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Post by Stinger on Mar 16, 2010 22:20:23 GMT -5
You just follow the 87-90 swap page. If you know what you are doing it takes about 15 minutes. I'd suggest you read the swap page until you have it memorized, then triple check everything, then post questions to verify you aren't screwing it up. This would require specific questions though, not generic "cut wires to sensors" type questions. Something more like "so do I cut the wire to the BAP sensor or do I hook the wire from the VAM to it and leave it going to the BAP as well" would be ideal.
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4banger
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Post by 4banger on Mar 16, 2010 23:53:59 GMT -5
well see man i have nevr taken a wire harness out of a car, and the harnes that i need is still in the parts car that i found, so if you could tell me on what i need to do on how to get it out. do i need to unhook all the sensor' from the parts car? i am goin to be doin this maby alone but i printed out the 87-90 swap swap and i have read it about a 100's times lol, but if you could tell me on how to get that harness out thanks zack
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4banger
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Post by 4banger on Mar 17, 2010 0:34:05 GMT -5
ok on the 87-90 swap why is there a shorter list than the 91-93 swap like why is there more to do??? so all i got to do is read the 87-90 swap and i can have my car back up and running wright? ? but just by reading that page that is all i got to do??
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Post by Stinger on Mar 17, 2010 3:32:16 GMT -5
The harness is basically a matter of unbolting it from the ecu, then unplugging anything that keeps you from removing it from the car. Don't cut anything, it all unplugs or unbolts (ground wires). You will have to unplug all the sensors and such of course since that's what it connects to.
The 87-90 swap is simpler because the engine is identical, minus the turbo. The 91-93 cars used a different ignition system (no distributor, dual coil packs, crank sensor, 8 spark plugs) as well as many other "different" parts. Combine this with a different pinout at the ecu (they moved the wire locations compared to the 87-90 and turbo cars) and it makes for a more complicated swap for the later cars.
I can't say whether a new harness properly modified will fix your issue. It will eliminate a number of questions or "unknowns" though and will get rid of that rat's nest of wires under your hood.
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4banger
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Post by 4banger on Mar 17, 2010 20:02:05 GMT -5
o ok this sounds easy know that i kind of under stand it a little more. but it has to be my wireing or a bad sensor wright??? i did a compresion test and leak test and nothing so it has to be one of those 2 problems wright?
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Post by Stinger on Mar 17, 2010 22:19:09 GMT -5
If it was a sensor it would throw a code for it. It's a pretty good chance it's the harness. I don't trust other people's work 100% so I'm not completely convinced whether the engine is mechanically sound and the timing is correct but with the info provided, harness is the best guess.
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4banger
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Post by 4banger on Mar 18, 2010 1:42:20 GMT -5
o ok, well i did the tests my self then i paid some one to do it. the compression is all go, no oil leaks, ect ect. i am trying to find a harness here where i live but they guy wants way way way to much but i am goin to see if i can talk him down. the timining is wright on i did it and then my dad did it and it was spot on. so i am leaning toward's the harness, i have to get the intake back on after swaooing in the new fpr, and i got to still put in the ect sensor. and after that i will run a scan agian and see what i get, if i still get a few more codes is it better for me to just rewire it or just deal with it? my dad tell's me its not the wireing but i keep telling him why would it throw all them codes like you said every one of those sensors would have to be bad wich i think is in possable but maby but i dont think so
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Post by Stinger on Mar 18, 2010 2:24:54 GMT -5
If you really knew what you were doing you could just rewire the harness you have by comparing wire colors with a diagram and verifying each wire with an ohm test. Since that isn't going to happen, I really think it's your only option to get a new harness. Worse case scenario, you can sell the harness again if it doesn't fix it.
I'm not sure how "deal with it" is something you are considering. The engine barely runs so the only way that's something I'd "deal with" is if I only planned on driving the car to the crusher.
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4banger
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Post by 4banger on Mar 19, 2010 1:12:25 GMT -5
you know what i am trying. its a little hard whne i am doin this my self. i was asking a simple qustion all i wanted to know is if there will all ways be codes??? like because o fthe wireing??? i will just replace the whole harnes, i think that would be easier wright? ?? it hard when you go tno one to help you. so i am goin to finish this my self. my dad keeps saying its the fuel pressure and all this well i got him saying that and i got you guys saying its not that, so i am haveing a little trouble doing what needs to be done. its a little stress full lol, pluss when i only got a little time to work on this
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Post by Stinger on Mar 19, 2010 4:01:22 GMT -5
I wasn't taking a stab at you with that first comment, I'd say less than 5% of the population would even consider trying to rewire that mess of a harness you are running now.
There will always be a few codes associated with the swap. Replacing the harness and re-wiring for the turbo engine will be 10x easier than trying to "fix" what you have.
At idle, there is only one thing that can be wrong about the fuel pressure (it having the wrong pressure). You've already tested and verified that's not it so I have no idea how your dad thinks that's still the problem.
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4banger
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Post by 4banger on Mar 19, 2010 13:01:39 GMT -5
see thats what i say about the pressure. so i am thinking its the wiring it has to be that, wright??? i am getting here back together today and goin to redo the fuel pressure test so my dad can see it. and after that i think i will take the old harness out and put in the new one as soon as i find one. i think i found one but i think the cars is a 91 i need to call and see what year it is. but i will update when i need help with the wiring, thanks for helpin
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Post by Stinger on Mar 19, 2010 13:48:50 GMT -5
You can only use an 87-90 harness.
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Post by denz on Mar 19, 2010 20:02:42 GMT -5
4banger where you located.
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Post by oneowner88lx on Mar 19, 2010 22:24:13 GMT -5
If you find a harness make sure you look it over good to check for cracked wires and broken connectors. No sense in paying good money for a messed up wire harness, RIGHT.
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4banger
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Post by 4banger on Mar 20, 2010 1:39:18 GMT -5
denz i am from montana. ya i will not let them take the harness out if it is the year i need 87-90 but for some reasen i think its a 91. well i got the ect sensor in, goin to put the intake back on tomarrow, and re test the fuel pressure even tho i dont think that is the problem, but after swapping the sensor i will run the codes. but after all that i am goin to work on the wiring. and i plan on check the other harness to see if there is any crack ect ect but it looks pretty good, but i will update as soon as i do the test tomarrow and if nothin changes then i gess monday i will buy that harness and start wirin lol
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