Volvo 850 2.5 B5252S 'P' Reg 1996

Dec 8th, 2005, 13:30

Can any one help? My car won't start and only produces one pulse to the injectors (which allows it to run upto 1500rpm then cut straight out)I have changed the camshaft, crankshaft and ambient sensors and it still won't start.
Has any one got any idea's or could you point me in the right direction for a wiring circuit?

Dec 8th, 2005, 14:34

Hi

Will it run on wide open throttle?

Try cleaning the throttle body. And Idle valve.

Check for any loose broken vacuum hoses.

Disconnect the Maf sensor, if the motor runs albeit poorly then this is the fault.

Hope this helps
Matt

sholtby · Dec 8th, 2005, 17:31

Is the engine (lambda) warning light on? If so you need to pull the fault codes.
A common fault is the fuel pump relay.

Simon

Dec 8th, 2005, 20:09

How on earth can it rev to 1.5K on one injector pulse?

TT

Chris_Rogers · Dec 8th, 2005, 20:14

I would suspect the immobilizer.

Try disconnecting the connection to the antenna ring round the ign lock barrel, cleaning the contacts and reconnecting it.

A look with a fault code reader would help identify the problem.

Dec 10th, 2005, 09:08

Take of the cap on the fule rail preasure testpoint. Check you have fule preasure.

If not the fule pump relay seems to be a common culprit, bridge the POWER terminals to test.

TT

Dec 8th, 2005, 13:30	#1
wanttoburnthe Guest Location:	Volvo 850 2.5 B5252S 'P' Reg 1996 Can any one help? My car won't start and only produces one pulse to the injectors (which allows it to run upto 1500rpm then cut straight out)I have changed the camshaft, crankshaft and ambient sensors and it still won't start. Has any one got any idea's or could you point me in the right direction for a wiring circuit?

Dec 8th, 2005, 14:34	#2
Matt 850 GLT Guest Location:	RE: Volvo 850 2.5 B5252S 'P' Reg 1996 Hi Will it run on wide open throttle? Try cleaning the throttle body. And Idle valve. Check for any loose broken vacuum hoses. Disconnect the Maf sensor, if the motor runs albeit poorly then this is the fault. Hope this helps Matt

Dec 8th, 2005, 17:31	#3
sholtby Premier Member Last Online: May 26th, 2010 20:17 Join Date: Dec 2002 Location: north east	RE: Volvo 850 2.5 B5252S 'P' Reg 1996 Is the engine (lambda) warning light on? If so you need to pull the fault codes. A common fault is the fuel pump relay. Simon

Dec 8th, 2005, 20:09	#4
twinturbo Guest Location:	RE: Volvo 850 2.5 B5252S 'P' Reg 1996 How on earth can it rev to 1.5K on one injector pulse? TT

Dec 8th, 2005, 20:14	#5
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	RE: Volvo 850 2.5 B5252S 'P' Reg 1996 I would suspect the immobilizer. Try disconnecting the connection to the antenna ring round the ign lock barrel, cleaning the contacts and reconnecting it. A look with a fault code reader would help identify the problem.

Dec 10th, 2005, 09:08	#6
twinturbo Guest Location:	RE: Volvo 850 2.5 B5252S 'P' Reg 1996 Take of the cap on the fule rail preasure testpoint. Check you have fule preasure. If not the fule pump relay seems to be a common culprit, bridge the POWER terminals to test. TT

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