manitcor Posted July 5, 2005 Report Posted July 5, 2005 Allright Ive got just about everything I need (including time) to finally do my ODBII upgrade. I do have a question though, the fuel injector harness I have for the 22.5lb injectors does not match up with the connectors I have on the main engine harness for the donor car. The injector harness is from a 00+ GAGT and the donor engine harness is from a 96MC. I expected a possible incompatibiltiy. My question is: Is there a car I can get an injector harness from that will work with the 22.5lb GAGT injectors and the 96 engine harness. OR Can I use my 95 injector harness and just splice the different injector connectors onto the 95 harness or will I have to get a 96 harness to pull that off? Quote
GP1138 Posted July 6, 2005 Report Posted July 6, 2005 Do you have a list of stuff to perform this upgrade anywhere? I also want to get the 3400 injectors to work with my 3100/3400 hybrid, but I don't know if it's as simple as just splicing them into my current harness. Quote
manitcor Posted July 6, 2005 Author Report Posted July 6, 2005 Do you have a list of stuff to perform this upgrade anywhere? I also want to get the 3400 injectors to work with my 3100/3400 hybrid, but I don't know if it's as simple as just splicing them into my current harness. Pretty simple if you have an ODB1.5 Car 1st you need to check the connector on your trans and make sure its a red 7-pn connector after that: Wiring harness from ODBII car(prefferable same model and engine as yours) Computer from same year MAF EGR (optional) If your doing the injector upgrade 22.5lb injectors from a 3400 car. As for the harness, well thats the question im asking Since Im going from a 95 setup to a 96 set up thats about all I need. Im going to the 22.5lb 3400 injectors is because of the engine and the headers. Once I have all this working I will be upgrading the PCM to a DHP and finally get to use my mods Quote
Turbocharged400sbc Posted July 6, 2005 Report Posted July 6, 2005 just used the weatherpack connector from your 95 harness (both sides and change out the pins (make sure they are located right) as I believe the pin style didnt change it was just the connector body that was changed... or just splice the newer inj connectors onto the inj harness that plugs into the main PCM loom Quote
Canada Posted July 6, 2005 Report Posted July 6, 2005 I don't know if they are weatherpack connectors....I think they might be metripacks or whatever.......it doesn't matter, they are the same. You can pull the metal prongs out of the connectos and swap them over......there is a special tool to do it, but that cost money and a pick works just as well. Just be sure to swap one wire at a time so you don't get them mixed up. Quote
Turbocharged400sbc Posted July 6, 2005 Report Posted July 6, 2005 my pair of electrical connector terminal tools was 50$ from snapon and I use them ALOT! time to warantie one of them as I have accidently slammed it in my drawer recently (i know I'm gonna need it soon now that ot's broke...) one pin at a time.... Quote
manitcor Posted July 26, 2005 Author Report Posted July 26, 2005 Ok so everything is installed and Ive been battling this problem now for a couple weeks. Ive tried just about everything so Im hoping someone might have some insight for me. The car cranks and I have power to the fuel pump however I have no spark. I get a solid signal from the 3x crank sensor but when measuring the power connector to the IGN module (connector with pink and black wire on the passennger side of the module) while cranking I get no power at all. So no spark, and of course no start Neutral Check at the IGN relay it does not seem to be tripping the relay at all. Could this be a pass-lock issue? Does the PCM actually measure the resitance or is it something else I need to check. What tests can I do to narrow down the issue. I have 2 ODBII pcms and neither work so I dont think that is it. Quote
GP1138 Posted July 26, 2005 Report Posted July 26, 2005 The crank sensor wire goes on the driver side of the IGN module. Trust me, I just dealt with it last night. Quote
GP1138 Posted July 26, 2005 Report Posted July 26, 2005 Wait, I just reread what you wrote. I was thinking you were talking about the crank sensor connector when you said "power connector". Maybe I misread you. Quote
manitcor Posted July 26, 2005 Author Report Posted July 26, 2005 Wait, I just reread what you wrote. I was thinking you were talking about the crank sensor connector when you said "power connector". Maybe I misread you. there are 3 connectors on the IGN moule. On the drivers side the small 2 wire (yellow and purple) is the 3x crank sensor which is working fine (gets low AC voltage when cranking). The larger connector on that side is a control and singal wires to the PCM as well as the Tach. The one on the passenger side (pink and black with white strip IIRC) is the one Im having the problem with. This one actually provides power to the IGN module so that it can produce spark. This connector as far as I can tell is hooked to a relay in the pass side underhood fuse panel and the relay seems to be controlled by the PCM. On the power side of the relay I get a steady 12volts. However the relay does not seem to be getting triggered when cranking the car thus giving no power to the IGN module and of course then no spark. Does that help? Quote
manitcor Posted July 26, 2005 Author Report Posted July 26, 2005 Can you check for DTC's? I cant yet, I have yet to wire up the DLC and it wouldnt help much anyway, I dont have a code reader and I really dont want to spend $150 for one unless I really have to. Quote
GP1138 Posted July 26, 2005 Report Posted July 26, 2005 Yes, that makes more sense. Sorry, I have ADD or somesuch and don't understand tiny little details right away. Do you have access to GM Service Information? Maybe there's a wiring diagram or something there that could help you. Quote
manitcor Posted July 26, 2005 Author Report Posted July 26, 2005 I have a hayes book, but it has proven pretty useless, hell in its diagram it doesnt even show the relay, I had to call a freind with a 96 because when I noticed that I was afriad I didnt have the right harness but he also has the relay. Quote
Turbocharged400sbc Posted July 26, 2005 Report Posted July 26, 2005 Hayes has some of the most generic diagrams i've ever come acrost...they dont help much... you should see the diagrams that Mitchell has fer your 96 MC harness...talk about a rats nest.... btw fer anyone else i have helped mantiocore here: http://www.mymonte.com/discussion/viewtopic.php?t=7610&start=20 just in case anyone else is having the same issues... just check fuse 12...lol but it's a little more complicated than that... i really wish that mitchell would let me cut and paste but if the damn printer was working i could print it out then scan it then host it so that everyone could see the 10 pages of diagrams that contain the info needed... James, the psychotic gearhead Quote
manitcor Posted July 31, 2005 Author Report Posted July 31, 2005 ok ive got what I think is a security issue, but here is the skinny: Getting power to the IGN relay and jumpered the relay to veryfiy that I could get power to the IGN module if the relay were working and that is all good. There is no power to the control wire from the PCM also I have no Injector pulse (tested with a noid light). I tested fuse 12 (5a) in the dash which runs from the IGN switch to the PCM and got power there however I could not verify if I was getting power to the PCM it was diffcult to get a test lead into the connector and I really didnt want to pierce a probe through that wire. So I picked up an Actron ODBII code scanner but I need to hook up the ODBII data connector to even use this. I have an ODBII connector from a 96LS and it has 5 wires: 1 Orange (power 5v or 12v im not sure) 2 Black (grounds) 1 Tan 1 purple The tan and purple I believe are data however I dont know what Pins on the PCM to wire them to. Does anyone know? Quote
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