Hey people, ive got an s1 190, and am having trouble getting it started, not everytime however, it intermitent. Had the AA out and he carried out a few tests, and was sure it was the crank sensor, so we changed that, and great started 1st time.
The next day nothing, After further investigation we found a fuse had gone in the rear cabin bulkhead. so we changed fuse and had been fine the last few days. In the booklet its shown as fuse 2 3A Engine Management OBD2.
The car is perfect when started, cant fault it in any way! Last night i went to start it, and nothing, looked at the fuse and it looked good, anyway tried another fuse and started first time. Thought that was a bit strange so tried the one i just took out, and it went straight away, which is leading me to think it was a bad connection and it was the fuse holder???
We spoke to a few lotus dealers/specialists and rather suprising the first 2 didnt deal with exiges. Since speaking to them every inch of wiring has been checked and all looks great. the fuse itself is connecting the OBD2 diagnostic plug and the ECM, the plug is fine.
Sorry to woffle on a bit, anybody know of any ecu faults? or any similar problems before? We are changing fuse holder 2mo, if that doesnt work then i guess the ecu needs testing?
Also had a problem with blowing the same fuse, four times within a couple of hundred miles. Did also have fuel pump fuse blow as well during that period.
Ended up having to replace fuel pump… 1000 miles later no problems, cars going great. Hopefully yours is easier solution!!
Yeah I would bet on an ECU sensor wire shorting out somewhere. Try water temp sensor (brown one), idle speed control valve, crank sensor, coil pack wires, throttle position sensor.
right checked out everything, fuse holder and wiring looks mint! It only seems to blow after you leave it for long periods, other than that i could start it 20 times on the trot.
i have noticed that the temp reading is now a bit irratic, compared to how it is normally. But not sure how it is connected? Any other ideas guys? im sure its nothing major as the car is solid when running, just really frustrating
around the area of the ignition coils, in the coolant pipework you will see TWO temperature senders (a blue one and a brown one). The blue one is the STACK unit temp guage sender the brown one is the coolant temp sender to the ECU.
Check these are good and also check the wiring quite a long way back… my bet would be that you have an intermittant short/exposed/damaged wiring on one of these ? or that the blue sender is dodgy ?
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