I need help with a few last things with my swap

Post by **yourmomsrps13** » Thu Aug 25, 2005 6:33 pm

Im about to put the CA in my car i got the harness and ignitor yesterday and ive been going over it and everything making sure i replaced everything i needed to and have everything i need. Now i came across a few things that might be a problem....problem #1. I bought a converted harness and a q45/ca18det ignitor, here is the plug compaired to my harness plug now if all i have to do is move that one pin to the missing hole/spot thats not a problem but i also dont have the smaller 4 pin plug in my harness so im thinking that its not wired for this ignitor (because multiple ign. work) problem #2. after looking over my harness some more i noticed i dont have a plug for this... which im not sure what its for. And last but not least problem #3. im using my stock lower harness for the starter and transmission but the sensors in the CA transmission dont look compatible with my USDM harness i think im suppose to use the usdm MPH sensors. Hope i didnt forget anything.any help would be much appreciated and thanks Before hand.

Post by **float_6969** » Thu Aug 25, 2005 7:04 pm

#1- That appears to have been wired for an SR ignitor. You've got the plugs for the CA/Q45 ignitor, I would re-wire it to use that ignitor, as it's much cheaper and easier to come by.

#2-That is the Knock sensor. I would assum that since you're using the USDM lower harness and you don't have this plug, it was a SOHC vehicle. You'll have to either get ahold of a CA lower harness, or get a DE on, or at least that plug from a DE one. I was lucky enough to get a CA lower harness, so I didn't have to mess with it. The problem with trying to adapt the KA lower harness to the CA is that the connections to the alterntor &/ starter are different and will have to be modified.

#3-Once again, problems associated with using the USDM lower harness. There will be plugs that you won't have places for and you will have problems hooking up the alternator &/ the starter. You will need to remove the speed sensor (one bolt, last sensor in transmission) from the USDM transmission, and put it in the CA transmission.

Post by **yourmomsrps13** » Fri Aug 26, 2005 5:14 am

how do i hook up the alt and starter then? do i have to buy a CA harness or will a kaDE lower harness work? the DE harness has a knock sensor? and it plugs right into my 1990 240sx?

thanks

Post by **NeedCAforS13** » Fri Aug 26, 2005 7:12 am

use the lower KA harness (either SOHC or DOHC) and hardwire the knock sensor to the ECU pinout for it... I don't know which one off the top of my head, but search, there's plenty of threads of how to wire up a knock sensor

I don't think the DE has a knock sensor on the lower harness Ryan... I had to hardwire my knock sensor to the ECU.

Sean

Post by **fallen180sx** » Fri Aug 26, 2005 7:31 am

i just wired the knock to pin #23 i think it was.. i believe its a white wire? well.. unless you do that youlle be runnin limp mode which is what i was doing and i was like wtf is wrong.. after wiring it up.. boostin it up woohoo

Post by **yourmomsrps13** » Fri Aug 26, 2005 4:48 pm

Im gonna hard wire it, what about the alt. plug and starter? what plugs wont i use? THANKS for all the help and support, i wouldnt have gotten this help on the **cough cough** 240sxforum where all they wanna do is flame when i ask reasonable questions and do all my searches. btw which is the speed sensor on the transmission? there is 2 one nearest to the shifter and the other one, which needs to be replaced with my USDM one?both?

THANK YOU ALL

Post by **NeedCAforS13** » Fri Aug 26, 2005 5:43 pm

starter and alternator off the 240sx harness should be the same plugs as the CA (mine was). The speed sensor is the bigger round plug that comes off with a 10mm bolt. Its the only one held on with a bolt!

the other plugs are the reverse and neutral sensors. You can swap the USDM ones over to make wiring easier, or rewire the JDM plugs to fit the USDM plugs on the harness. Either way is easy...

Sean

Post by **float_6969** » Fri Aug 26, 2005 6:47 pm

Well if I hadn't chopped it up, I'd take pictures. I don't know if it's different for the DE vs. E, but I'm pretty sure it would be harder to hook up the E lower harness than the CA or DE. I also really thought the DE has a knock sensor and has the wiring for it already.

Post by **sdtouge** » Fri Aug 26, 2005 8:52 pm

the ka24e harness is super easy, even with a ke lower i think youll still need to hard wire

Post by **biosehnsucht** » Fri Aug 26, 2005 10:55 pm

I rewired my CA harness to plug into the rest of the KA-E harness as far as the plugs near the battery are concerned, kept the lower harness for the alt/starter (had to make an adapter peice for the start I think) and hardwired the knock sensor also..

Post by **float_6969** » Sat Aug 27, 2005 4:01 am

biosehnsucht wrote:I rewired my CA harness to plug into the rest of the KA-E harness as far as the plugs near the battery are concerned, kept the lower harness for the alt/starter (had to make an adapter peice for the start I think) and hardwired the knock sensor also..

That was it. Maybe the alternator hooks up fine, and it's the starter that doesn't have the same connections on it. I didn't have to actually mess with it, so I'm basing my statement off of what others have said, and what I've seen of the KA-E harness vs. the CA harness

Post by **biosehnsucht** » Sat Aug 27, 2005 6:21 am

it was as easy as cutting off the wire from the KA-E starter and crimping a spade connector on it IIRC.

Post by **sdtouge** » Sat Aug 27, 2005 8:04 am

yep its the starter, i wrote about it in the fa but it didnt come out the way i wanted it to lol

Post by **yourmomsrps13** » Mon Aug 29, 2005 3:49 pm

(searched) does the knock sensor wire length matter? i ask because i believe it works on resistance and wouldnt lengthing it change that? also is there anyway to wire a LED into this wire to light up when det. occurs?

Thanks!

Post by **float_6969** » Mon Aug 29, 2005 5:32 pm

It shouldn't matter too much as long as we're not talking about 10 feet difference. regular 8/10 gauge wire should have little enough resistance that I don't think it would effect the ECU's ability to accuratly gauge the sensor imput.

Yes, but I don't know how. Ask biosehnsucht, he's good with that stuff.

Essentially, you'd have to know what change in reisistance knock causes. I BELIEVE (not sure) that the reistance increases as knock occurs. It might be the opposite though.

Post by **NeedCAforS13** » Tue Aug 30, 2005 3:49 am

an safc can measure knock count... there is also a knock meter (I think HKS makes it) that tells the difference between normal and excessive knocking.

Sean

Post by **yourmomsrps13** » Wed Aug 31, 2005 7:29 am

once again thanks to everyone who has helped, now all i have to do is wire this ignitor in but ive searched and searched and i cant find a good diagram of what wires on my ignitor get wired into my CA harness. Anyone have a good diagram or point me to a place that does?

Post by **float_6969** » Wed Aug 31, 2005 7:39 am

You'll just have to sort though the FSM. It's in there, but might be hard to find/understand.

Post by **yourmomsrps13** » Wed Aug 31, 2005 4:28 pm

damn, yeah all i got for a FSM is on a burnt CDr.

Post by **capowered240** » Thu Sep 01, 2005 1:02 pm

This website might help. http://www.impactblue.org

I need help with a few last things with my swap

I need help with a few last things with my swap

Re: (float_6969)

Re: (NeedCAforS13)

Re: I need help with a few last things with my swap (yourmomsrps13)

Re: (biosehnsucht)

Re: (sdtouge)

Re: (NeedCAforS13)

Re: (float_6969)

Re: (yourmomsrps13)

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums