100 series turbo diesel intermittent start fault

[Mrd]

2003 100 series turbo diesel very intermittent won,t start. Turns over but no fire. Leave it for a few minutes or may be a few hours and it starts fine. May not happen again for months. Auto electrician could find no fault codes stored. Any ideas.?

[(mr2)]

When it doesn't start are there any lights on the dash? Engine light or immobiliser light?

[Mrd]

All the dash lights appear as normal, engine turns over all lights stay on

[Mrd]

Found lots of info on 4wdaction forum with same problem and spoke with Toyota service tech. Simple solution disable immobiliser.

[(mr2)]

Simple.. it will also void your insurance if it's the factory immobiliser that you are talking about disabling. If is is an issue with the factory immobiliser the Immo light should be flashing when the car doesn't start, maybe the antenna coil on the car is faulty so it's not always picking up the key.

[Mrd]

Yes insurance would be an issue, although how would they know. It could be the reading of the key but the computer does not keep a memory of fault codes, so it has to fail when the diagnostic computer is actually plugged in. That never happens so bypassing the immobilizer still seems the best option. Starting to replace parts would get very expensive.