Sub engine harness battery connector issue?
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Sub engine harness battery connector issue?
Hey guys Im nearly done with my jspec s4 T2-usdm s4 T2- swap and I had a couple questions about the sub harness and connectors. this is on my 87.
1st question- What purpose does this wire serve? looks like a major engine ground to me? where does it connect to? is this for the negative battery cable?
2nd Question- is this electronic component ok being mounted here?
right now when I connect my battery terminals I hear a pop from the ground or starter area like something is shorting and im getting no power inside the car.. hoping I havent damaged anything.
1st question- What purpose does this wire serve? looks like a major engine ground to me? where does it connect to? is this for the negative battery cable?
2nd Question- is this electronic component ok being mounted here?
right now when I connect my battery terminals I hear a pop from the ground or starter area like something is shorting and im getting no power inside the car.. hoping I havent damaged anything.
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Im also having trouble identifying which wire is positive on the battery cables ? theres a solid black and a black with yellow stripe, I thought negative was with black with yellow but im second guessing myself for some reason...
should the starter ground wire take care of my issue with no power to the car then?
Last edited by lucky87T2; 05-05-13 at 09:20 PM.
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The NEGATIVE wire is the one with the Yellow stripe.
That goes to the LONG starter bolt(that would be the Top bolt).Put the neg wire circular connector on that bolt,then feed the bolt through From the Engine side through the rear iron, the trans and starter and put the nut on.(it may have been on the other way but Trust me it is easier to get the starter on and off when the bolt is this way.PLUS you do not loose the Neg wire when you have to remove the starter,it stays on that bolt!)
That goes to the LONG starter bolt(that would be the Top bolt).Put the neg wire circular connector on that bolt,then feed the bolt through From the Engine side through the rear iron, the trans and starter and put the nut on.(it may have been on the other way but Trust me it is easier to get the starter on and off when the bolt is this way.PLUS you do not loose the Neg wire when you have to remove the starter,it stays on that bolt!)
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Thank you for the advice! once I switched that ground around and the other capacitor, I cranked it over and its getting fuel ... not sure on spark yet, I had a minor fuel leak to take care of.
I have another question now, Is the injector harness labeled with that colored stripe front or rear? Here's a pic of how its setup now, Im not sure if the primary/secondary injectors are labled front/rear somehow or if it matters which order they are hooked up in, although I would imagine so considering the front and rear rotors fire at different times!?
I have another question now, Is the injector harness labeled with that colored stripe front or rear? Here's a pic of how its setup now, Im not sure if the primary/secondary injectors are labled front/rear somehow or if it matters which order they are hooked up in, although I would imagine so considering the front and rear rotors fire at different times!?
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So based on what you said and my picture .. It looks like I have the front secondary injector plug mixed up with the rear secondary, but the only one that has a color stripe is that orange one.... any other way to tell for the primarys?
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not sure what you mean 3F , 3C , 3H. AND 3E though? is that a measure of resistance or continuity?
Last edited by lucky87T2; 05-07-13 at 09:40 PM.
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Okay guys I got this thing running good however I'm having issues with 3800rpm-4000rpm backfiring and hesitation .
When I unplug the rear secondary and front secondary injector plugs the car hits a brick wall rev limit like at 4000rpm.
With both plugged in it will rev to 5k or so then starts popping real bad like unburnt fuel out the exahust. the rear rotor seems to make no difference whether its injector is plugged in or not but I know its working fine below 4k , this would mean the ECU is at least getting some fuel in through the front secondary correct? so I cannot figure out if it's an injector or electrical issue.
Here are pics of the connectors that need a home , if you can help me identify them I would really appreciate it!
First up is this yellow wire w/ white stripe. under the upper rear intake area -
Next is obviously a ground for something, but what? and is this the cause of my hesitation? I did an emssions delete so could this be extra? there are no matching connectors within its reach.
When I unplug the rear secondary and front secondary injector plugs the car hits a brick wall rev limit like at 4000rpm.
With both plugged in it will rev to 5k or so then starts popping real bad like unburnt fuel out the exahust. the rear rotor seems to make no difference whether its injector is plugged in or not but I know its working fine below 4k , this would mean the ECU is at least getting some fuel in through the front secondary correct? so I cannot figure out if it's an injector or electrical issue.
Here are pics of the connectors that need a home , if you can help me identify them I would really appreciate it!
First up is this yellow wire w/ white stripe. under the upper rear intake area -
Next is obviously a ground for something, but what? and is this the cause of my hesitation? I did an emssions delete so could this be extra? there are no matching connectors within its reach.
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Thank you for the reply! But where is the water temp gauge sending unit located.. lol? Im guessing your meaning the water temp sensor in the back of the water pump housing?
Last edited by lucky87T2; 05-22-13 at 10:08 PM.
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Okay I see , I noticed I have an extra connector down there! it was just a little short to reach, I guess the harness needs moved around a little! gonna try it and Ill let you know what happens! I must be missing the copper tongue by the firewall because I dont seem to have one .. not sure why my secondarys are only working on one rotor either, the rear injector harness seems to be the culprit. I swapped injectors and its still not firing the rear rotor after 3800rpm
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