The Bitter End
07-23-2009, 06:54 PM
#151
I have actually been thinking that. Some of the Z31 ecu code websites say some codes stay in the ecu. I don't know for how long, but I do disconnect the battery before every diagnostic run. And since I haven't been driving it lately, I keep it disconnected while it's parked.
As of now, the only issue is the hard start.
As of now, the only issue is the hard start.
07-23-2009, 07:26 PM
#152
Registered User
Join Date: Jul 2009
Posts: 341
I have actually been thinking that. Some of the Z31 ecu code websites say some codes stay in the ecu. I don't know for how long, but I do disconnect the battery before every diagnostic run. And since I haven't been driving it lately, I keep it disconnected while it's parked.
As of now, the only issue is the hard start.
As of now, the only issue is the hard start.
07-24-2009, 12:10 AM
#153
Mr. Fancy Connectors
Join Date: Nov 2007
Location: Boise, Idaho
Posts: 648
Hum... what bike is it again?
Today I swapped the lowest ecu connector w/ one from an 87 Z31. The ground pins were toast, and looking at the schematic, those are the grounds for most of the sensors.
Well, that fixed the rough idle (idles like a freaking champ), but it's still got the hard start, and the same ecu codes are being displayed.
Today I swapped the lowest ecu connector w/ one from an 87 Z31. The ground pins were toast, and looking at the schematic, those are the grounds for most of the sensors.
Well, that fixed the rough idle (idles like a freaking champ), but it's still got the hard start, and the same ecu codes are being displayed.
08-27-2009, 09:44 PM
#154
And the Z is back to life again. Runs great. Still running 8psi boost as the motor has about 470mi on it (I try not to boost...).
Pic of the new Z31 ecu plug (I suggest all 280ZXT owners chop and replace it asap), and updated pic of my engine bay.
Pic of the new Z31 ecu plug (I suggest all 280ZXT owners chop and replace it asap), and updated pic of my engine bay.
08-27-2009, 11:43 PM
#158
Externally Wastegated
Join Date: Oct 2001
Location: San Diego
Posts: 1,220
For your code 23, my friend and I had something similar on his 240sx. We extended the ground wire of the tps and grounded it to the chassis as well. Same with the ground for the MAF wire. It made a world of difference in how his car idled. (no more lopes during cold start or stop and go traffic now) Maybe it can help you out as well. Nissans have notoriously crappy ground wires.
09-06-2009, 12:37 PM
#161
This facepalm's for you!
Join Date: Aug 2008
Location: The Interwebs
Posts: 1,175
soooo... want to re-read that statement and tell me all the flaws in it?
no?
ok well first off, WTF is a speed barrier? and how would gas be free then? that in no way relates to back to the future, and u spelled future furure which sound more like a typo of someone saying ruler in German than an English word. lol.
no?
ok well first off, WTF is a speed barrier? and how would gas be free then? that in no way relates to back to the future, and u spelled future furure which sound more like a typo of someone saying ruler in German than an English word. lol.
09-06-2009, 03:20 PM
#162
Externally Wastegated
Join Date: Oct 2001
Location: San Diego
Posts: 1,220
Sorry, I was assuming you were using a 240sx tps with your z31 setup. The MAF ground wire, we used bigger gauge wiring for it and grounded it directly to the chassis.
09-07-2009, 09:21 AM
#163
05-22-2010, 09:13 AM
#164
Registered User
Join Date: Mar 2006
Location: florida
Posts: 271
I cut up my 280zx tps and just kept the flat mounting surface.
Then I tack welded the 240sx tps (actually M30 but same part number) right onto it since the throttle plate shaft is plenty long enough.
Been working great with a M30 sequential ecu for the last 20,000 miles.
Then I tack welded the 240sx tps (actually M30 but same part number) right onto it since the throttle plate shaft is plenty long enough.
Been working great with a M30 sequential ecu for the last 20,000 miles.
