The Bitter End
Thread Starter
The Good Twin
Joined: Aug 2005
Posts: 20,639
From: Wild Wild West, UTAH!
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.
Registered User
Joined: 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.
Mr. Fancy Connectors
Joined: Nov 2007
Posts: 648
From: Boise, Idaho
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.
Thread Starter
The Good Twin
Joined: Aug 2005
Posts: 20,639
From: Wild Wild West, UTAH!
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.
Externally Wastegated
Joined: Oct 2001
Posts: 1,220
From: San Diego
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.
This facepalm's for you!
Joined: Aug 2008
Posts: 1,175
From: The Interwebs
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.
Externally Wastegated
Joined: Oct 2001
Posts: 1,220
From: San Diego
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.
Thread Starter
The Good Twin
Joined: Aug 2005
Posts: 20,639
From: Wild Wild West, UTAH!
Registered User
Joined: Mar 2006
Posts: 271
From: florida
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.
