7 weeks and still no start

Patjamison · 23rd December 2010, 09:57

Car has always worked well for the past 4 years, 7 weeks ago it just would'nt start, RAC called said it was a fuel issue. Taken to local garage, Pre fuel indicated on computer test. they checked the pumps all working, its the new version 350 pump in the rear seat, Sure start starts the car for as long as its there then stops. Injectors removed for bench testing they are OK, ECU removed and sent to UK specialist, 4 faults found but none relating to No start. Refitted still no start. Camsensor replaced - no effect. Additional inline pressure pump fitted to boast fuel delivery but no difference. Rev counter moves with turn over so we believe the Crankshaft sensor is fine.
Garage is now at a loss, does anyone know the voltages at the injectors or pre and post pressures of the high pressure pump incase we can rig something up, we seem to be changing items for the sake of it now and its getting expensive. Any help greatly appreciated.

PaT

HarryM1BYT · 23rd December 2010, 10:17

Just a wild guess on this and ready to be shot down - As it doesn't seem to be getting any fuel injected, I wonder if it might be the fuel pressure sensor? Not sure if the ECU will revert to default values to allow the engine to limp, if that were to be simply unplugged.

BTW - You seem to have your phone number as your signature, not really a good idea.

Patjamison · 23rd December 2010, 10:45

Quote:

Originally Posted by HarryM1BYT

Just a wild guess on this and ready to be shot down - As it doesn't seem to be getting any fuel injected, I wonder if it might be the fuel pressure sensor? Not sure if the ECU will revert to default values to allow the engine to limp, if that were to be simply unplugged.

BTW - You seem to have your phone number as your signature, not really a good idea.

Harry

Yea sorry if thats the valve on the end of the High pressure pump they swopped it over but made no difference.
I removed the mobile number thanks

WeeMan · 23rd December 2010, 10:52

Have you tried the inertia switch?. Located on the A-pillar beside fuse box, rubber button on top to press and reset, also check wires tight going in.

Lovel · 23rd December 2010, 11:43

Quote:

Originally Posted by Patjamison

Harry

Yea sorry if thats the valve on the end of the High pressure pump they swopped it over but made no difference.
I removed the mobile number thanks

Worth a stab, pardon the pun. Drift this inlet line and observe for movement of the check valve in the HP pump.
There is a very light weight spring fitted underneath the check valve and piston can stick, and when it does your car will never start because the ECU is not getting a signal from the pressure sensor on the fuel rail.

Patjamison · 23rd December 2010, 11:54

tHANKS I WILL TRY THAT AND GET BACK, JUST TESTED THE LINE PRESSURE TO THE HIGH PRESSURE PUMP AND ITS ONE AND A HALF BAR AS IT SHOULD BE. nOT THE FUEL PUMPS THEN.

topman · 23rd December 2010, 14:43

I think Lovel is on the best track, try and find out what the inputs are into the ecu for a start. Then check that it is receiving the required signals to it.

chrissyboy · 23rd December 2010, 16:48

it sounds as if it is immobilised.. haveyou tried opning drivers window ock car with fob ,open car and try then ... faiking that have you checked fuses and relating to fuel pumps and the fuel pump relay ...

wuzerk · 23rd December 2010, 17:27

If it helps:
FUEL RAIL PRESSURE SENSOR READINGS....WITH IT PLUGGED IN.
WHITE/YELLOW........5.0V
BLUE/BLACK..............1.3V (at tickover)
BROWN/GREEN...........0.0V

Another quick voltage check: On the FUEL FILTER the Yellow/Blue wire should read around 4V at all times.
EDIT: Rover Rons tip is that if the car starts and runs as long as easy start is present it may suggest Camshaft sensor
but, once started that sensor is not used so it should keep running. That leaves the Crankshaft Sensor?

Did you perform any jobs on the car before it failed to start?

chrissyboy · 24th December 2010, 07:48

i thought the cam sensor was in constant use as follows

camshaft position sensor is used to help the PCM (powertrain control module) determine the correct firing order. The engine will not run without this sensor's input. The camshaft position sensor is a Hall effect sensor. The Hall effect type of cam sensor uses notches or shutter blades on the cam gear or balancer to disrupt a magnetic field in the Hall effect sensor window. This causes the sensor to switch on and off, producing a digital signal or Hall-effect signal to the PCM that it uses to determine when #1 cylinder comes up on top-dead center (TDC). This sensor information is used to phase the sequential firing of the fuel injectors during normal SFI operation.

23rd December 2010, 10:17	#2
HarryM1BYT This is my second home 75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010 Location: Leeds Posts: 17,273 Thanks: 2,160 Thanked 2,061 Times in 1,586 Posts	Just a wild guess on this and ready to be shot down - As it doesn't seem to be getting any fuel injected, I wonder if it might be the fuel pressure sensor? Not sure if the ECU will revert to default values to allow the engine to limp, if that were to be simply unplugged. BTW - You seem to have your phone number as your signature, not really a good idea. __________________ Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money.

23rd December 2010, 10:52	#4
WeeMan Posted a thing or two Mazda MX5, BMW 520i Join Date: Feb 2007 Location: Sunny Ayrshire Posts: 1,498 Thanks: 2 Thanked 4 Times in 4 Posts	Have you tried the inertia switch?. Located on the A-pillar beside fuse box, rubber button on top to press and reset, also check wires tight going in. __________________ http://www.sloganizer.net/en/style8,ZTT.png

23rd December 2010, 16:48	#8
chrissyboy This is my second home lovely little ford focus. Join Date: Jul 2009 Location: East Dulwich Posts: 7,877 Thanks: 2 Thanked 82 Times in 68 Posts	it sounds as if it is immobilised.. haveyou tried opning drivers window ock car with fob ,open car and try then ... faiking that have you checked fuses and relating to fuel pumps and the fuel pump relay ... __________________ [ I'm really confused. -I keep dreaming I'm an insomniac

23rd December 2010, 17:27	#9
wuzerk Passed Away Rover 75 CDT 03 auto Conn. SE Join Date: May 2009 Location: London Posts: 2,885 Thanks: 104 Thanked 254 Times in 204 Posts	No start If it helps: FUEL RAIL PRESSURE SENSOR READINGS....WITH IT PLUGGED IN. WHITE/YELLOW........5.0V BLUE/BLACK..............1.3V (at tickover) BROWN/GREEN...........0.0V Another quick voltage check: On the FUEL FILTER the Yellow/Blue wire should read around 4V at all times. EDIT: Rover Rons tip is that if the car starts and runs as long as easy start is present it may suggest Camshaft sensor but, once started that sensor is not used so it should keep running. That leaves the Crankshaft Sensor? Did you perform any jobs on the car before it failed to start? Last edited by wuzerk; 23rd December 2010 at 18:50..

24th December 2010, 07:48	#10
chrissyboy This is my second home lovely little ford focus. Join Date: Jul 2009 Location: East Dulwich Posts: 7,877 Thanks: 2 Thanked 82 Times in 68 Posts	i thought the cam sensor was in constant use as follows camshaft position sensor is used to help the PCM (powertrain control module) determine the correct firing order. The engine will not run without this sensor's input. The camshaft position sensor is a Hall effect sensor. The Hall effect type of cam sensor uses notches or shutter blades on the cam gear or balancer to disrupt a magnetic field in the Hall effect sensor window. This causes the sensor to switch on and off, producing a digital signal or Hall-effect signal to the PCM that it uses to determine when #1 cylinder comes up on top-dead center (TDC). This sensor information is used to phase the sequential firing of the fuel injectors during normal SFI operation. __________________ [ I'm really confused. -I keep dreaming I'm an insomniac

23rd December 2010, 09:57	#1
Patjamison Newbie 75 CON-SEUR CDTI tourer Join Date: Dec 2010 Location: Belfast Posts: 15 Thanks: 0 Thanked 0 Times in 0 Posts	7 weeks and still no start Car has always worked well for the past 4 years, 7 weeks ago it just would'nt start, RAC called said it was a fuel issue. Taken to local garage, Pre fuel indicated on computer test. they checked the pumps all working, its the new version 350 pump in the rear seat, Sure start starts the car for as long as its there then stops. Injectors removed for bench testing they are OK, ECU removed and sent to UK specialist, 4 faults found but none relating to No start. Refitted still no start. Camsensor replaced - no effect. Additional inline pressure pump fitted to boast fuel delivery but no difference. Rev counter moves with turn over so we believe the Crankshaft sensor is fine. Garage is now at a loss, does anyone know the voltages at the injectors or pre and post pressures of the high pressure pump incase we can rig something up, we seem to be changing items for the sake of it now and its getting expensive. Any help greatly appreciated. PaT Last edited by Patjamison; 23rd December 2010 at 10:42..

23rd December 2010, 11:54	#6
Patjamison Newbie 75 CON-SEUR CDTI tourer Join Date: Dec 2010 Location: Belfast Posts: 15 Thanks: 0 Thanked 0 Times in 0 Posts	tHANKS I WILL TRY THAT AND GET BACK, JUST TESTED THE LINE PRESSURE TO THE HIGH PRESSURE PUMP AND ITS ONE AND A HALF BAR AS IT SHOULD BE. nOT THE FUEL PUMPS THEN.

23rd December 2010, 14:43	#7
topman This is my second home MG ZT-T 190 Join Date: Jun 2009 Location: Lincolnshire Posts: 5,493 Thanks: 372 Thanked 647 Times in 534 Posts	I think Lovel is on the best track, try and find out what the inputs are into the ecu for a start. Then check that it is receiving the required signals to it.