Immobilizer no start issue.

You may have mixed up the 2 engine harness connectors behined the passenger seat. You have the main ECU harness..Can't mix up that one..but be sure the 2 other connectors are connected to the matching connectors colors. White to white, and that other odd color to its match.

Edit... I may be getting confused with the 348. One of these cars the harness connectors can go either way. But it's something to check..

 

Yes, but did you check the pump was priming immediately after? This checks the relay, the wire, the pins at both ends and some of the ECU internals. I didn't mean resetting the battery to see if your car started.

Did you confirm the blue plug was on the cam sensor (or didn't you disturb it)?

Did you disturb the TPS connector?

Prior to the engine out, did your car normally crank, but not start if you forgot to disarm the immobiliser? My car doesn't crank. Later model cars seem to crank anyway. I'm just trying to determine if the starter on your car is controlled by the immobiliser. If it is, then it's less likely to be an immobiliser/Motronic ECU issue.

 

Do you have an OBD2 scanner? These don't communicate with the Motronic ECU if your immobiliser is not disarming.

 

If you are still thinking an immobilo prob did you try starting with the extracted pin? The pin bypasses the fob, fob battery connections, antenna to transmit issues etc. The pin makes starting the car like starting any other but with just a key sequence. if the pin does not start car I'd look somewhere else especially if no start is after engine re-install. You missed something bent 88pin connector pins etc etc.

 

Great happy ending! These cars are unreliable unless a lot of attention to detail is exercised. What Mitchel posted about mistakes like the while you are in there failing to replace o ring seals, cam timing etc is very true. Those details are the difference between a running car for now and a fantastic running car to its full potential with reliability. For now just enjoy it.

 

I remember being at a car show and dropped my key, needless to say, the remote stopped working and was stranded. They should have designed some way to get around it.

 

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I'd be curious to know which pin was bent. The pins on the plug with the larger pins have been known to cause issues (e.g. the coil power pins). That's the transparent plug, though, not the white plug. Tom ( @tbakowsky ) mentioned the plugs, but I forgot to follow up with details.

 

Thats what the pin code is for.

 

I have no idea what the pin code is. After all these years

 

A 4 digit numeric code on a piece of paper that was supplied with the car when new ( as well as 3 remotes ). Most likely a former owner "put it in safe place" and forgot about it.

 

Ah. I do have the other red remote. That day, I was quite a distance from home. Luckily my mechanic, saw me sitting there when passing by, took my back to his shop to open the fob up and replaced the battery. It was fine after that

 

Bent pin, that happened to me once. Same white connector. $100 bet it's the pin that runs to the fuel pump relay.

 

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