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rwiggins951

Quick Red ECM question-EGR Disabling

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Anyone know if the EGR functions are fully disabled when using the RED ECU? Asked another way, anyone using a RED ECM that does not have EGR at all?

I have a US-spec 98 Esprit. I am using the factory RED ECU. I have the plenum off to replace a sticky Idle valve and I noticed that the EGR pipe is cracked. This may be associated with the reason the my last IAC valve annoyingly only lasted a year. I would really like to remove the EGR system altogether. I understand that the early UK cars did not have EGR at all and the non-US cars show a small plug inserted in the EGR manifold that would appear to effectively disable the system. My concern is that I do not want to end up throwing a code if I remove the EGR pipe and plug both ports.

I assume the 'race only' and non US-specific nature of the Red ECM would dispense with such things as EGR in the same way it ignores the post-cat O2 sensors.

Can anyone confirm this?

Many thanks!


Rod

98 Esprit V8

Dynamic Racing Turbos

Water Injection

Factory Red ECU

3 bar MAP piggyback

Straight-through exhaust

TurboXS BOVs

Blitz I-color boost control + Wide-band AFR

Porsche/Getrag G50/52 Transmission (...coming soon someday)

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I ran the Lotus Red ECU on a UK non-EGR engine during a dyno session some years ago and it developed no EGR related codes.

Confirmed a few other things :) but no codes.

I would remove the EGR related parts - maybe even going as far as to blank off the LH exhaust manifold port as well.

Cheers,

Mike S

Edited by mike_sekinger

1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Rod,

If you decide that you are keeping your EGR system and need a new and better pipe design then PNM Engineering make thicker walled stainless steel EGR pipes. The OEM ones are so thin that they are a common problem for failure.

Regards,

David Walters

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I ran the Lotus Red ECU on a UK non-EGR engine during a dyno session some years ago and it developed no EGR related codes.

Hi Mike,

Any idea how the Lotus red ECU compares with the PUK & Johan's ECU?

Regards,

Peter.

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Sorry - I never ran either the PUK or the Johan chipsets, so I can


1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Hi,

the Lotus Red ECU (that was sold in Europe) does not support the EGR and also does not support the Air Injection System. Therfore you donot need all this (useless) stuff around your engine. Just remove it end blank the ports.

Cheers

Marcus

www.PUKesprit.de


Marcus

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On that note.. will removing the air pump and egr set a code on the factory ecm then? (obviously if I disconnect the actual pump wiring it will.. but if the system simply blows air to atmosphere.. can the ecm pick this up?)


Modifying esprit's.. now that's fun..

PS... I AM NOT A CERTIFIED MECHANIC.. I Have chosen to help those in need, in the past and must not be construed as being a certified technician.

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Hi Mike,

Any idea how the Lotus red ECU compares with the PUK & Johan's ECU?

Regards,

Peter.

I had Johan's setup prior to the factory red. I must say Johan's felt a bit better for low-end torque and throttle response. A/F ratios are very similar at full boost. I thought that Johan had copied the factory map, so I may have been imagining the additional 'snappiness' in his chip. I did not do any dyno comparison. I had fried my Johan-modded ecu when I charged the battery and needed a new ECM anyway. Decided to just buy the factory red and be done with it. It was only a few dollars more.

Thanks for all the feedback on the EGR question. Can't wait to remove the whole lot! From the manifold on out. I have to wonder what sort of EGR flow the red ECU was actually managing through the EGR stepper motor on a US-spec car. I have to imaging EGR flow along with hot exhaust gasses under the plenum contributed significantly to the sticky IAC valve. It always stopped working after a hard pass.

Regards,


Rod

98 Esprit V8

Dynamic Racing Turbos

Water Injection

Factory Red ECU

3 bar MAP piggyback

Straight-through exhaust

TurboXS BOVs

Blitz I-color boost control + Wide-band AFR

Porsche/Getrag G50/52 Transmission (...coming soon someday)

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