Hello Prime Members,
Yesterday was a bad day for my ’93 NSX.
About 2 years ago, in anticipation of adding a supercharger someday, I installed an AEM ECU, Wideband UEGO with Bosch 02 sensors , AEM air sensor kit, 3.5 bar map sensor, and 725 cc balanced injector dynamics injectors. My N/A beauty already had a CT air box, SOS cams and throttle body, CT headers and the sweet GT-1 exhaust from Umbrella. The car was tuned and made an impressive 278 rwhp N/A.
About a year ago I had a top local shop (Acura of Lynwood) install a 1.7 liter CT Supercharger, Laminova intercooler (SOS) and updated lost motion assembly (also from SOS).
I am certain that all the suppliers and installed parts were of top quality.
After setting this project aside for another 12 months I finally found a tuner that I had confidence in and set up the appointment.
Well…..yesterday after spending many hours carefully building and perfecting the various tuning maps on his laptop and on the Dyno, my motor failed on a final run. It had just cooled off from a 374 rwhp run and was performing perfectly (and sounding amazing).
I am no expert on this but the tuner is saying that an 02 sensor flat lined and sent the wrong information to the ECU which led to a lean out @ WOT….=….motor failure.
After removing the plugs, we found 3 “affected” cylinders. The motor will have to come out and rebuilt or my pristine garage queen will be a display piece only.
In your collective experience, is 02 sensor failure the likely scenario to cause this, or is it something else?
I guess that this question may lead to other questions…..but I just needed to share with someone who may care, my brothers on Prime.
Short of shipping the car to Acura of Lynwood, can anyone recommend an independent shop is Seattle area to (carefully) drop the motor so I can get it rebuilt?
I have had excellent experience with SOS, so I may opt for their forced induction rebuild, but right now my head is still spinning and the thought of blowing another motor due to sensor failure gets me in PTSD.
Thanks for reading/commenting on this.
Brian P.
Yesterday was a bad day for my ’93 NSX.
About 2 years ago, in anticipation of adding a supercharger someday, I installed an AEM ECU, Wideband UEGO with Bosch 02 sensors , AEM air sensor kit, 3.5 bar map sensor, and 725 cc balanced injector dynamics injectors. My N/A beauty already had a CT air box, SOS cams and throttle body, CT headers and the sweet GT-1 exhaust from Umbrella. The car was tuned and made an impressive 278 rwhp N/A.
About a year ago I had a top local shop (Acura of Lynwood) install a 1.7 liter CT Supercharger, Laminova intercooler (SOS) and updated lost motion assembly (also from SOS).
I am certain that all the suppliers and installed parts were of top quality.
After setting this project aside for another 12 months I finally found a tuner that I had confidence in and set up the appointment.
Well…..yesterday after spending many hours carefully building and perfecting the various tuning maps on his laptop and on the Dyno, my motor failed on a final run. It had just cooled off from a 374 rwhp run and was performing perfectly (and sounding amazing).
I am no expert on this but the tuner is saying that an 02 sensor flat lined and sent the wrong information to the ECU which led to a lean out @ WOT….=….motor failure.
After removing the plugs, we found 3 “affected” cylinders. The motor will have to come out and rebuilt or my pristine garage queen will be a display piece only.
In your collective experience, is 02 sensor failure the likely scenario to cause this, or is it something else?
I guess that this question may lead to other questions…..but I just needed to share with someone who may care, my brothers on Prime.
Short of shipping the car to Acura of Lynwood, can anyone recommend an independent shop is Seattle area to (carefully) drop the motor so I can get it rebuilt?
I have had excellent experience with SOS, so I may opt for their forced induction rebuild, but right now my head is still spinning and the thought of blowing another motor due to sensor failure gets me in PTSD.
Thanks for reading/commenting on this.
Brian P.