Kevin Doe
October 9th, 2007, 01:05 PM
Hello all, I've got EFI Live, and I'm trying to tune my car. My modifications are as follows.
MS4 cam, 1 7/8" long tube headers with 3" collectors, 3" true dual exhaust through an X pipe then into two straight through mufflers, dual 3.5" intake to a single 4" right at the throttle body, no MAF, LS6 intake manifold. The engine is from a 2004 GTO.
With EFI Live, I made it run in open loop speed density. I was going to do the auto VE tuning. I also had to have it in speed density mode since no MAF. I have the stock configurations, other than these changes. I have tried several VE maps, stock, stock with mulitpliers, and one from a car with a similar cam.
Here is what I'm experiencing. Cold startup, starts ok, usually requires two cranks. Idles decent. Almost exactly 14.6 AFR. Timing jumps around, between 8 degrees or so, and 25 degrees or so. It seems to be every 0.1 seconds it switches. The car will idle up to operating temperature and run ok. If I shut the car off, it will not idle at all w/o my foot on the gas. I have to wait for it to get totally cold before I can start it again. I have done some idle modifications to the desired airflow at idle table. I added 1.0 to almost every temp during the warm up phase. I did this because I logged a touch over 2.0 during the RAFIG process with EFI Live. I have since logged the RAFIG again, and it still says a touch over 2.0. The IAC steps are ~135 warm. When I try to restart the car warm/hot, I hear a lot of noise from the intake area, the rpms drop to about 400, and see the IAC steps go up to about 250, then it stalls out.
The car will not accept any throttle. Any amount of throttle will stall it out. I understand hot to preform the auto VE tuning using the BEN factor, however the car in its current state is not drivable. I see approximatly 71 kPa MAP at idle.
Can anyone point me in the right direction as far as how to get it drivable so I can at least begin to do some VE mapping.
This is the car its in. Its my build thread from a V8 RX7 forum. Its very long, and have hundreds upon hundreds of pics of my extensive build.
http://www.v8rx7forum.com/v8-rx7-technical/40258-ls1-fd-progress-not-using-kit-56k-no.html
Thanks in advance,
Kevin
MS4 cam, 1 7/8" long tube headers with 3" collectors, 3" true dual exhaust through an X pipe then into two straight through mufflers, dual 3.5" intake to a single 4" right at the throttle body, no MAF, LS6 intake manifold. The engine is from a 2004 GTO.
With EFI Live, I made it run in open loop speed density. I was going to do the auto VE tuning. I also had to have it in speed density mode since no MAF. I have the stock configurations, other than these changes. I have tried several VE maps, stock, stock with mulitpliers, and one from a car with a similar cam.
Here is what I'm experiencing. Cold startup, starts ok, usually requires two cranks. Idles decent. Almost exactly 14.6 AFR. Timing jumps around, between 8 degrees or so, and 25 degrees or so. It seems to be every 0.1 seconds it switches. The car will idle up to operating temperature and run ok. If I shut the car off, it will not idle at all w/o my foot on the gas. I have to wait for it to get totally cold before I can start it again. I have done some idle modifications to the desired airflow at idle table. I added 1.0 to almost every temp during the warm up phase. I did this because I logged a touch over 2.0 during the RAFIG process with EFI Live. I have since logged the RAFIG again, and it still says a touch over 2.0. The IAC steps are ~135 warm. When I try to restart the car warm/hot, I hear a lot of noise from the intake area, the rpms drop to about 400, and see the IAC steps go up to about 250, then it stalls out.
The car will not accept any throttle. Any amount of throttle will stall it out. I understand hot to preform the auto VE tuning using the BEN factor, however the car in its current state is not drivable. I see approximatly 71 kPa MAP at idle.
Can anyone point me in the right direction as far as how to get it drivable so I can at least begin to do some VE mapping.
This is the car its in. Its my build thread from a V8 RX7 forum. Its very long, and have hundreds upon hundreds of pics of my extensive build.
http://www.v8rx7forum.com/v8-rx7-technical/40258-ls1-fd-progress-not-using-kit-56k-no.html
Thanks in advance,
Kevin