Fuel mixture problem and Japanese manual

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Hi!

I have a 1999 RX7 Japanese model with fuel mixture problem.

The lambda emissions value is far too low which means that the vehicle is running VERY rich. Lambda reading is around 0,8.

When we checked if the ECU had any error-codes, the ECU stated:
Code 45:
"Failiure on pressure valve" (or something like that)

Apparently, one of the valves on the vakuum hoses (below the intake) is malfunctioning. The problem is that Mazda here in Europe only has documentation for European models up to 1995. I got a new pressure valve, but there were two problems:

1: It\'s not the same valve as on my 1999 RX
2: There are more than one identical valve in the car (there are three or four on my car maybe not exactly the same, but the blueprint that we looked at at Mazda on a 1995 car showed around six valves with that same part number located under the intake).

So what I\'m basically trying to do is trying to locate the malfunctioning valve on my car. We checked the resistance on the valves, but they were all equal. Do you guys have any other advice on how to find the malfunctioning valve?

Is there some sort of documentation available on the internet for the Japanese models that might help us?

Can any of you guys help us in finding the correct valve for my car? The one that Mazda ordered for me, that looked a little bit different (mainly different type of electric-connection) has part number: 1480 13 240A

I figure that when the ECU gets this error code, it switches over to fail-safe mode which in turn adds a lot of extra fuel in the mixture which shows in the emissions results. What do you guys think?

Thanks for your time folks!

[Timrxmotors]

Make each solenoid click by putting 12v across it.The dead one will not click.The car is probably in \'fail safe\' mode,which fixes the ignition and fuel to a set value.

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Originally posted by Timrxmotors
Make each solenoid click by putting 12v across it.The dead one will not click.The car is probably in \'fail safe\' mode,which fixes the ignition and fuel to a set value.

Thanks, great idea. Will try that tomorrow and keep you guys updated. If you have any other ideas write them in this thread.

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They all clicked and I checked ohms on all of them again and they showed similar values. Next step in testing?

I could take them all out, blow through them and clean the air-side of them. Maybe some oil or something that causes malfunction now and then, but not constantly?