Sticking Throttle? [was : S1 engine problems]
Discussion
Noticed this for the first time this morning.
Put car in neutral and the revs stuck at about 3000, put car back into gear and straight out again, and they returned to normal idle speed (less than 1000).
Wondered if this was likely to be something to do with the Engine Management Unit, or possibly a sticking throttle?
Have had the car for about a week, its a 99/T, so I guess it has the metal rather than plastic throttle bodies?
If a tank of Optimax and a good run this weekend doesn't fix it, I'm going to hassle the garage, but I'm aware that on some cars this is a bit of a 'feature', and not an indication that anything is actually wrong.
Just wondered about anyone elses experiences, and if they had a similar problem and it's resolution.
TIA
Clive
Bit more info:
This is an intermittent problem, only happened twice ever - both times this morning!
Wondered if this could perhaps be a vunerability to damp conditions (wet morning, and I'd washed the car this morning)?
>>> Edited by Dr Bob on Thursday 20th June 12:32
Put car in neutral and the revs stuck at about 3000, put car back into gear and straight out again, and they returned to normal idle speed (less than 1000).
Wondered if this was likely to be something to do with the Engine Management Unit, or possibly a sticking throttle?
Have had the car for about a week, its a 99/T, so I guess it has the metal rather than plastic throttle bodies?
If a tank of Optimax and a good run this weekend doesn't fix it, I'm going to hassle the garage, but I'm aware that on some cars this is a bit of a 'feature', and not an indication that anything is actually wrong.
Just wondered about anyone elses experiences, and if they had a similar problem and it's resolution.
TIA
Clive
Bit more info:
This is an intermittent problem, only happened twice ever - both times this morning!
Wondered if this could perhaps be a vunerability to damp conditions (wet morning, and I'd washed the car this morning)?
>>> Edited by Dr Bob on Thursday 20th June 12:32
Hi,
All S1s have plastic throttle bodies as standard. You can easily check what you have by opening your boot and looking at the bit between the air intake hose and the plenum. These are the bits nearest you when you're standing directly behind the car. You can identify the throttle body by the throttle cable attached to it.
Chances are you have a plastic one, but that still might not be the actual cause of this problem.
You should check things out because you do NOT want your throttle sticking fully open out on the road, especially mid corner.
Things to check.
- Get someone to depress the throttle pedal (engine off) and watch the movement of the body. It should move cleanly and not hit anything. It should spring back to closed when the pedal is released.
- Get your head under the steering wheel and check the amazingly convoluted throttle linkage - check that the cable is not frayed and all connections on the bracket are tightly done up and in place.
I had the same thing as you, and it wasn't caused by the plastic throttle body, it was poor cable adjustment. 10 mins with a spanner fixed it. I have since fitted a Trophy 160 throttle body anyway.
If you continue to have problems, my bet is
a) it was a one off occurence... the elise has lots of these!
b) your Idle Air Control Valve is blocked/dirty/broken
Good luck
All S1s have plastic throttle bodies as standard. You can easily check what you have by opening your boot and looking at the bit between the air intake hose and the plenum. These are the bits nearest you when you're standing directly behind the car. You can identify the throttle body by the throttle cable attached to it.
Chances are you have a plastic one, but that still might not be the actual cause of this problem.
You should check things out because you do NOT want your throttle sticking fully open out on the road, especially mid corner.
Things to check.
- Get someone to depress the throttle pedal (engine off) and watch the movement of the body. It should move cleanly and not hit anything. It should spring back to closed when the pedal is released.
- Get your head under the steering wheel and check the amazingly convoluted throttle linkage - check that the cable is not frayed and all connections on the bracket are tightly done up and in place.
I had the same thing as you, and it wasn't caused by the plastic throttle body, it was poor cable adjustment. 10 mins with a spanner fixed it. I have since fitted a Trophy 160 throttle body anyway.
If you continue to have problems, my bet is
a) it was a one off occurence... the elise has lots of these!
b) your Idle Air Control Valve is blocked/dirty/broken
Good luck
quote:
Bonce can you get the body as a part from MG dealers?
Yes. You can also get it from www.race-speed.com but I understand that european stocks are a bit low at the moment due to it being the 'in thing' amongst Elise and MGF owners.
Had a look a the S2 engine at Goodwood yesterday and saw that they now use the alu throttle body as opposed to the placky version in the S1. The S2 190 Motorsport they had there looked good too although not sure about the £34K price tag when you look at other cars in this price bracket.
PC
PC
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