General 1967-2002 F-Body Tech For general F-Body discussion that does not fit in any other forum.
For F-Body Technical/Information Discussion ONLY

93 Z28 injector bank right and left error

Old 06-10-2019, 08:59 AM
  #1  
Registered User
Thread Starter
 
Join Date: Jun 2019
Posts: 4
93 Z28 injector bank right and left error

Hey guys , picked up a 93 a couple months ago. Iíve installed pacesetter long tubes , MSD opti , MSD wires , NGK plugs, nitrous outlet 100 shot plate kit, new 02 sensors and tuned by soloman @ LT1pcmtuning.com. Car runs amazing . We are still in the process of getting tuning dialed in. Over the weekend running some data logs noticed that injector bank right and left are still showing error. The car runs amazing and I need to get these errors cleared before moving forward with dialing in tuning and spraying. Any help would
be greatly appreciated.
SRT_ZAC is offline  
Old 06-10-2019, 11:38 AM
  #2  
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,230
Re: 93 Z28 injector bank right and left error

What software are you using for the data logs?
Injuneer is offline  
Old 06-10-2019, 11:40 AM
  #3  
Registered User
Thread Starter
 
Join Date: Jun 2019
Posts: 4
Re: 93 Z28 injector bank right and left error

Tuner Pro RT.
SRT_ZAC is offline  
Old 06-10-2019, 02:02 PM
  #4  
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,230
Re: 93 Z28 injector bank right and left error

OK.... I'm not familiar with that software. Looked at 100's of logs from Scan9495 and Datamaster. Also been given eeHack logs recently, but they are just too unwieldy.

Since 93, unlike the later 94/95 OBD-1 cars, doesn't have DTC 18 for the injector circuits, what fields indicate the “error” on both left and right banks? In Scan9495 (which also works on 93), in addition to the DTC log for each record, there is another column for “injector fault occurred”.

Generally, the diagnostic looks at the voltage on each circuit, and sets codes for low or high voltage outside normal limits. Since it's running great, not likely you are missing the direct 12 volt side. That would leave something like an intermittent ground from the ECM, but that would likely be felt as misfires. Last possibility might be incorrect resistance on one or more injectors in each bank. Have you checked the resistance across the two pins on the injectors ?
Injuneer is offline  
Old 06-10-2019, 03:09 PM
  #5  
Registered User
Thread Starter
 
Join Date: Jun 2019
Posts: 4
Re: 93 Z28 injector bank right and left error

Under flags , injector 1 & 2 banks continuously show errors. Injector bank driver bank 1 intermittently flashed on off. The service engine light however never is set. I just downloaded Scan9495 and will try it out later today. I have not checked resistance on injector coils as of yet, thatís probably a good starting point. What should they read??
SRT_ZAC is offline  
Old 06-11-2019, 10:30 AM
  #6  
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,230
Re: 93 Z28 injector bank right and left error

I can't find the values in the 93 factory manual, but it does indicate there are flags for left and right bank faults. I know on my 94, the fault (DTC 18) will set if the resistance of the injector is less than 11.6 ohms. Typical acceptable range for the Multec injectors is 11.6 to ~16 ohms.
Injuneer is offline  
Old 06-11-2019, 11:45 AM
  #7  
Registered User
Thread Starter
 
Join Date: Jun 2019
Posts: 4
Re: 93 Z28 injector bank right and left error

I checked resistance last night.. they were pretty consistent, all reading between 13.5-13.6.
SRT_ZAC is offline  
Old 06-11-2019, 01:12 PM
  #8  
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,230
Re: 93 Z28 injector bank right and left error

Sounds good. It would be odd to have an individual injector problem on both banks. And if you had a problem with the 12 volts or ECM driver ground to a bank, you would definitely feel it.

Strange.
Injuneer is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
#2
F-body Lounge
33
10-01-2010 07:24 PM
brahm
Computer Diagnostics and Tuning
14
09-30-2008 03:40 PM
David94TA
Computer Diagnostics and Tuning
12
12-10-2007 07:31 AM
WhiteThunderZ28
LT1 Based Engine Tech
11
09-02-2006 06:02 AM
turbo_Z
Computer Diagnostics and Tuning
1
05-04-2004 11:03 PM


Thread Tools
Search this Thread
Quick Reply: 93 Z28 injector bank right and left error


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.