Building a diypnp, Standalone harness wiring Options

[HardHead93]

I have been having nothing but trouble with my AEM FIC on my 5sfte set up. I have a 97 Celica GT Convertible with a newly rebuilt engine and a 16G CT-26 turbo set up. The ECU is not working well with the signals the piggyback is feeding the stock ECU. Based on a couple of posts I have seen on 6gc.net, I broke down and bought a diypnp 76 pin standalone. The diypnp has all the features I am looking for and the price doesn't break the bank. I just finished soldering the main board and am about to start doing the harness jumpers. Can anyone provide and example for wiring the diypnp?

[lagos]

I updated your tune file with some new settings and emailed it back to you. I have a few comments.

1. What injectors are you using? Are they 460cc rx7 red injectors? If so, I believe those are commonly used in Miats and the correct dead time (lag time) might be around 1.2. You might want to google search to see if you can find an exact value.

2. Injector battery voltage correction:
After you input the correct dead time and tune the fuel map in the idle cells to 14.7, disconnect the oval plug from your alternator while the car is running. Then watch the ego correction gauge and adjust that battery correction factor so that your idle is still 14.7 with zero ego correction at about 11-12v. The value I used for my car works well for me, but it might be different on your car due to having different injectors.

3. In the overrun fuel cut I originally had some settings that would cause the car to stall when driving with AC on. I adjusted the settings to the new values in your tune.

4. in the Ignition Options menu there is a setting for Hardware Spark Latency. You need to tune this specifically to your car. Set the ignition timing to FIXED timing @ 15 degress. Use a timing light to set your base timing. Then while still in that mode, rev the engine up and hold the rpm while watching the timing light. If your timing drifts down from 15 degress, adjust the hardware spark latency until it is steady through the rev range. On my car I found a value of about 190 worked well, however your car might not need this setting and having 190 in that field could potentially cause your engine to run too much timing advance.

5. I loaded up the 3sgte base Ignition map into your tune and took out a few degrees due to it being a high compression motor. The map should work okay on the 5sfe, but you should really have this tuned on a load bearing dyno (not a basic Dynojet). I have never seen a 5sfe timing map so its all just guess work.

6. I use a J&S Safeguard for knock detection because the built in knock control is not that great on the diypnp. However someone on mr2oc posted about the settings that he used when setting his up.

7. As you know, you really need to tune the VE table using the autotune feature in Tunerstudio. The values that you have in there right now are far from correct and will cause all kinds of stalling issues as the engine lacks fuel in certain cells where it comes back down to idle.

This post has been edited by lagos: Aug 17, 2016 - 12:10 AM

[HardHead93]

I updated your tune file with some new settings and emailed it back to you. I have a few comments.

1. What injectors are you using? Are they 460cc rx7 red injectors? If so, I believe those are commonly used in Miats and the correct dead time (lag time) might be around 1.2. You might want to google search to see if you can find an exact value.

2. Injector battery voltage correction:
After you input the correct dead time and tune the fuel map in the idle cells to 14.7, disconnect the oval plug from your alternator while the car is running. Then watch the ego correction gauge and adjust that battery correction factor so that your idle is still 14.7 with zero ego correction at about 11-12v. The value I used for my car works well for me, but it might be different on your car due to having different injectors.

3. In the overrun fuel cut I originally had some settings that would cause the car to stall when driving with AC on. I adjusted the settings to the new values in your tune.

4. in the Ignition Options menu there is a setting for Hardware Spark Latency. You need to tune this specifically to your car. Set the ignition timing to FIXED timing @ 15 degress. Use a timing light to set your base timing. Then while still in that mode, rev the engine up and hold the rpm while watching the timing light. If your timing drifts down from 15 degress, adjust the hardware spark latency until it is steady through the rev range. On my car I found a value of about 190 worked well, however your car might not need this setting and having 190 in that field could potentially cause your engine to run too much timing advance.

5. I loaded up the 3sgte base Ignition map into your tune and took out a few degrees due to it being a high compression motor. The map should work okay on the 5sfe, but you should really have this tuned on a load bearing dyno (not a basic Dynojet). I have never seen a 5sfe timing map so its all just guess work.

6. I use a J&S Safeguard for knock detection because the built in knock control is not that great on the diypnp. However someone on mr2oc posted about the settings that he used when setting his up.

7. As you know, you really need to tune the VE table using the autotune feature in Tunerstudio. The values that you have in there right now are far from correct and will cause all kinds of stalling issues as the engine lacks fuel in certain cells where it comes back down to idle.

Thanks for all the help! I went and found the injector dead time for the 460cc RX7 injectors that I am using and got the following values:

1.185 @ 14.4V or 1.2 @13.4V

I enriched a couple of cells around the idle and plan to do the autotune and adjust any timing drift this weekend. As for setting up the stock knock sensor, DIYAUTOTUNE provided me with the following information:

There's not much adjustment here - you'll just want to adjust the sensitivity trim pot to the point where it JUST won't pick up knock on a safe tune.

For settings in TunerStudio, see this link.

http://www.msextra.com/doc/pdf/html/Megasq...ce-3.4-110.html