I am at my wits end with a 1980 ZX fuel injection system.

[needhelp]

So far I have had the ECU and air mass sensor sent away to be tested and they were found to be ok and the calibration was good. I have replaced the thermotimer switch and the temperature sensor. All terminals have been cleaned and fitted with new clips but 1 in ten starts it is so rich it just floods the engine with fuel. I clean the plugs and leave the car for a few days and mostly it will run ok for a for a few more days and then the flooding starts again. Has anyone else had this problem. I am in desperate need of some new ideas.

 

[KCZ]

You may have better luck on ZDriver.com or ZClub.net forums, which have subforums for the 280ZX.

 

[Koryak]

I used to work for a Datsun dealer when the injected 280 first came to the U.S. Assuming your injectors are high mileage I'd start with having them flow tested & checked for leakage. The symptoms you describe sound like intermittent leaking, possibly caused by internal deposit buildup.