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George, thanks for your help. Not only did i have one of the speed sensors disconnected from the gearbox, i had not yet hooked the STA wire back to the start relay for +12v when cranking. For now the NSW is connected into the start relay until i get the auto column shift setup and i will...

Bushwhacker you are the man! I wired the immobilizer back in with the key and the transponder taped together and it ran like a dream!

Thanks George, i will double check this but as i mentioned in one of my previous posts i have only modified the 28pin plug from the ECU, the STA signal is on the 34pin plug which is part of the unmodified OEM engine loom. I will report back with my findings over the weekend.

Thanks Bushwhacker I will try eliminating the immobilizer over the weekend and post back my findings. Thanks for all your help.

The car was running perfectly before we pulled the engine out, we only moved it 2-3m onto the new chassis so its doubtful the timing is off. All 3 sensors read within spec but im not eliminating a fault with them at this stage.

You are braver than i tapping injectors with a hammer! If it comes down to this i will take the fuel rail off and inspect/clean the injectors.

Initially, before i actually got it to fire up for the 3-5 seconds i got at least 5 codes from the ECU all of which were either to do with the MAF or O2 sensors being dissconnected (which they were). Now i only get one code, code 12... i have read that swapping the ignitors might give me a code...

Damn i thought as much, you wouldn't happen to know anywhere i can get the pin-out diagram or the immobilizer? Luckily I have a key etc as this was all form a running (but written off) LS400 which is a bonus, however i will probably modify the immobilizer so there is no key required if i cant...

Bushwhacker, just so we are clear, my ECU does not have the immobilizer built into it, it is a separate unit, does that matter? It Looks like this:

I figured it wouldn't start at all without the Immobilizer connected, there is one and i do still have it... Interesting, i will try and source on older ecu, if all else fails might have to try and wire the Immobilizer back in.

Hmm, i guess i should double check my wiring... I will get some pic's over the weekend, i have been working off several different diagrams and Nigel Wade's documentation. We just wanted to get it started as it has been sitting for a year so the 3-5 seconds was OK but we will eventually need to...

Hi all, I am currently swapping a 1997 LS400 1UZFE into an old 50's F100 body and am having a few issues getting it to "stay started". I am using the OEM engine loom connected into the OEM ECU with some custom wiring which i will explain below. Basically the engine fires up for around...