4g63t / AWD 7g Build

**DOHCstunr** · 05-20-2009, 09:06 AM

yeah I had the benifit of being both manual, and already equipped with distributorless and knock sensor equipped in my facktory harness.
so i literally didn't have to add any wires.

you have the resistor pack wired into the injectors correct?

**eclipsh** · 05-20-2009, 02:01 PM

Yup, the resistor pack is in there. I actually just pulled the whole wiring harness back out and I'm going over it again. Jeff from Keydiver PMed me on DSMTuners and let me know that pin 13 does need to see voltage from the fuel pump and that I can just send the signal from the MPI relay. I tried a quick fix for that in the car but it didn't make a difference. I'm also still only seeing 2.8v at the TPS which I'm fairly certain should be seeing 5v. So I'm going over all the wires again, cleaning up a few areas and stuffing the harness back in again when I'm done.

**eclipsh** · 05-20-2009, 05:46 PM

Well I went over and tested all the wires, moved the power supply for Pin 110 to IGN1 instead of Start and correctly wired Pin 13, then reinstalled the harness. The car will run a bit longer now that the ECU is getting power consistently but I'm still only getting 2.8v to the TPS and also the MAP sensor. Both of these are powered by Pin 23 of the ECU which should be sending 5v. I checked at the ECU and of course I get the same 2.8v. To me that says I probably have a problem within my ECU, possibly my capacitor replacement gone wrong. I think I'll be sending the ECU out for diagnostics and possible repair tomorrow.

**DOHCstunr** · 05-21-2009, 07:08 PM

is your tps, iat, map, coolant temp sensor, and um...... i think thats it,

are they grounded to the "sensors ground" pin on the ecu?

**eclipsh** · 05-21-2009, 10:51 PM

You know, I'm not sure. I'd have to dig through the harness again or go do a quick test come morning.

**DOHCstunr** · 05-22-2009, 12:11 AM

i think that was the only problem I came across other than the cooling fans when I first started up after my swap.

**eclipsh** · 05-24-2009, 08:11 AM

Well I ran out and tested pin 24, the sensor ground and it does not ground out to the chassis. I also tested the ground for the IAT and TPS and they do not ground out to the chassis. Looks like I didn't screw that one up :)

DOHCstunr, which wire did you run your fans off of or did you use a switch? I wired mine to the two wire coolant temp sensor and they came on as soon as the key turned.

**DOHCstunr** · 05-24-2009, 09:55 PM

Originally Posted by eclipsh

Well I ran out and tested pin 24, the sensor ground and it does not ground out to the chassis. I also tested the ground for the IAT and TPS and they do not ground out to the chassis. Looks like I didn't screw that one up :)

DOHCstunr, which wire did you run your fans off of or did you use a switch? I wired mine to the two wire coolant temp sensor and they came on as soon as the key turned.

i will take a pic and try to draw up a diagram for you tomorrow when I wake up.

**Blue Ice** · 05-25-2009, 09:46 AM

It might just simply be the ECU, when i was having all my problems with my swap , the car would crank and crank, but never turn over. turned out it was a bad ecu. Does your check engine light come on before you ever try to crank it? it should come on and then turn off after a couple of seconds if you put it into the accessory switch. if it never comes on, then you have a bad ecu.

You're doing a lot of the same things i did, rig the fuel pump, pull the harness, screw with the timing and injectors.

you'r basically using a 1g engine with a 1g ecu, so the Magnus 1g in a 2g setup won't apply.

If it's not the Ecu, do you have any boost leaks, the car won't stay running if you have a huge leak, or don't have everything hooked up.

**DOHCstunr** · 05-25-2009, 10:16 AM

Originally Posted by Blue Ice

If it's not the Ecu, do you have any boost leaks, the car won't stay running if you have a huge leak, or don't have everything hooked up.

He's running the same ECU I am. Speed Density via DS-MAP/ Jackal.

No mas, and leaks have zero effect on a/f ratio.

From what I read, he is using the same ecu that was working flawlessly in his Talon before he bought the galant.

**eclipsh** · 05-25-2009, 10:20 AM

Nope, the ECU that was in my 1g Talon went with it. I have a flawless 2g EPROM ECU from the 95 donor that I'm selling. The 1g EPROM ECU that was in the Galant and is now out to be repaired came out of the junkyard the same time as the Galant. It is untested and may very well be the problem. I should find out sometime this week.

Thanks again for all the help and input guys, it makes a big difference.

**eclipsh** · 05-27-2009, 10:28 AM

Well I got some info back on my ECU from Steve on DSM Tuners. He says that he's seeing +5v from pin 23 when he bench tests the ECU. He also says the corrosion on the board is very bad so it will take a lot of cleaning (read $150 repair bill). Thankfully I just sold my 2g EPROM ECU so that'll pay for my 1g ecu repair.

That also tells me I have some sort of wiring issue. Thankfully I did find a useful article on automotive electrical diagnostics this morning. I'll do what I can without the ECU here and see what else I can find when it gets back.

**eclipsh** · 06-02-2009, 06:30 PM

Well I got some more work done today. I started out by checking the voltages and grounds going to the ECU connectors. Everything looked golden so I went ahead and pulled the harness out again. I can pull it in less than five minutes now.

I laid the harness out on my garage floor and began by testing for connections to pin 23, the +5v sensor supply. Thanks to some reused Galant components I wired the ISC motor power supply to pin 23 instead of a 12v supply from the MPI relay like I should have. So I fixed that and checked all my sensor grounds to make sure they were only going to ECU pin 24 and checked the resistance on the wires. After that I improved the grounding to the CAS and coils and moved a few wires around to make the harness neater inside the bay. Now it is back in and should be ready to test as soon as my ECU gets back to me in the mail.

**eclipsh** · 06-03-2009, 04:14 PM

Minor update with video. This site won't let me embed it, or I just can't figure out how, so just follow the link.

Oh and I hooked the transmission cooler in as the power steering cooler too. I also ground down the exhaust flange to clear the drive shaft and worked on the rear brakes. Unfortunately I'm going to have to go get some rebuilt rear calipers as the bleeders just won't come out.

**DOHCstunr** · 06-04-2009, 02:27 AM

Excellent Nick!
glad to see you got her running again. so is your block basically stock?

if it is,
I'd like to be able to compare our tables once you get back to tuning. Undoubtedly our v.e. will be different, but they ought to have similarities that should give us clues to getting out tunes on point.

**kolio** · 06-04-2009, 02:31 AM

GREAT WORK! now we need some vids of wheels spinning!

**eclipsh** · 06-04-2009, 08:46 AM

Originally Posted by DOHCstunr

Excellent Nick!
glad to see you got her running again. so is your block basically stock?

if it is,
I'd like to be able to compare our tables once you get back to tuning. Undoubtedly our v.e. will be different, but they ought to have similarities that should give us clues to getting out tunes on point.

As far as I know the block is stock. The donor came with a E3 manifold and 16G setup so that is what is on it now. I reused my FIC 780cc injectors. I'll have to do a fair amount of retuning since I bumped up in compression and have a slightly bigger turbo than my old s16g. Unfortunately I couldn't tell what fuel pump I got in the deal as there were no visible markings on it.

Not knowing how much fuel I can push should make tuning interesting.

Originally Posted by kolio

GREAT WORK! now we need some vids of wheels spinning!

I promise I'll get video of it driving once I get the car registered. That'll have to wait until the new brakes are on, new windshield is in, a fuel line issue is fixed and the interior is detailed and reassembled. In short, it'll be a while. I"ll be thrilled if it is on the road this month.