DTC with engine running?
#1
Junior Member
Thread Starter
Join Date: Aug 2018
Location: Lenoir NC
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
Car: 92 RS Heritage Edition
DTC with engine running?
I know typically you don't try and pull codes while the engine is running and even for live data you plug the scanner in before you start the car. That said, The previous owner of the vehicle apparently has wired ECU power to the ignition cylinder and I'm not exactly comfortable enough with wiring to go hunting for that little gremlin to undo it. So I'm wondering how dangerous it is to shove a paperclip in the OBD port with the engine running? Every time I turn off the engine to check the code it just clears the ECU. Opinions?
#2
Moderator
iTrader: (1)
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,401
Likes: 0
Received 215 Likes
on
201 Posts
Car: check
Engine: check
Transmission: check
Re: DTC with engine running?
Won't work, with a running engine the SES/CEL is used to indicate lean, rich, or open loop. Only at key-on, engine-off does the ECM blink the codes.
RBob.
RBob.
#3
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,051
Received 1,672 Likes
on
1,269 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: DTC with engine running?
Yup, sounds like it's time to find and undo the PO's "improvements".
#4
Junior Member
Thread Starter
Join Date: Aug 2018
Location: Lenoir NC
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
Car: 92 RS Heritage Edition
Re: DTC with engine running?
Yea something was telling me that's my only option. Not the only "improvement" that needs to be undone...like the T junction in the exhaust...but anyway thanks guys I appreciate it
Thread
Thread Starter
Forum
Replies
Last Post
25th327RS
LTX and LSX
23
02-17-2013 09:36 PM