Guest Posted March 15, 2014 Share Posted March 15, 2014 I have a 175 Roadsport, 2L Duratec, 5 speed box, non LSD. The ECU is Caterham part number 30L152A (R300 Plastic Plenum). I have had the car running a few times now and just can't find a sweet spot for cold and warm idle. The car is going for a PBC to midlands soon but you know how it is, you want to fix it yourself or at least know what's up. I have read various threads about the TPS voltage needing to be 1.03V but I am not sure if that was for a 2L Duratec. When I set the brown to white TPS to 1.03 (by adjusting the screw), the car would not start and stay running. I did turn the key to position II and disconnect the battery as I had read that may reset the ECU. However no luck with the TPS at 1.03V. When cold I need to set the TPS to ~1.07V to get the car to run steady. However if I start to rev the engine then it takes a few hunts for the car to settle. As the car warms up I seem to need to set the idle faster (TPS ~ 1.1v) to stop it hunting. It all seems a bit of hit and miss. I have had a look at the butterfly to ensure it fully closes and the air intake is not disformed. I have also checked the plenum and pipes for leaks but car see or feel anything obvious. My mindset is that I have a friday engine as a few bolts were not even done up and the alternator spindle bolt fell off on the first few fire ups. If there is any obvious reset or tweaks I should make to get to a steady point I would appreciate it. Otherwise I guess I will wait on the PBC. Link to comment Share on other sites More sharing options...
Alan Reeves Posted March 15, 2014 Share Posted March 15, 2014 we had an issue with my new build like that and I am sure it was concerned with a poor earth...also 175 Link to comment Share on other sites More sharing options...
Guest Posted March 15, 2014 Share Posted March 15, 2014 Thanks Alan, I have just put another 16mm earth on the battery but this time taken it to the chassis thread next to the battery. No change I'm afraid. I can set it to run ok cold but then it hunts warm etc etc. Still lumpy throttle response. I unplugged the TPS connector and nothing changed with the way the engine ran. Not sure if that is as it should be or not. I'm sure caterham plugging in a PC will solve it. Andrew Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted March 15, 2014 Area Representative Share Posted March 15, 2014 Quoting AndrewB: I'm sure caterham plugging in a PC will solve it. Andrew So am I. See you on 14th. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now