Engine revving to max rpm

[Dutchman99]

Ok so today my clio 172 went funny 140 mile round trip no issues then stopped to drop something off at a shop and boom. Running funny. Very similar if not the same to when an injector went and was running on 3 cylinders. This isn't my concern. My initial instinct was plugs leads and coil pack so off comes inlet manifold(didn't detach air box initially) checked the leads and plugs all seems fine. Waiting for my brothers diagnostic machine to tell ,me the damage when he returns from holiday. Went to start up see if anything changed and now it just revs to max rpm when I turn it on. .......I checked the throttle body and the butterfly valve (I think it's called that) opened easily enough and with the throttle cable being some way away (I believe) I didn't know what else it could be? Suggestions

 

[imprezaworks]

Have you got floor mats? I know it's a daft question

 

[MG cup]

You have left one of the pipes off the inlet, probably the one that goes to the carbon canister, or you haven't stewed down the inlet properly.

Basically you have an airless somewhere.

 

[dann2707]

You could have trapped an lead when tightening the inlet down so it's not sealing properly. Happened to me and scared the life out of me when I turned the engine on.

 

[Dutchman99]

Thanks for the help chaps. The revving was indeed an air leak. The gasket at the back of the inlet manifold had fell off and I didn't even see it. Was resting on y exhaust manifold.

The other issue turned out to be a squashed ignition lead I think. Really squashed. Replaced it and it's lovely.

As always your guys are awesome.

 

[dann2707]

Yay, glad you sorted it mate. Happy motoring.