Wiring Harness
02-23-2004, 10:23 AM
#1
Senior Member
Thread Starter
Join Date: Feb 2002
Location: Frederick MD
Posts: 6,331
I know... another thread. Don't hate me, but I put the SAME one on the club as there are still some very helpful guys there... 
I figured I'd start from the beginning, to try to dig up all the help I can get on this goddamn harness..
I’m looking to see if anyone may know where I should start looking for problems in my harness.. I recently reinstalled my motor with a single and removal of nearly everything.. I had some trouble with my primary injectors not firing, and got lucky and made them work. I’m NOT satisfied that they are safe like this, or that they are even working right… so if you have any time, or experience with the wiring harness and primary injectors (Thanks already to clayne and those that helped me before) let me know if you have any ideas… I’ve dug through all the manuals and just can’t seem to find a relation between the wires, harness and function of the injectors..
Ok: Procedures went like this:
Tried to start car. Nothing.
Checked Spark = Good
Checked Fuel = Bad
Tested voltage to injector via testlight grounded to chassis = good
Tested injector function via 9V battery = good
Tried to start again = Nothing. No fuel still.
Went back to injector plugs after realizing that grounding injector to chassis didn’t tell me **** about the harness. Used test light on injector plug with neg side of plug as ground. With key on = nothing.
Decided to ground both injectors to chassis to determine if car will start aside from the f’d up harness = FLOODED.
With both injectors grounded to the same post, the car violently flooded. Removed ground..Decided to crank car with ground off (But both injector grounds still together) to try to unflood car = car fired RIGHT UP.
I’m lost now. To my understanding, what I have now going on is: 2 injectors using 1 driver to function.. Sound right? Why would tying the injector grounds together (while still connected to the harness) fire the car up? (I haven’t removed the t to see if it still fires though) If one injector ground was bad, I would still have initially been getting fuel from one injector, but I had NOTHING. If both were bad, then tying them together would have done nothing..
Sorry, no picture, but this should describe it. Both injectors (Primary) are still hooked to the harness. Both power and ground wires on both plugs on the harness remain INTACT. 1 wire is tied between the grounds (colored wires) on the harness. Kind of like a ‘H’ pipe on a Mustang..
If someone can help me determine where to look, and WHAT to look for it would be great! I redid the harness before installation, removing ONLY the sequential solenoids. Each individual wire is wrapped at the end and taped to the bulk of the harness. I triple checked it. Only one wire is broken… It’s a black wire with a red stripe and it goes on the back of the waterpump housing.. It’s the lower plug (There are 2) Other than that the harness is good aside from the wires I cut for the PFC which, by color, don’t match the injector wires in question.Sorry to confuse you if I did!
I figured I'd start from the beginning, to try to dig up all the help I can get on this goddamn harness..
I’m looking to see if anyone may know where I should start looking for problems in my harness.. I recently reinstalled my motor with a single and removal of nearly everything.. I had some trouble with my primary injectors not firing, and got lucky and made them work. I’m NOT satisfied that they are safe like this, or that they are even working right… so if you have any time, or experience with the wiring harness and primary injectors (Thanks already to clayne and those that helped me before) let me know if you have any ideas… I’ve dug through all the manuals and just can’t seem to find a relation between the wires, harness and function of the injectors..
Ok: Procedures went like this:
Tried to start car. Nothing.
Checked Spark = Good
Checked Fuel = Bad
Tested voltage to injector via testlight grounded to chassis = good
Tested injector function via 9V battery = good
Tried to start again = Nothing. No fuel still.
Went back to injector plugs after realizing that grounding injector to chassis didn’t tell me **** about the harness. Used test light on injector plug with neg side of plug as ground. With key on = nothing.
Decided to ground both injectors to chassis to determine if car will start aside from the f’d up harness = FLOODED.
With both injectors grounded to the same post, the car violently flooded. Removed ground..Decided to crank car with ground off (But both injector grounds still together) to try to unflood car = car fired RIGHT UP.
I’m lost now. To my understanding, what I have now going on is: 2 injectors using 1 driver to function.. Sound right? Why would tying the injector grounds together (while still connected to the harness) fire the car up? (I haven’t removed the t to see if it still fires though) If one injector ground was bad, I would still have initially been getting fuel from one injector, but I had NOTHING. If both were bad, then tying them together would have done nothing..
Sorry, no picture, but this should describe it. Both injectors (Primary) are still hooked to the harness. Both power and ground wires on both plugs on the harness remain INTACT. 1 wire is tied between the grounds (colored wires) on the harness. Kind of like a ‘H’ pipe on a Mustang..
If someone can help me determine where to look, and WHAT to look for it would be great! I redid the harness before installation, removing ONLY the sequential solenoids. Each individual wire is wrapped at the end and taped to the bulk of the harness. I triple checked it. Only one wire is broken… It’s a black wire with a red stripe and it goes on the back of the waterpump housing.. It’s the lower plug (There are 2) Other than that the harness is good aside from the wires I cut for the PFC which, by color, don’t match the injector wires in question.Sorry to confuse you if I did!
02-23-2004, 11:10 AM
#4
Senior Member
Join Date: Nov 2001
Location: NJ
Posts: 4,981
You are in the same boat I was in, then that same boat came and picked up Justin(93R1). Heat and age **** up the harness bad. After moving it all over to do the engine, they tend to crap out. We both got Jspec harnesses with low miles. The only problem with a jspec is, you have to repin one of the ecu connectors, becouse 1 jspec plug is different, that and you have to extend the coolant temp sensor wire about 8 inches.
I pulled my old harness apart, and never found the problem. I'm guessing that the copper wire is braking inside the insulation, and you'll never find that
I pulled my old harness apart, and never found the problem. I'm guessing that the copper wire is braking inside the insulation, and you'll never find that
02-23-2004, 11:16 AM
#5
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Thread Starter
Join Date: Feb 2002
Location: Frederick MD
Posts: 6,331
Originally Posted by 93 R1' date='Feb 23 2004, 11:01 AM
Out of curiousity did you solder in resistors for the secondary injectors? You sure you have the primaries hooked to the primary injector clips and not the secondary clips?
Just throwing out some ideas.
Just throwing out some ideas.
02-23-2004, 11:19 AM
#6
Senior Member
Thread Starter
Join Date: Feb 2002
Location: Frederick MD
Posts: 6,331
Originally Posted by turbovr6' date='Feb 23 2004, 11:10 AM
You are in the same boat I was in, then that same boat came and picked up Justin(93R1). Heat and age **** up the harness bad. After moving it all over to do the engine, they tend to crap out. We both got Jspec harnesses with low miles. The only problem with a jspec is, you have to repin one of the ecu connectors, becouse 1 jspec plug is different, that and you have to extend the coolant temp sensor wire about 8 inches.
I pulled my old harness apart, and never found the problem. I'm guessing that the copper wire is braking inside the insulation, and you'll never find that
I pulled my old harness apart, and never found the problem. I'm guessing that the copper wire is braking inside the insulation, and you'll never find that
I guess you are probably right.. It's just a really strange thing and I figured I may have just missed something somewhere.. I'm looking for a harness.. This really eats *****. Although the car DOES run!
02-23-2004, 03:26 PM
#10
Senior Member
Join Date: Nov 2001
Location: NJ
Posts: 4,981
well before you go and buy a harness, double, triple check everything. If all you connections are right, then I would bet it's the harness.
You said you had to join all the injector grounds together right?
That sounds like only 1 injector ground wire is working, if that is the case, I'll bet the harness is shot
You said you had to join all the injector grounds together right?
That sounds like only 1 injector ground wire is working, if that is the case, I'll bet the harness is shot