Project Astrid
#121
350Z-holic
iTrader: (13)
I speak from experience - I made my own harness and I think I did an excellent job labelling, checking, double checking, and documenting everything ... and when it was all said and done the car started, I could rev up to about 3500RPM and then the tach and revs when batshit crazy ... I swapped a used harness in (after I re-wired my link sensors) and everything worked fine.
I think I messed something up with the capacitor located in the ignition / fuel injector subharness ... I think theres a reason that no aftermarket has mass / minimally produced an aftermarket engine harness for this car.
I think I messed something up with the capacitor located in the ignition / fuel injector subharness ... I think theres a reason that no aftermarket has mass / minimally produced an aftermarket engine harness for this car.
#122
New Member
Thread Starter
Ok lets take a step back
Do the following.
Pull the Fuel pump fuse.
Pull all your plugs and coils out.
Start at coil 1, put your plug in the coil. Hold the coil about 1/4" away from your plenum.
Hava a friend crank the car and look for spark jumping from the plug the intake. But be CAREFUL it does not feel good to get shocked.
Rinse and repeat for the other cylinders.
Report results back.
Do the following.
Pull the Fuel pump fuse.
Pull all your plugs and coils out.
Start at coil 1, put your plug in the coil. Hold the coil about 1/4" away from your plenum.
Hava a friend crank the car and look for spark jumping from the plug the intake. But be CAREFUL it does not feel good to get shocked.
Rinse and repeat for the other cylinders.
Report results back.
#123
New Member
Thread Starter
The lower the compression the more advanced initial start advance should be. Follow the dictum of FI. As boost comes on ignition retards appropriately thus opposite curve for lower *compression* For start cycle only I would suggest go advanced until it tries to just kick back. Not actually kickback but stall, at this point retard about 5 degrees. Once running it should then retard back to where you want the smoothest idle. Usually highest idle then minus ~50 rpm
if i under stand you correctly for the lower static compression the ignition event should be moved closer to TDC and look more like this?
#124
New Member
Thread Starter
I speak from experience - I made my own harness and I think I did an excellent job labelling, checking, double checking, and documenting everything ... and when it was all said and done the car started, I could rev up to about 3500RPM and then the tach and revs when batshit crazy ... I swapped a used harness in (after I re-wired my link sensors) and everything worked fine.
I think I messed something up with the capacitor located in the ignition / fuel injector subharness ... I think theres a reason that no aftermarket has mass / minimally produced an aftermarket engine harness for this car.
I think I messed something up with the capacitor located in the ignition / fuel injector subharness ... I think theres a reason that no aftermarket has mass / minimally produced an aftermarket engine harness for this car.
#125
350Z-holic
iTrader: (13)
I looked at some older maps and maps I saved from buddies and timing ranges from 5 degrees to 12 degrees in my haltech files and I run 20degrees in my link. The ECT and IAT do influence them a little but nothing significant. If you cannot get the car to start with 10 to 20 degrees timing on a cold engine in normal temps than I would rule-out your tune.
#126
New Member
Thread Starter
Originally Posted by bealljk;[url=tel:11046119
11046119[/url]]I looked at some older maps and maps I saved from buddies and timing ranges from 5 degrees to 12 degrees in my haltech files and I run 20degrees in my link. The ECT and IAT do influence them a little but nothing significant. If you cannot get the car to start with 10 to 20 degrees timing on a cold engine in normal temps than I would rule-out your tune.
#127
New Member
Thread Starter
Well I replaced the ignition capacitor and still no go, reworked the coil harness again to make sure everything was clear and still haven’t found any issues there, I’m convinced there is an electrical issue somewhere because I keep blowing the shared ecu/ignition fuse every few cranks. I moved the ignition components over to their own fuse and relay but I didn’t have another fuse for the ecu last night to try again before shutting down for the night, I’ll pickup more fuses on the way home for work, if that fuse keeps blowing it will isolate it to ecu if it’s the ignition then the new fuse will go. I think the next step is to get the oscilloscope and see if the ecu is outputting signal. Worse case scenario ecu is damaged, I’m not sure where to go from there but I’ll try to keep you guys updated as I try things and figure stuff out
#128
New Member
Thread Starter
With coils isolated I’m no longer blowing ecu fuse, at least not in the several tries to start it. still no start, or codes. decided on a whim to run temp 4ga grounding cables to each cylinder head, block, and timing cover just in case it was something stupid like a bad ground but no discernible change
#129
350Z-holic
iTrader: (13)
Before you assume its the ECU I would really just go find a replacement engine harness and swap that out ... yea, it's gonna cost you $100 to $300 but it could be the culprit.
If you want me to send you my spare harness I am more than happy to box it up and send it out and see if that's the issue. My caveat is that I picked it up from a G35 sedan and the seller claimed it was the same harness ... I didnt want to argue with him and I was getting for a steal.
Regardless ... one step at a time...
If you want me to send you my spare harness I am more than happy to box it up and send it out and see if that's the issue. My caveat is that I picked it up from a G35 sedan and the seller claimed it was the same harness ... I didnt want to argue with him and I was getting for a steal.
Regardless ... one step at a time...
#130
New Member
Thread Starter
Originally Posted by bealljk;[url=tel:11046572
11046572]Before you assume its the ECU I would really just go find a replacement engine harness and swap that out ... yea, it's gonna cost you $100 to $300 but it could be the culprit.
If you want me to send you my spare harness I am more than happy to box it up and send it out and see if that's the issue. My caveat is that I picked it up from a G35 sedan and the seller claimed it was the same harness ... I didnt want to argue with him and I was getting for a steal.
Regardless ... one step at a time...
If you want me to send you my spare harness I am more than happy to box it up and send it out and see if that's the issue. My caveat is that I picked it up from a G35 sedan and the seller claimed it was the same harness ... I didnt want to argue with him and I was getting for a steal.
Regardless ... one step at a time...
Last edited by Rinzlark; 03-22-2021 at 07:27 PM.
#132
New Member
Thread Starter
Never-mind I found a non-REVUP, manual, 06 harness on ebay. Double checked the donor vehicles vin to make sure it was non revup and manual. Should be here next week
#134
New Member
Thread Starter
Update time,
the harness I ordered came in, and low and behold it’s for an auto, I checked the vin provided in the description again and still came up manual 😑 I decided to just convert it to manual which turned out to be more work than I thought since there are several wire differences between f1, f2, f3, ecu etc for the automatic trans, the good news is all the pins and connectors use the same pins for the engine, I managed to get her started for about 3 seconds and she ran rough before the ecu fuse blew again, replaced the fuse and she ran rough for about 10 seconds and died. Seams like I’m still only getting spark on the passenger side bank. But she is starting now which is at least a step in the right direction, next few things I’m looking at are fuel pressure, I originally set it at 52 but with the car running I was seeing 55-56 so I’ll drop that back down to 50-52. Then I have the extra grounding wires I made previously that I’m going to put back on and see if that doesn’t do anything. I’m not getting any codes yet so I’m hopeful it’s a grounding issue
the harness I ordered came in, and low and behold it’s for an auto, I checked the vin provided in the description again and still came up manual 😑 I decided to just convert it to manual which turned out to be more work than I thought since there are several wire differences between f1, f2, f3, ecu etc for the automatic trans, the good news is all the pins and connectors use the same pins for the engine, I managed to get her started for about 3 seconds and she ran rough before the ecu fuse blew again, replaced the fuse and she ran rough for about 10 seconds and died. Seams like I’m still only getting spark on the passenger side bank. But she is starting now which is at least a step in the right direction, next few things I’m looking at are fuel pressure, I originally set it at 52 but with the car running I was seeing 55-56 so I’ll drop that back down to 50-52. Then I have the extra grounding wires I made previously that I’m going to put back on and see if that doesn’t do anything. I’m not getting any codes yet so I’m hopeful it’s a grounding issue
Last edited by Rinzlark; 04-03-2021 at 09:12 AM.
#136
New Member
Thread Starter
Ok major issue has finally reared its head, I still have some electrical issue. I melted 3 maybe 4 oem coils literally let the magic smoke out and had the coils expand and bubble 🤦♂️
#138
New Member
Thread Starter
#140
New Member
iTrader: (1)
http://dtec.net.au/Ignition%20Coil%2...n%20the%20coil.