Old style injector trouble- Please need some advise! - ZDriver.com

Go Back  ZDriver.com > Cars > 300ZX (Z32) Forums
Old style injector trouble- Please need some advise! >

Old style injector trouble- Please need some advise!

300ZX (Z32) Forums Dedicated to 90-96 ZCars otherwize known as the Z32's

Old style injector trouble- Please need some advise!

Old 06-01-2018, 11:23 AM
  #1  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 1
Old style injector trouble- Please need some advise!

I have a 1991 NA with old style injectors. I do have a paper copy of the factory service manual. I had a rough idle condition and when testing it revealed cylinder #4 showing no injection. Coil was within resistance specs, spark plug new, and the injector has no "click" when turning the CAS. I hear clicks on all other cylinders. Using a logic probe, I checked the #4 connector and, when disconnected from the injector, I have one pole with constant power and the other no power except when I rotate the CAS and hear clicks on the remaining injectors. I do get a momentary light on that one pole when turning the CAS. I believe this tells me the signal from the computer is good? When I compare this behavior to cylinder #2 injector connector the behavior of cylinder #4 connector is the same. Once I plug in an injector (or 2 other test injectors that all show ohms within spec) and when back probing the connector I get both poles showing power and while rotating the CAS I get no click.

I am pretty confident someone on this forum can help me figure out why this is occurring !

Thanks in advance! I am new to this group and very much look forward to good things from this car. Once I get the car running better, I plan on replacing all the old style injectors with a brand new system but removal of the plenum is daunting at this point.

Grant
Gooldg is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
dennys93na300z
300ZX (Z32) Forums
3
10-15-2014 11:05 PM
Lovenpain
For Sale (VIEW ALL)
0
02-26-2012 01:35 AM
silverz32
300ZX (Z32) Forums
0
02-25-2012 09:23 AM
KasbeKZ
FS: 300ZX (90-96)
0
04-04-2010 07:36 PM


Thread Tools
Search this Thread
Quick Reply: Old style injector trouble- Please need some advise!


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 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.