Jump to content

Elise S2 K series 1.8 revving when started

Recommended Posts


I have a K series Elise S2

It is not running properly it starts ok first time you start it, after about 30 seconds it cuts out, you restart and it sits there revving between almost stall and 2000 rpm, also the Fan runs even though the car is cold

My fault reader gave out two codes, one for the crank sensor and one for the O2 sensor.

I have replaced both of these bit still have the same fault

After doing some reading , I also changed the TPS and the IVAC

I have posted a video for people to watch

So to date I have done the following and still get the same results

IVAC, TPS, Crank sensor and O2 sensor

Link to post
Share on other sites

It's so weird 🤯

As above:  air leak - only needs  an invisible pin hole

Did you  change Both of the O2 sensors or just one? I'm sure there's pre and post CAT (?)

Battery?  Seems to be the culprit of many Elise ailments.

TPS recalibration?

ECU reset.. disconnect battery, to you know: 'turn off and turn it on again'  (Grasping at straws now)

Good luck!



Link to post
Share on other sites

Mine behaved a bit like that when the alternator packed in and the battery was running down

I ought to add, when it did it I rang Gav at Unit 4 Vehicle Services and he immediately diagnosed it over the phone. He was immediate and unequivocal, and correct!

If it were me I'd take it to Gav, especially if it's about due a service anyway - get it all done.  He isn't dear.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Content

    • By Stewart Frandsen
      Elise S2 crash structure (one only) New
    • By graeme_laslett
      Brand new, genuine MG Rover 52mm Alloy Throttle Body and new TPS sender for the Rover K series. (Part Number MHB000261)
      A great upgrade from the original 48mm plastic version which are prone to stick and the larger diameter of the alloy body gives better throttle response.
      Suitable for all K Series engines including the VVC engine. Easy to fit, 4 bolts and reuse the existing 3 pin electrical connector.
      Sold complete with a new Throttle Position Sensor
      Order via our website and use discount code "mloc18"
      Car Service Packs
    • By Carmel1940

      I’m after some advice re the fitment of later Elise/Exige S2 rear LED lights to an earlier 2002 Elise S2 K-series.

      1) Are the units (C120M0034F outboard & B120M0035F inboard) just ‘plug and play’ or is it necessary to fit additional jump harnesses/ballast units/resistors, as well as a new flasher relay? It seems that the EU units do not require?

      2) Some of the earlier rear light LEDs seemed temperamental, is there a cut-off part number or ID on the units to identify later more reliable rear lights?

      Any experience or advice would be much appreciated!

      Many thanks!
    • By McQuack[BE]
      Hi all,
      I am the happy owner of the Lotus a Lotus Elise S, the one equipped with the Toyota 1ZZ engine. Since some time I got issues when starting up the car in very hot conditions or with warm engine. The car has high and irregular idle revs and it will not react properly to throttle. If I apply a little throttle the revs will drop... however if I apply full throttle the engine will first hesitate then settle around 3000 rpm. As you can imagine it is impossible to drive it properly... When this happens I also get the 'Check Engine' light on (MIL?). The only solution is then to wait for the car to cool down and it would then function again in a normal way.
      Since a few days I had that issue again and decided to get rid of it so I went to Lotus (Belgium - Antwerpen) last week. The tech in the workshop did something to the ECU  (clear codes maybe) so the MIL disapeared and the car worked properly again. I got back home and, the day after I took the car to do some shopping. When I got back to the car after the shopping it started agin to have that same issue and now that issue doesn't seem to disappear when I let it cool down :-( The check engine light is staying on permanently and I am unable to use the car...
      Would anyone here now what I should do to improve this situation ?
      I am adding some pictures of the car.

    • By Reverend Green
      Seasons greetings all.
      I have a problem that doesn't seem to be covered by any previous threads and am hoping somebody out there can point me in the right direction. #
      I have a K series standard S2 and have just had an exedy race and lightened flywheel fitted along with elise parts quickshift and gear linkage upgrade also from elise parts along with a new clutch lever arm the one with the grease nipple.
      My trouble is that I can't select a gear with the engine running, if I turn it off then select first then start the car and release the clutch is bites and moves fine.
      I thought it could be the slave not fully pushing the rod along, however I replaced it today and still the same issue.
      On a drive a few weeks back (fortunately at the end of the drive) selecting gear became really difficult and when I parked up in the garage I've not been able to select a gear at all.
      I've looked at the linkage at the back of the box and it wasn't put together like the pics in the fitting guide, so I've changed it a little but still can't get it into gear. I'm fairly convinced it's a linkage issue as there are no leaks in the system no loss of fluid anywhere and I rebled the system as well with my pressure bleeder. There's loads of travel on the clutch fork when I press the pedal, so if anyone has any ideas that I can try to get it moving again I'd be glad to hear from you.
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Terms of Use