New exhaust, engine cuts out at 7k RPM

[ecadwell]

Well, guys, I have my new NSX, and I just had a custom Flowmaster setup installed tonight with 2.5" mandrel-bent pipes. However, after getting it made and put on, the engine will now cut out at 7,000 RPM on acceleration. It sounds somewhat like a rev limiter, but even more drastic. The engine just flat cuts out. I had no problems yesterday revving all the way to 8,000 with the stock exhaust.

My car is a '91 with 39k miles. I still have the original cats on the car, which I assume to be in good shape.

My brother thinks it may be a fuel filter, since I am getting better flow now, and it needs more fuel, so may be starved there.

I haven't tried anything yet, but thought I'd post here to see if anyone else has had problems with this or had ideas.

Thanks in advance for the help.

 

[ScienceofSpeed]

What year is the car?

Have you checked the ECU codes?

regards,
-- Chris

 

[ecadwell]

The car is a '91.

I performed the DIY ecu code check found in the FAQ. At least I THINK I did it correctly. I assume there is only one bright blue 2-pin plug under there. I did not receive any error codes.

 

[Briank]

You need to check engine temp sensor and wiring to it. The ecu will limit the engine to 7000 rpm if it thinks the engine is not warm enough.

 

[ecadwell]

That's a great thought. Where do I find that? Is there a FAQ on that?

 

[Briank]

http://www.nsxprime.com/FAQ/Reference/1991_svcman/1991_svcman.htm
page 224 of 1420

 

[ecadwell]

Yes! That fixed the problem. Thanks so much for the help, BrianK! Now, on to driving!