Need help with tune
Need help with tune
Hi. I k-swapped a 1966 Datsun roadster.
It is a JDM K24a with RBB head and a Kpower intake. The header is custom made with 1 3/4 primaries and 2 1/4 exhaust. Kpro v4 non type s (pnd?) ecu.
If I load a pnd stock tune, it will not start at all. If I load a TSX tune from the list, it will start and run poorly. I mistakenly bought a 4 Bar MAP, but I am not boosted so I should have bought a 1 Bar MAP. If I set my tune to the parameters of the 4 bar map, it will run worse and die. If I tell it there is a stock MAP, it runs better.
Lots of black smoke and idle and low rpm. It cleans up in the midrange. in higher RPM the engine will just quit.
Here is the tune that I had the best luck with.
Here are a few of the datalogs
One tune had the A/F at 14.x and another had it at 11.x. Stock injectors. The injector figure in ms is always in the red at approx 22ms.
The local tuner is ghosting me and even if I wanted to tow the car 3 hours away, those tuners also have not returned my call.
Let me know if you would like to see other datalogs that I pulled.
Thanks for your help.
Rob
It is a JDM K24a with RBB head and a Kpower intake. The header is custom made with 1 3/4 primaries and 2 1/4 exhaust. Kpro v4 non type s (pnd?) ecu.
If I load a pnd stock tune, it will not start at all. If I load a TSX tune from the list, it will start and run poorly. I mistakenly bought a 4 Bar MAP, but I am not boosted so I should have bought a 1 Bar MAP. If I set my tune to the parameters of the 4 bar map, it will run worse and die. If I tell it there is a stock MAP, it runs better.
Lots of black smoke and idle and low rpm. It cleans up in the midrange. in higher RPM the engine will just quit.
Here is the tune that I had the best luck with.
Here are a few of the datalogs
One tune had the A/F at 14.x and another had it at 11.x. Stock injectors. The injector figure in ms is always in the red at approx 22ms.
The local tuner is ghosting me and even if I wanted to tow the car 3 hours away, those tuners also have not returned my call.
Let me know if you would like to see other datalogs that I pulled.
Thanks for your help.
Rob
Re: Need help with tune
Also, I don't have access to another car to try this ecu/tune in.
Re: Need help with tune
Update:
I bought a 1 bar MAP sensor and changed the spark plugs.
This is a new datalog...
When driving the car, there is quite a bit of smoke from the exhaust still. When holding maintenance throttle i.e. staying at 30mph, the car burbles and is not smooth.
When letting off of the throttle, the car will sometimes give you throttle for about a second or more. Also, I cant go past about 2/3 throttle or it stumbles, cuts out and sometimes backfires.
While it runs better than the last datalog it still has some issues.
Thanks.
I bought a 1 bar MAP sensor and changed the spark plugs.
This is a new datalog...
When driving the car, there is quite a bit of smoke from the exhaust still. When holding maintenance throttle i.e. staying at 30mph, the car burbles and is not smooth.
When letting off of the throttle, the car will sometimes give you throttle for about a second or more. Also, I cant go past about 2/3 throttle or it stumbles, cuts out and sometimes backfires.
While it runs better than the last datalog it still has some issues.
Thanks.
Re: Need help with tune
In the last datalog, the data appears to be frozen and is not moving.
Re: Need help with tune
Strange.
I just checked the source file and it is the same way.
Next time I drive it I will get a longer data log session.
Thanks
I just checked the source file and it is the same way.
Next time I drive it I will get a longer data log session.
Thanks
- CalibratEd
- Posts: 1430
- Joined: Fri Feb 07, 2020 3:20 pm
Re: Need help with tune
I can help you out once you figure out the datalog freezing issue. The other datalogs worked. Also, you will need to log the car longer than what you posted. The basemaps are a good start but will always need work.
-Ed
-Ed
Re: Need help with tune
Yeah. Will do.
Not sure why the injectors are always in the red at about 20ms. Not sure why it cuts out at about 2/3 throttle. Hopefully I can get an updated log tomorrow.
Thanks for the help. I appreciate it.
Not sure why the injectors are always in the red at about 20ms. Not sure why it cuts out at about 2/3 throttle. Hopefully I can get an updated log tomorrow.
Thanks for the help. I appreciate it.
- CalibratEd
- Posts: 1430
- Joined: Fri Feb 07, 2020 3:20 pm
Re: Need help with tune
Ok.
Drove it today.
This is the calibration file:
And this is driving it around the block:
Drove it today.
This is the calibration file:
And this is driving it around the block:
Re: Need help with tune
I think those files are out of order on my last post.
I also drove it down the street but my datalog file is 600k over the 10mb limit so I can't upload it.
When I drove it down the street, it died when I was slowing down for the traffic light. I let the clutch out in second gear and it restarted but died again as I was going through the intersection. I pulled over and tried to start it a few times, then it started and stayed running so I drove it back. If I can find a way to shorten that file I will post it up here.
Thanks.
I also drove it down the street but my datalog file is 600k over the 10mb limit so I can't upload it.
When I drove it down the street, it died when I was slowing down for the traffic light. I let the clutch out in second gear and it restarted but died again as I was going through the intersection. I pulled over and tried to start it a few times, then it started and stayed running so I drove it back. If I can find a way to shorten that file I will post it up here.
Thanks.
Re: Need help with tune
I have an error message for the vtec oil pressure switch. The engine is a JDM K24 so it does not have a vtec oil pressure switch
- CalibratEd
- Posts: 1430
- Joined: Fri Feb 07, 2020 3:20 pm
Re: Need help with tune
Open the datalog in KManager, on the timeline right click about 15-20 minutes into the datalog and select "set new end". Save it with a new file name and upload it.Dirtypool wrote: ↑Wed Jun 16, 2021 5:56 pm I think those files are out of order on my last post.
I also drove it down the street but my datalog file is 600k over the 10mb limit so I can't upload it.
When I drove it down the street, it died when I was slowing down for the traffic light. I let the clutch out in second gear and it restarted but died again as I was going through the intersection. I pulled over and tried to start it a few times, then it started and stayed running so I drove it back. If I can find a way to shorten that file I will post it up here.
Thanks.
It looks like you need to start with a good base tune and then dial it in. I would like to see the datalog where you drove it on the street. The most recent datalog is the car warming up at idle.
-Ed
- CalibratEd
- Posts: 1430
- Joined: Fri Feb 07, 2020 3:20 pm
Re: Need help with tune
Thank you.
Shortened version.
Shortened version.
Re: Need help with tune
The first minute of that datalog was warm up and backing out of garage. Then I drove around the block. You can see the rough running maintenance throttle i.e. holding at 30mph.CalibratEd wrote: ↑Wed Jun 16, 2021 8:00 pmOpen the datalog in KManager, on the timeline right click about 15-20 minutes into the datalog and select "set new end". Save it with a new file name and upload it.Dirtypool wrote: ↑Wed Jun 16, 2021 5:56 pm I think those files are out of order on my last post.
I also drove it down the street but my datalog file is 600k over the 10mb limit so I can't upload it.
When I drove it down the street, it died when I was slowing down for the traffic light. I let the clutch out in second gear and it restarted but died again as I was going through the intersection. I pulled over and tried to start it a few times, then it started and stayed running so I drove it back. If I can find a way to shorten that file I will post it up here.
Thanks.
It looks like you need to start with a good base tune and then dial it in. I would like to see the datalog where you drove it on the street. The most recent datalog is the car warming up at idle.
-Ed
I don't have anything hooked up to the vss so it won't show speed.