Porsche 944 turbo/Injector & Flyback ? (v3.x serialnr 731)
Due to engine failure, I had to build a new one. Found 3.0 litre 16valve Porsche 968 engine as a starting point.
Now with Carillo rods, original forged pistons, cometic 3,2 mm headgasket, wich brings C/R down to 9,5.
Garrett GT35/82R turbo.
Engine harnes has been built out of original 968 wire harnes, each injector have own wire.
Bosch wasted spark coil pack from VEMS shop.
Racetronix high Z 846cc/min injectors.
Trigger
Porsche 944 turbo trigger:
132teeth on flywheel -VR sensor
Crank home (1 pin on flywheel 24.5 tooth, ie 66.8 dec BTDC 24.5 x 2.7272 deg, if i remember right) -VR sensor.
No cam sensor
And no missing teeth anywhere!
Ignition sequence: 1-3-4-2
I.e. trigger is 132+1
VEMS: serianro 731
Power flyback
300kpa MAP
LCD&PS2
4ign Driver
Firmware 1.1.47
Have tried couple of times to start the engine, without success.
Fuel pressure ok, I get some burning, in combustion chambers, but the engine do not want to start.
Wiring has been done by using Porsche 968 engine wire harness, wich is connected to porsche 944 Turbo Engine bay and cabin connectors (very straight forward). Motronic 55 pin connector has been cut away and wires connected to EC 36 and EC 18 connectors. Few extra wires had to put. ( When I ordered VEMS the plans were others, so I did not order it with 55 pin Motronic connector)
Here is schematic of EC connectors with corresponding DME PIN.s
EC 36/ Wire colour/ Object/ DME pin/ Other
1 Gn/Re TPS signal 26 DME Maf sens wir
2 Gr/Bl IAT 33 Tank ventvalv Wi
3
4
5 GND
6 Bk/Wt ICV close 22 Flyback Diod
7 Gr/Bk Inj.1 17
8 Gr Inj.3 35
9 Boost ctrl Flyback Diod
10 Re/Bl Gn/Bl Tacho 6 22Ohm+220uH
11
12
13
14 Ye Clt sensor 47
15 Fuel pump relay ground
16
17 Re/Bl ICV open 4 Flyback Diod
18 Bl/Re Variocam 23 Flyback Diod
19 Gn/Re Inj.2 16
20 Gr/Bl Inj.4 35
21 GND
22
23
24 GND
25 Re/Gn Re/Ye Power 37 Fuse Box
26 GND
27 Br Speed sens 27 Pin 1 Connector
28
29 Ye/Re TPS +5V(1) 25 DME Maf sensor wire
30
31
32
33
34 Br/Ye Coil Pack1 New wire
35
36 Ye Coil Pack 2 New wire
EC18/ Wire colour/ Object/ DME pin/ Other
1 Wt Knoc sens 1 11
2 Shield Knock sens
3 Wt knock sens2 29
4
5
6
7 Br WBO2/5
8
9 Gn/Re WBO2/6
10
11
12 Br Ref sens DME 26 Pin 1 connector
13 Bl/Gr WBO2/1
14 DSUB3
15 DSUB2
16
17
18 Ye/Re WBO2/4