Hy everyone and thank you for existence of this forum.
I have an issue for 2 months now and still cannot sort it out.
Car was running and driving perfect in the last couple of years but unfortunately didn't have the time drive it regularly started to have this problem.
Starting then cutting off after couple of seconds.
Started to investigate the problem:
1. Fuel pump wasn't priming so no fuel coming.
Find out (saw as common problem), fuel pump and pipe inside fuel tank corroded and pump dead.
Replaced the pipe and fuel pump with aftermarket fuel pump.
2. Replaced fuel pump relay, fuses and fuel filter.
3. Pump is working and fuel coming in the fuel ramp.
4. Replaced throttle sensor and Idle control valve with original Bosch one, Replaced the fuel pressure regulator and still same problem.
Car starts and runs just if maf sensor, lambda sensor and throttle sensor disconnected. Managed even to rev it up slowly with those sensors disconnected. As soon as I start connecting the throttle sensor still runs but like firemissing and cannot rev it up. If I try to connect the maf sensor it cuts off immediately.
Run the Delphi and multiscan diagnostic scanners and only error was maf sensor and lambda sensor as they are disconnected. If I connect them back, put the ignition on without trying to start and clear the fault error codes it does cleand shows no error but the car doesn't start.
Replaced the maf sensor with Bosch original one but still no luck. Maf is ok as i can see values are appropriate ( air need it and air delivered).
Checked the voltage and resistance of sensors, injectors, coils. All ok but still not running.
Checked for vaccum leaks and all are OK.
When sensors are disconnected the only light on dashboard is the injector light which I think is normal to be one as have the few sensors disconnected.
Under the steering wheel where is the fuse panel with relays I take it out and clean the pins as oxidation was present. I noticed under this fuse panel further is this unit in the attached picture that I presume is the alarm module which was making a ticking noise and red light button intermittent in the console near the rear defrost windscreen button. I disconnected all the cables running into this and ticking noise stopped and red light disappeared. Is not making instead and difference. Is this unit related to immobiliser or is the alarm unit?
Checked already the inertial switch, yellow connector and all ok. Checked all fuses and relays and still no luck.
Checked the negative wires on chassis and cleaned them but no luck. What else should I try?
I appreciate in advance your time for reading my post and suggestions what should I check and try next.
I have an issue for 2 months now and still cannot sort it out.
Car was running and driving perfect in the last couple of years but unfortunately didn't have the time drive it regularly started to have this problem.
Starting then cutting off after couple of seconds.
Started to investigate the problem:
1. Fuel pump wasn't priming so no fuel coming.
Find out (saw as common problem), fuel pump and pipe inside fuel tank corroded and pump dead.
Replaced the pipe and fuel pump with aftermarket fuel pump.
2. Replaced fuel pump relay, fuses and fuel filter.
3. Pump is working and fuel coming in the fuel ramp.
4. Replaced throttle sensor and Idle control valve with original Bosch one, Replaced the fuel pressure regulator and still same problem.
Car starts and runs just if maf sensor, lambda sensor and throttle sensor disconnected. Managed even to rev it up slowly with those sensors disconnected. As soon as I start connecting the throttle sensor still runs but like firemissing and cannot rev it up. If I try to connect the maf sensor it cuts off immediately.
Run the Delphi and multiscan diagnostic scanners and only error was maf sensor and lambda sensor as they are disconnected. If I connect them back, put the ignition on without trying to start and clear the fault error codes it does cleand shows no error but the car doesn't start.
Replaced the maf sensor with Bosch original one but still no luck. Maf is ok as i can see values are appropriate ( air need it and air delivered).
Checked the voltage and resistance of sensors, injectors, coils. All ok but still not running.
Checked for vaccum leaks and all are OK.
When sensors are disconnected the only light on dashboard is the injector light which I think is normal to be one as have the few sensors disconnected.
Under the steering wheel where is the fuse panel with relays I take it out and clean the pins as oxidation was present. I noticed under this fuse panel further is this unit in the attached picture that I presume is the alarm module which was making a ticking noise and red light button intermittent in the console near the rear defrost windscreen button. I disconnected all the cables running into this and ticking noise stopped and red light disappeared. Is not making instead and difference. Is this unit related to immobiliser or is the alarm unit?
Checked already the inertial switch, yellow connector and all ok. Checked all fuses and relays and still no luck.
Checked the negative wires on chassis and cleaned them but no luck. What else should I try?
I appreciate in advance your time for reading my post and suggestions what should I check and try next.
- Model
- Fiat coupe 20v turbo
- Year
- 1997
