93xsg
10+ Year Contributor
- 245
- 55
- Jul 3, 2011
-
Sequim,
Washington
Alrighty guys,
I've almost got my new 2.4l g4cs build to idle on its own. Car is same setup that worked before, save for a completely new engine top and bottom. All accessories, turbo, throttle body etc is the same.
Anywho last time around, I fixed all the mechanical issues like boost leaks, exhaust leaks etc and the car idled, and I was then able to set ignition timing and the airflow/rev with the throttle body.
This go around, I've spent months fixing boost leaks, exhaust leaks, etc and it's sooooooo close it idling on its own. But she won't stay running on its own without gas input for more that 3-5 seconds or so. Its ran better and better with each fix.
I know what to do once it runs just could use some help!
I recently found a random post to change loadfactor from 100% to 83% for the 2.4l and that helped a lot. I'm hoping there is something else I'm missing that's easy.
Log ATTACHED
Car
1993 Eagle Talon TSI AWD 5 SPD
20g turbo, External Tial gate, ported 2g mani
950 FIC at 43.5psi, set with aeromotive afpr, hardwired external pump, fuel cell
2g MAF with OHM conversion cable, FMIC, greddy BOV
S90 no ISC or FIAV with chinese SMIM
2.4l G4CS, 9.0:1 compression, forged rods/pistons, girdle, ARPS
Ported/polished head, oversize valves, 272s, beehives
ECMLINK, PLX Wideband tapped into EGR
1). No boost, vac, or exhaust leaks.
Test up to 15 psi on my boost gauge, no hisses or air
2). Verify mechanical timing.
2.4l g4cs with the long 4g64 belt. Set to the 3rd option on the post linked below in my response. (post #3 on this thread)
3). Verify base timing
Haven't been able to get it to idle for this
4). Ignition system
New ngks gapped at 0.28, spark on all 4 is healthy
5). Motor health
Compression was 145psi all 4 cylinders but the battery was weak that day and cranking slow.
Leak down test 72psi down to 70psi consistent all 4 cylinders
6). Basic throttle body adjustments.
s90 throttle body with no ISC and no FIAV.
I can't get her to idle yet, so I haven't been able to do this fully
7). Compression ratio
2.4l stroker with 9.0:1 wiseco 4g64/4g63 head pistons
8). Wiring and sensors
Nothing unusual here
9). No DTC/CEL codes
Nothing on ECMLINK
10). Electrical system
New battery and alternator works
11). Base fuel pressure and injector values
43.5psi
950cc FIC
I used ECM calculator built in and looked up the deadtime value
12). Properly calibrated and configured wideband sensor
PLX in the EGR spot, it worked as it should for narrowband and closed loop on last motor
13). Type of fuel
92 octane chevron
14). ECMlink how-to videos
yessirrr
I've almost got my new 2.4l g4cs build to idle on its own. Car is same setup that worked before, save for a completely new engine top and bottom. All accessories, turbo, throttle body etc is the same.
Anywho last time around, I fixed all the mechanical issues like boost leaks, exhaust leaks etc and the car idled, and I was then able to set ignition timing and the airflow/rev with the throttle body.
This go around, I've spent months fixing boost leaks, exhaust leaks, etc and it's sooooooo close it idling on its own. But she won't stay running on its own without gas input for more that 3-5 seconds or so. Its ran better and better with each fix.
I know what to do once it runs just could use some help!
I recently found a random post to change loadfactor from 100% to 83% for the 2.4l and that helped a lot. I'm hoping there is something else I'm missing that's easy.
Log ATTACHED
Car
1993 Eagle Talon TSI AWD 5 SPD
20g turbo, External Tial gate, ported 2g mani
950 FIC at 43.5psi, set with aeromotive afpr, hardwired external pump, fuel cell
2g MAF with OHM conversion cable, FMIC, greddy BOV
S90 no ISC or FIAV with chinese SMIM
2.4l G4CS, 9.0:1 compression, forged rods/pistons, girdle, ARPS
Ported/polished head, oversize valves, 272s, beehives
ECMLINK, PLX Wideband tapped into EGR
1). No boost, vac, or exhaust leaks.
Test up to 15 psi on my boost gauge, no hisses or air
2). Verify mechanical timing.
2.4l g4cs with the long 4g64 belt. Set to the 3rd option on the post linked below in my response. (post #3 on this thread)
3). Verify base timing
Haven't been able to get it to idle for this
4). Ignition system
New ngks gapped at 0.28, spark on all 4 is healthy
5). Motor health
Compression was 145psi all 4 cylinders but the battery was weak that day and cranking slow.
Leak down test 72psi down to 70psi consistent all 4 cylinders
6). Basic throttle body adjustments.
s90 throttle body with no ISC and no FIAV.
I can't get her to idle yet, so I haven't been able to do this fully
7). Compression ratio
2.4l stroker with 9.0:1 wiseco 4g64/4g63 head pistons
8). Wiring and sensors
Nothing unusual here
9). No DTC/CEL codes
Nothing on ECMLINK
10). Electrical system
New battery and alternator works
11). Base fuel pressure and injector values
43.5psi
950cc FIC
I used ECM calculator built in and looked up the deadtime value
12). Properly calibrated and configured wideband sensor
PLX in the EGR spot, it worked as it should for narrowband and closed loop on last motor
13). Type of fuel
92 octane chevron
14). ECMlink how-to videos
yessirrr
Last edited:
(the post I linked to) 
I'm happy if that helped you.
