Question for Cruiser54 on Renix ECU Upgrade

CJR · Jan 29, 2018

In you Renix ECU upgrade video, two Renix ECUs are shown; i.e. 428 & 429. In the replies to that video, it's stated that the ECU 428 was used because the XJ used was an automatic. Is that correct? So then the Renix ECU 429 can only be used for stick-shifts?

Best regards,

CJR

cruiser54 · Jan 29, 2018

CJR said:
In you Renix ECU upgrade video, two Renix ECUs are shown; i.e. 428 & 429. In the replies to that video, it's stated that the ECU 428 was used because the XJ used was an automatic. Is that correct? So then the Renix ECU 429 can only be used for stick-shifts?

Best regards,

CJR

You can use them in either application. The 428 will work just fine with your stick shift.

CJR · Jan 29, 2018

Cruiser54,

I have an 88 XJ auto Renix. What exactly is the difference between the 428 and 429 Renix ECUs?

Best regards,

CJR

cruiser54 · Jan 29, 2018

CJR said:
Cruiser54,

I have an 88 XJ auto Renix. What exactly is the difference between the 428 and 429 Renix ECUs?

Best regards,

CJR

Don't know EXACTLY, but it seems like the Auto ECUs have a teeny bit better idle stability when shifting from Park or Neutral into D or R.

CJR · Jan 29, 2018

Cruiser54,

Thanks for your response. It is appreciated! I started incorporating many of your tips into my 88XJ years ago. It now runs really, really well and is my most reliable Jeep!
Keep up the good work.

Best regards,
CJR

cruiser54 · Jan 29, 2018

Thanks for the kind words. Enjoy your Renix!!

BTW, snag every 428 and 429 ECU you can!!

lawsoncl · Jan 31, 2018

cruiser54 said:
Don't know EXACTLY, but it seems like the Auto ECUs have a teeny bit better idle stability when shifting from Park or Neutral into D or R.

I can't imagine the difference is too big. The ECU doesn't control the trans or even know what gear you're in. Doesn't have any data connection at all. The manual ECU does have an output in the connector for an upshift lite though.

cruiser54 · Jan 31, 2018

lawsoncl said:
I can't imagine the difference is too big. The ECU doesn't control the trans or even know what gear you're in. Doesn't have any data connection at all. The manual ECU does have an output in the connector for an upshift lite though.

I couldn't really tell much difference except the idle stability.

Question for Cruiser54 on Renix ECU Upgrade

CJR

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cruiser54

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CJR

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cruiser54

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CJR

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cruiser54

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lawsoncl

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cruiser54

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