Mazda FS ECU on FP engine

[@hzy1014]

A very informative video again. Thank you so much! May I ask how to access the Mazda Electronic Parts Catalog?

[@Mazda626GF]

Unfortunately, it is not a free software, use Google to find it :/

[@liorlevi3991]

Interesting video, I have a question... if you disconnected the knock sensor or left it connected but not physically on the engine, maybe the performance would be better? Because the ignition timing would have remained normal and not changed? A second interesting thing, I noticed that in the exhaust test - the lambda was 1 on both computers, so there may be a possibility that the performance will improve when the knock sensor does not "interfere" in the test. And as always, thanks for the video and big like👍

[@Mazda626GF]

Yes, that is exactly why I get hesitation - knock retard :/

[@liorlevi3991]

@@Mazda626GF Ok, so maybe you should do a repeat experiment without the sensor? Or have you already tried?

[@Mazda626GF]

@@liorlevi3991 I didn't want to risk it. Knock sensor makes sure dummies like me do not blow up the engine. + I know my engine is not in a good condition. I plan on fixing it next summer, and then I can repeat the tests.

[@liorlevi3991]

@@Mazda626GF I understood... the truth is that you are right, it is really not worth taking such risks that can cost the engine

[@jakov175]

Interesting, my 97 626 GF with a 1.8 FP (66kW) has a knock sensor on the back of the engine, no OBD2 or CEL included unfortunately so diagnosing any problems is a nightmare, and acquiring the diagnostics tools for the 17pin connector would be too expensive.

[@Mazda626GF]

Well, you can make yourself a free Mazda Diagnostics port to OBD2 adapter cable. The GF uses K-Line (ISO 9141-2) protocol, marked as MEN on the Diagnostics port. If you do have this pin, then you are good to go. A quick search on the Internet shows this as a result automehanix.ru/cars/raspinovka-mazda-17-pin Hope that helps ;)

[@jakov175]

@@Mazda626GF I have tried that but sadly with no success, even acquired an OBD2 scanner from a reputable company that lists support for the protocol but I couldn't get it to connect. I might give it another go, thanks for the link.

[@Mazda626GF]

@@jakov175 Odd. Maybe yours is still using the old J1850 standard. Try that.

[@jakov175]

@@Mazda626GF So I've checked again, and my diagnostic connector does not have the "TEN" or K Line PIN, and I've been unable to establish communication on the J1850 protocol, I connected the + and - of the protocol pins and the the power to the reader but the reader stays unresponsive, does not even start up so I'm not sure what's up with that. I wonder if it requires pulling up or down additional pins to force it to boot up. 12V is present on the power pin.

[@Mazda626GF]

Interesting. Is the ECU/PCM Ford EEC-V? If so, the TEN on the diagnostics port should be pin 5 on the PCM (brown with black cable) and MEN should be pin 79 on the PCM (yellow with black cable). TEN can be used to enter the really old school LED diagnostics mode, as well as adjusting the base idle, while MEN is the K-Line.