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El Chingon
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892 Posts
Discussion Starter #1
Hey everyone, I'm just wondering if there's anyone out there with the instructions from JWT on how to wire the 95-97 JWT ECU to work in the 98+ cars. Ben, Naji, and Mike.. you've done it before.. still got those instructions lying around somewhere? I hear there's some modifications necessary to the emissions equipment..?? Any info anyone could provide with this would be greatly appreciated!!!! TIA!!!

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David
'98 Super Black SE w/stuff
 

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SR20 Enthusiast
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480 Posts
i got the instructions, if you need them i can fax them. or email them to you . let me know.

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98 200SX SE-R, CAI, AEBS Header, Greedy Exhaust, JWT Motor Mounts, Pullies, Nismo fuel press.reg, JWT C1 cams and JWT gears, Valve Springs and Titanium Retainers, ACT HD/PP, Clutchmasters Flywheel, JWT Computer,Bored Airflow Meter.
 

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El Chingon
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892 Posts
Discussion Starter #4
Yea!! That would be great!!!! E-mail would probably work better for me, but either will be fine. [email protected] or (480) 699-4846 Thanks!!!!

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David
'98 Super Black SE w/stuff



[This message has been edited by nsracer (edited 07-31-2001).]
 

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www.motorists.org
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3,047 Posts
From the SE-R list archives:

I just received a couple e-mails about this topic in the past hour or so. I
will probably receive more, so instead of e-mailing privately I'll just
e-mail to the list.

If you order a turbo kit (F-Max, Hotshot) for a 98, you'll receive a 95-97
reprogrammed ECU from JWT. The 95-97 ECU will work, but (as previously
mentioned) you must do some minor re-wiring. My F-Max kit did not come with
the re-wiring directions. I had to call Clark from JWT. I must thank Clark
publicly for taking the time to explain the changes in the ECU, and also for
faxing me the re-wiring directions. Thanks. The following is what Clark
sent me:

Installing 95-97 ECU into 98 loom on 1998 200SX SE-R.

1) At the ECU plug, cut and tape Evap. vent sol. wire at pin 108 and move
the rear O2 heater wire from pin 110 to pin 108 at the ECU.

2) Replace EGR sol. valve with one from 95-97 SE-R.

3) At the ECU plug, remove wires from pins 28 & 63 and cross over (i.e.
wire 28 to pin 63 and wire 63 to pin 28). These are the air and fuel temp
wires.

4) Replace the rear O2 sensor with a 95-97 type. Adapt 18mm hole in CAT.
for a 12 mm thread on new sensor. Adapt wiring for new O2 sensor. Remove
O2 sensor wires from old 4-wire plug. Remove center wire from new sensor
and install it in the 4-wire plug so it matches the white wire on the ECU
side of plug. Next take the other 2 wires from the sensor (heater) and
install them into the 4-wire plug so that one wire matches with the
red/yellow and the other with the brown/yellow. this will leave one blank
pin at the black wire.

Don't ask me about the emissions wiring as I didn't bother with any of them.
Clark said that they would not affect performance and the car would run
fine without them. I assumed that JWT would have the 98 ECU ready in a
matter of months. Therefore, I didn't want to go through the entire process
in reverse when I eventually traded the 97 ECU for a 98.

The car runs perfectly fine. I'm probably getting a little worse gas
mileage than I would normally have because my emissions is not hooked up. I
like the improvement in throttle response, and the elimination of the 7100
fuel cut & 109 mph limiter. I just had to test the latter of the three out.
I can say that 130+ mph in an SE-R feels pretty good. Much more stable
than my friend's CRX at 120+ mph.

Please no flames for the speed thing. It was at 1 a.m. on a flat, straight
road in the middle of nowhere.

If anyone has more questions, just e-mail me.

Bran
[email protected]


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Ben98SentraSE
98 Sentra SE TURBO and crashed 93 NX2000


[This message has been edited by Ben98SentraSE (edited 08-01-2001).]
 

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3,047 Posts
You don't have to replace the EGR solenoid valve. If you don't care about EGR functionality just ask JWT to put a resistor in the ECU to "program out" the EGR so you won't throw a code. Worked great for me.
 

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El Chingon
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892 Posts
Discussion Starter #7
Cool! How'd you find that Ben? I searched and only got a couple of your posts, but not this one.. Well, that's cool, my ECU has the EGR and rear O2 eliminated already, so I don't have to worry about changing those


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David
'98 Super Black SE w/stuff
 

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Track Whore
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