Please help

A friend has a Lotus Elan S2 which keeps cutting the revs under acceleration. The knock sensor has been changed but has not made a difference. Some time ago the ECU was remapped and it is running slightly higher boost pressure, but this problem developed almost a year after the work was carried out. He has tried millers, but to no avail. I know this isnt an Impreza, but hopefully the cure for detonation may be the same

Thanks

[This message has been edited by benny (edited 26 July 2001).]

 

top

 

top

 

If he still gets the problem using Super Unleaded and Octane Booster I would strongly suggest dropping the boost or avoiding high revs. If the car is detting often then sooner or later the engine will go BANG!

 

Just to clarify some of the details. The engine violently hesistates and the revs drop approx 1-2000revs. This happens during normal (not hard) acceleration, between 2-3000 revs (so not on boost/just coming on boost), particularly when the engine is cold.

Thanks

 

Doesn't necessarily sound like det to me.

Sounds like it could be a number of things, possibly an ECU controlled boost cut - especially if it is a relatively violent response.

Det only produces violent responses when the engine lets go!

Trout