the 2 wires that run on the harness to the secondary plugs...1 is like tan and striped i take it is the power source wire and the other is the ground? so i am converting my low imp injecters to high and got a 10 ohm 10 watt resister to tap into the line..which i would figure you just sauder it into the power(tan striped wire) the. rewrap in electrical tape..is this the right wire?

 

First of all, if you really are putting high impedence wires in an 87 car you should not be soldering in resistors. You will need to bypass the stock resistor pack. IMO it is stupid to put high impedence injectors in a low impedence harness, because you will eventually will want even bigger injectors and bigger injectors are all low impedence pretty much.

assuming you misspoke and this is say an 88 s4 T2, see FSM page 4B-32 and 4B-33. solder them in by the ECU, but do it cleanly. peel back the outer shell on the engine harness if you haven't already done so, and locate the wires according to the diagram (diagram shows the back of the connectors). cut and solder the wires, twisting them together securely, and using a quality soldering gun (I recommend the Weller 130 watt gun, available at any home depot for about $30. this is better than even my Craftsman gun).

Heat the wire first and then feed a little bit of solder in there (the wire won't take solder until you've heated it pretty good), but touch the solder to the wire, not to the gun itself. Don't put a big glob on there by just touching the solder to the iron and dripping it on to the wire. If you use a quality gun like the aforementioned Weller you will have a much more reliable connection. Crappy solder joints cause electrical problems. Then tape up the solder joints as tightly as possible, or better yet use heatshrink.

 

It doesn't matter which wire you chose, the ECU will see the same total resistance either way.

And it's solder...

 

It is a little bit of a puzzle as to what car you have. Your profile says 88, so it already is set up for high impedence.

 

The first jpg shows the wire colors for a car with low impedence injectors.

The second jpg shows the wire colors for a Late 1987 and on car with high impedence injectors.

But you say you have a wire your looking at with a tan and stripe (Brown/Yellow, Brown/white, Brown/Red, Brown) and that would be a low impedence harness with a solenoid resistor package located on the fender below the air filter. So the car isn't a 88 then, if pure stock.

 

i have a 88t2 and this is original harness..and i ran 4 550 high imp injecters stock..got them all cleaned..then using the 2 high imp 550 primaries then have 2 850 low imp secondaries need to covert them to high therefore the resisters.installed rtek 1.7 so im upgraded in the ecu department..

 

ill double check the colors on the harness it was quick look

 

Thank you..

 

here is a pic i took of the wires just to clarify things..now which on do i splice to put on the resister

 

my guess is the tan with stripe

 

FSM wiring diagram?

 

You sauder the resistor to either wire. Your's is a 88 so one wire on each injector plug is black/yellow. That's the wire that is supplied power from the EGI fuse. The other wire on the injector goes to the ECU. The ECU pulses a gnd to that wire to make the injector operate.

The other wire will be brown, brown/white, brown/red etc. Does not matter which wire gets the resistor saudered to it.....some humor involved here.

 

Did you miss this?

 

well since the whole you might have a 87 with resister pack already there and all i just wanted to make sure everything was matching up making sure im not making more of a mess of things. i didnt want to hack up the harness basically. thanks all thread closed