car stalled as soon as I tried to move.

 

After 5-6 restarts it seems to rectify itself and idle returns to 750-800 and all is fine.

 

It may be unrelated but I haven't been driving the Zed as much as I used to over the past 2 months, as I've bought a run about. Could it be damp related? Today's journey was about 35miles fast motorway driving.

 

Any ideas gratefully recieved.

 

Tim

Get your throttle bodies cleaned and adjusted....had the same prob and had this done..works fine now

 

Chris

Pretty certain its not the TBs, I cleaned them only a couple of 1000 miles ago, also that sort of hesitation is more subtle in my experience.

 

Tim

Hiya Tim, hope you're ok mate!

 

Have you checked the wiring to the temp sensor?

Does it do the same with the a/c on ? If not then check out the connections to the AAC valve.

I would check the AAC valve for a gaskett leak and they the tps connector. You can prove it's the tps disconnecting it (pull the plug in the engine bay) next time the engine is running strange. If it settles down correctly after 10 seconds or so - it's the TPS.

 

FYI - The car reverts to a default idle with the tps connector disconnected.

It's not the TPS as I had that set on the Shift-at-will display which shows TPS as a % from 0-100, and it was accurate.

 

AAC valve - would this suddenly develop a fault? Car has only just started behaving in this manner, I have stripped and cleaned these valves but not for 6 months or so.

 

Thanks Andy, I always drive with the Climate on Auto so I'll see what happens when I switch it off next time.

 

Tim

AAC is NOT related to fast idle - thats the FICD valve :p AAC will cause rough running if its become sticky - remove the rubber hose and squirt a load of carb cleaner in there. I doubt it is that though tbh m8. Is the electric fan on all the time? Any error codes??? Checked the CAS and PTU connectors? Injector connectors and coil pack connections too?

 

HTH

 

CheerZ,

 

Andy

 

PS Yeah you're right m8 - I am *JUST A BIT* busy :(