Volvo S70 T5 Turbo
Motronic 4.4 Ecu 19T 21psi cca 340Le
Engine: B5244T LPT 9:0:1
S60R Fuel injectors 42lb
Walbro 255 Lph pump
New Project: 1998 Volvo S70
Engine: B5245T3 LPT 9:0:1
Siemens Deka 630
Walbro 255 Lph pump
Borg Warner 5329
Volvo T5 COP's Bosch 0221604001
Inline 5-cylinder, sequential ignition with camsync
Primary trigger: 60-2 w/ VR sensor.
Secondary trigger: Single tooth w/ Hall sensor.
The rising edge of the cam wheel hits the sensor after cylinder three fires and before cylinder one does.
Firing order is 1-2-4-5-3.
Ign. outputs will connect as follows (for 2+6 igbt configuration, + PNP transistor
- cyl 1, EC36/34
- cyl 2, EC36/35
- cyl 4, EC36/33
- cyl 5, EC36/36
- cyl 3, EC36/24
TPS is standard Volvo S70 , 3 pin.
-Standart Vr sensor 2 pin
-Hall sensor 3 pin
-Bmw Mat sensor
-2 Bosch Lamda
Coil pin-out:S70 T5 Cop
2 Not Used
ign TDC-delay (primary trigger settings) is too low !
- ign-tdcdelay = 20 is wrong....
Correction hint: 144+20=164 crankdeg = 15*6 + 74
- first trigger tooth should be 15
- "TDC after the trigger": ign tdcdelay = 74 crankdeg
- of course, rotate ignoutputs by 1 to match the desired spark position
- verify by strobe
Validation shows possible problem
- sectrig HALL-dirac filter: preferrably disable it !
- iac ignadv change should be lower (+2, -6 crankdeg or similar; even +1 -3 or crankdeg is more than enough is IAC air-valve is set up properly, +0 -0 should be good too)
With hall dirac filter the problem shows less times
We applied some changes to the config, because "TDC after trigger" = 20 crankdeg is not a good setting (see above ... Since we changed 144 crankdegrees, you might need to rotate the ignoutput sequence by 1 event, strobing will show it).
After that, we benchtested the config.
We benchtested the ~160 kPa and 3000 .. 7000 RPM range most extensively where your cylinder seems to misfire. The ignition and injection outputs fired properly.
could you please take a look on my log file?
On WOT runs from 1st to 4th everything is fine, but in 5th gear @ 3000 rpm the engine misfires => lambda goes lean (this is a consequence of misfire: unburnt oxygen in the exhaust), stutters.
- Ignition is not strong enough. Ign current (peak current, or average current, RPM and dwell) should be measured.
- maybe longer dwell (possibly in function of MAP, see dwell_map in ignition settings) can fix it (or burn the ignition coil).
- check individual-power (if it's just 1 cyl or multiple cylinders)
The other problem is the startup. Doesn't matter if the engine is hot or cold I have to crank the for a long time to start. What could be the problem?
- it can be ... almost anything. If trigger is good (RPM shows up properly), than ... Either air, but more likely fuel or spark.
- Needs experimenting and tuning (if you find values that result in improvement, save the log or config and take note of fuel pw).