Tickover/idle

[johndavies]

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

[ECR]

John

Tell us which car you have ?

Standard ecu ?

 

(a new post gets you back up the list as well !)

 

 

 

Ex Chairman Roger

[johndavies]

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.

[scooby dooby doo]

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

[Peter Carmichael]

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.

[johndavies]

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!

[johndavies]

Does anyone have any ideas???

[SJL]

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 !

[ECR]

Did you try this John and did it work ?

[johndavies]

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.

[Peter Carmichael]

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.