View Full Version : S13 SR20DE Won't Rev Past ~3500 RPM

04-04-2020, 12:56 PM
First post to Zilvia, although I've used the forum itself a lot, but anyways...

I have a late model S13 SR20DE, that's right, DE, and it's bone stock besides the Wiring Specialties harness that I got for it. The motor is in a '86 200SX S12. I have an issue with the motor sounding like it's bouncing off rev limiter at roughly 3500 RPM, and at first, I thought it was a MAF issue, but after switching through 3 different MAF's, I'm starting to doubt that's the problem. I thought then maybe it was my TPS, I had a brand new OE one in the box, so I slapped it one there, adjusted it to correct voltage, and still the same issue. With it being a 'V6' SR ECU, I'm really not sure if these flash codes or not like the DET's do. There's not a crazy amount of info on the motors for me to dig into.

So, any input from you guys???

04-06-2020, 07:05 PM
I had the same issue when i had KA24. I couldn't rev past like 3000-3500rpm and it would bounce off the limiter an shake violently. I replaced MAF and TPS and i had 0 success, but changing the knock sensor did the trick.

04-06-2020, 08:29 PM
You should be able to pull codes off of the ECU just like the turbocharged variant.


The S14 FSM should cover pretty much anything mechanical on your engine. It's the same just no turbo.

as far as wiring goes for the chassis, https://www.nicoclub.com/service-manual?fsm=200sx/1986/1986-s12_manual.pdf should take care of it.

04-08-2020, 07:50 PM
You should be able to pull codes off of the ECU just like the turbocharged variant.

That's the thing, this 'V6' DE ECU, doesn't have the option to turn a screw and read diagnostic codes right off of the flashing LED. And the S12 Chassis doesn't have a 'Check Engine' light on the dash at all 😂 now, the WS harness does have a Consult port on it, but don't you have to have a datascan tool and the program to read the codes that way?

04-08-2020, 09:35 PM
Like this one?


That's a tough one... maybe start troubleshooting basic issues.

knock sensor would be a good place to start like Taisan said. check the mini harness to it to make sure it isnt damaged.

check/adjust your TPS

good luck...

05-03-2020, 03:53 AM
S13 SR20DE should have ECU #60 (Manual trans.) or #61 (Automatic trans.)

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07-01-2020, 10:37 AM
So I have Nissan Consult I on my laptop for this ECU, because it is the 'V6' one. Not the '60' or '61'. It did end up being a MAF issue that was going in and out intermittently, which is really odd. Never heard of that before, so I got a new MAF. But I'm afraid that didn't completely solve my issues. I can now rev past the 3500rom mark, but now the car is running completely lean. So I'm guessing maybe either unmetered air is getting in somewhere (which I still haven't been able to find a place where it could be leaking in from), or I may be having an IACV issue possibly.

If you guys have anymore input on that subject, let me know please