My 91 started to stumble a little, especially off idle...then clears up under acceleration. Then it ultimately shows a Check Engine Light...and purrs (roars)???
Stumble...rough...CEL...smooth?
- Thread starter TomCat
- Start date
Check Codes, change faulty 02 sensor (s)
HTH,
LarryB
HTH,
LarryB
When the CEL comes on the engine "fixes itself". Are the O2 sensors "out of the loop"
when CEL is on?
I tried to follow the DIY check codes but I did NOT find: " You are looking for a two pin connector. The plastic connector itself is bright blue.". In my 1991 NSX, I found a pink connector (unattached to anything) with six (6) wires running to it. Pictures attached.
Is this "it"? Where do I jumper?
Attachments
If you notice the tag on the wires with this pink connector has the letters, "ALB" this is the connector for cycling the Anti Lock Brake circuits. Not the one you are looking for. The one you are looking for only has two wires.
Brad
But I'm in the right area??? under the dash, passenger side
Found it...shorted it, TCS light blinks!
As soon as I turn the key, I "think" I get 3 long/3 short flashes. But from then, leaving the ignition on, I get 4 long and 3 short repeated.
I do not see anything in the DIY section that refers to either 3/3 or 4/3 flashes?
I've got the same problem at present. O2 sensor data seems to be ignored once the CEL is on, default fuel map settings are used instead.
I think this code is "front O2 sensor / front fuel supply system".
The codes are listed on page 196 of the PDF service manual, and information relating to code 43 & 44 are on page 212.
PDF service manual available for download at
http://www.nsxprime.com/wiki/Service_manuals
I think this code is "front O2 sensor / front fuel supply system".
The codes are listed on page 196 of the PDF service manual, and information relating to code 43 & 44 are on page 212.
PDF service manual available for download at
http://www.nsxprime.com/wiki/Service_manuals
If the TCS light is sending a code it will most likely be a 41-42-44-48
These are codes for the Wheel speed sensors. Please check it again.
Typically if you are having throttle hesitation it will be a rear wheel speed sensor, 44 or 48.
LMK,
LarryB
These are codes for the Wheel speed sensors. Please check it again.
Typically if you are having throttle hesitation it will be a rear wheel speed sensor, 44 or 48.
LMK,
LarryB
Sorry CEL blinking 4 long 3 short...repeating
I've got two O2 sensors on order but the write up (without any pictures) of the header change to include O2s (DIY section) is intimidating!
I couldn't find it in the repair manual.
Any suggestions?
O2s (from NTK/NGK) fixed it! Custom headers confounded the job!
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