2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

New rebuild, injectors not firing s4

Thread Tools
 
Search this Thread
 
Old Sep 17, 2006 | 05:15 PM
  #1  
hornbm's Avatar
Thread Starter
FD > FB > FC
Tenured Member: 20 Years
 
Joined: Oct 2002
Posts: 3,873
Likes: 3
From: Bothell, WA
New rebuild, injectors not firing s4

OK I recently rebuilt my TII myspelf. Motor has GREAT compression. However the thing will NOT start! I figured out, that ive got spark, and I checked and the fuel pump is running, which means the Computer is working since its getting the signal from the AFM.

Anyway, so i pulled the spark plugs out and cranked it over and NO FUEL! interesting. Now during the rebuild, I installed NEW injector clips, and I removed all emissions.

Anyway so my concerns are as follows. I know of nowhere where I can get a conline copy of the wiring diagram, that contains the injector wiring for the car WITH the resistor pack Could anybody point me in the right direction?

Also can anybody tell me what resistance I should be seeing between the ECU pin for the injectors and ground?
Reply
Old Sep 17, 2006 | 05:40 PM
  #2  
alwayssideways's Avatar
Nurse I need 1300cc's NOW
Tenured Member 05 Years
 
Joined: Dec 2003
Posts: 1,261
Likes: 1
From: Hartford
have you made sure you have all the connections under the dash connected?? I did what you did and wasnt getting fuel. It ended up being that I forgot to plug in a part of the wiring harness that actually didnt connect to the Ecu but instead to something mounted under the dash. One of the big semi clear orange harnesses
Reply
Old Sep 17, 2006 | 05:57 PM
  #3  
importsown's Avatar
Addicted to speed
Tenured Member 05 Years
 
Joined: Jun 2006
Posts: 158
Likes: 0
From: Kelowna BC
Did you hold the injectors against the intake manifold while you were testing them? They may not be getting grounded well enough from the harness. This is rather moot though because they if they are not firing because of bad grounds it is either the main harness ground or the extra, thin gauge, ground running from the UIM to the middle-ish of the firewall, one or both are either not hooked up or corroded badly. Make sure you check these. And just for ***** and giggles, have a friend hold a somewhat heavy gauge wire on the negative terminal on the battery to somewhere on the block (somewhere safe for his arm) or just hook it up to a bolt as a temporary measure, just to see if this is the problem.
Reply
Old Sep 17, 2006 | 06:19 PM
  #4  
eddierotary's Avatar
back with rotaries
Tenured Member 20 Years
iTrader: (7)
 
Joined: Nov 2001
Posts: 2,239
Likes: 1
From: Watertown, NY
i think you probably miss a ground somewere. check the ground on top of the engine make sure they are good and make sure you have a good ground from the engine to the chassis too
Reply
Old Sep 17, 2006 | 07:11 PM
  #5  
calrx7's Avatar
aim** JI II IM IM Y
Tenured Member 05 Years
 
Joined: May 2005
Posts: 495
Likes: 0
From: 90703 cerritos california
o man, ground is a bitch. i incorrectly grounded one of mine and i cant read the oil pressure!
Reply
Old Sep 17, 2006 | 11:43 PM
  #6  
Kai's Avatar
Kai
Rotorphile.
Tenured Member 05 Years
 
Joined: Mar 2002
Posts: 1,296
Likes: 0
From: Richmond/NoVA
My '7 just suffered from a failed resistor pack. Each resistor is marked at 6 ohms, mine measured in at 5.2 ohms each except for the failed one (infinate.) I would think that adding 5-6ohms over the normal resistance would be the norm for 86-87.5 cars.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
SCinfidel
3rd Generation Specific (1993-2002)
4
Sep 8, 2015 05:36 PM
rotor_veux
2nd Generation Specific (1986-1992)
5
Sep 3, 2015 07:10 PM




All times are GMT -5. The time now is 06:56 AM.