Hi Everyone
I came by a 1990 500SL which I'd like to get running. It's the CIS-E CFI M119 V8
It turns over but won't fire.
There was a Thatcham 1 immobiliser which interrupted the starter circuit. Now removed and purple wire reconnected. Car turns over.
We have fuel:
Turning key to position 2 I hear the fuel pump whirring for a second or two. There is plenty of fuel pressure.
Plenty of pressure to cold start injector.
Pushing the air metering flap down lets fuel out of the metering head to the injectors. Lots of fuel is getting through as turning the car over for a minute or so floods the spark plugs. The garage smells of petrol fumes, so it's clearly pushing fuel through
We have spark:
Pulling a plug out and shorting the plug body to the engine block produces a nice big fat spark. HT leads look to be almost new
The fuse was blown in the OVP relay, so I replaced first the fuse then the relay.
I tried a different MAS unit out of a working car.
Reading the codes with my code reader showed:
Pin 3 (CIS-E): 1 flash (no error)
Pin 8 (Distributor Ignition) 17 flashes (Crank position sensor fault)
Pin 14 (MAS engine control) 2 = fuel pump relay circuit not functioning, 3 = TN/TD RPM signal interrupted, 5 = Output for air injection pump defective and 6 = output for kickdown control defective.
I read somewhere that testing with the engine not running always gives code 17 for crank position sensor.
The fuel pump looks like it IS working since the fuel pump makes a noise as normal and there's fuel pressure.
I do not know what TN/TD RPM means.
Any ideas, anyone?
Does it look like the crank position sensor has indeed gone to meet its maker and if so, is it the one on the front of the engine by the crank pulley or the one by the flywheel by the torque converter
Any ideas appreciated
cheers
Dave
I came by a 1990 500SL which I'd like to get running. It's the CIS-E CFI M119 V8
It turns over but won't fire.
There was a Thatcham 1 immobiliser which interrupted the starter circuit. Now removed and purple wire reconnected. Car turns over.
We have fuel:
Turning key to position 2 I hear the fuel pump whirring for a second or two. There is plenty of fuel pressure.
Plenty of pressure to cold start injector.
Pushing the air metering flap down lets fuel out of the metering head to the injectors. Lots of fuel is getting through as turning the car over for a minute or so floods the spark plugs. The garage smells of petrol fumes, so it's clearly pushing fuel through
We have spark:
Pulling a plug out and shorting the plug body to the engine block produces a nice big fat spark. HT leads look to be almost new
The fuse was blown in the OVP relay, so I replaced first the fuse then the relay.
I tried a different MAS unit out of a working car.
Reading the codes with my code reader showed:
Pin 3 (CIS-E): 1 flash (no error)
Pin 8 (Distributor Ignition) 17 flashes (Crank position sensor fault)
Pin 14 (MAS engine control) 2 = fuel pump relay circuit not functioning, 3 = TN/TD RPM signal interrupted, 5 = Output for air injection pump defective and 6 = output for kickdown control defective.
I read somewhere that testing with the engine not running always gives code 17 for crank position sensor.
The fuel pump looks like it IS working since the fuel pump makes a noise as normal and there's fuel pressure.
I do not know what TN/TD RPM means.
Any ideas, anyone?
Does it look like the crank position sensor has indeed gone to meet its maker and if so, is it the one on the front of the engine by the crank pulley or the one by the flywheel by the torque converter
Any ideas appreciated
cheers
Dave