johndavies Posted August 19, 2002 Share Posted August 19, 2002 My car stalls when foot is taken off the accelerator be it hot or cold engine. Initial diagnosis is ECU not giving throttle potentiometer (sp?) information. ECU has been "re-mapped", throttle body cleansed other connections all checked. Does anybody have any ideas?? Thanks Link to comment Share on other sites More sharing options...
ECR Posted August 19, 2002 Share Posted August 19, 2002 John Tell us which car you have ? Standard ecu ? (a new post gets you back up the list as well !) Ex Chairman Roger Link to comment Share on other sites More sharing options...
johndavies Posted August 19, 2002 Author Share Posted August 19, 2002 Sorry about that, i realised after i had posted that i didnt mention what car i had. I have a Caterham 7, 1.4 Supersport - upgraded. Link to comment Share on other sites More sharing options...
scooby dooby doo Posted August 19, 2002 Share Posted August 19, 2002 how is it upgraded? the standard ECU can't be mapped so is that a different one? MBE, Emerald or Motec for example? HOOPY CYCLE WINGS CUCUMBER Link to comment Share on other sites More sharing options...
Peter Carmichael Posted August 19, 2002 Share Posted August 19, 2002 On the 1.4 Supersports with the ali inlet manifold and plenum, there is an adjustable stop at the throttle body. You can set the idle with this. Link to comment Share on other sites More sharing options...
johndavies Posted August 19, 2002 Author Share Posted August 19, 2002 The ECU is fitted as standard to the K series engines, which i think is Rovers own MEMS, i assume the ECU used for the standard engine may be different from that supplied on the upgrade engines. i am not that technically minded. The ECU fitted is the original as supplied with the car in 1995 and when I referred to it being "re-mapped" i ment the values for each piece of equipment had been checked and reset according to the readings on the screen obtained from the diagnosic equipment. This is what i have been told by the garage that have my car! Link to comment Share on other sites More sharing options...
johndavies Posted August 19, 2002 Author Share Posted August 19, 2002 Does anyone have any ideas??? Link to comment Share on other sites More sharing options...
SJL Posted August 19, 2002 Share Posted August 19, 2002 Coincidence or what - I have the exact same problem on a 1.6K ss - cutting out when clutch depressed. Spoke to Caterham who suggested turning in the throttle body stop screw one turn - they had heard this one before. Explanation being that there is not enough air bleeding past closed butterfly before idle bypass kicks in (which it sometimes does but sometimes not quick enough) I wish they were all this easy ! Link to comment Share on other sites More sharing options...
ECR Posted August 20, 2002 Share Posted August 20, 2002 Did you try this John and did it work ? Link to comment Share on other sites More sharing options...
johndavies Posted August 20, 2002 Author Share Posted August 20, 2002 Thanks for the intro to the website, the suggestions that have come in have been implimented and we are down to the ECU not giving out correct mixture readings. Caterham have told me they cant supply ECU's for the 1.4 supersport and niether can they mend them. Ideally I would like to borrow an ECU to see if our findings are correct then I would need to find somebody to repair the ECU or buy one second hand or pull my hair out if any is left!!!! I will keep you informed. Link to comment Share on other sites More sharing options...
Peter Carmichael Posted August 20, 2002 Share Posted August 20, 2002 Have you tested to see that the crank is spinning freely. With the plugs out put a torque wrench on the front pulley bolt and it should turn at less than 22lbft, IIRC. Remove torque wrench and refit plugs before attempting to start engine. Link to comment Share on other sites More sharing options...
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