850 no spark and injectors not firing

eboknight · Post by **eboknight** » 27 Feb 2009, 17:23

I just wanted to sum up my previus post.
I have a 850 wagon non turbo. It has no spark and the injectors are not firing.
I have replaced the cam sensor, crank sensor, and coil. I have checked the relay by the fan shroud all conections look good, by passed the fuel relay and the fuel pressure is good. Disconnected the maf sensor no change.
It will start rarely start and run fine but when you shut it off no injectors and spark again. The only other part is the speed sensor it has started with it disconected but hooking it back up made no difference.
Any other sudgestions would be very appreciated.

Post by **MadeInJapan** » 27 Feb 2009, 20:37

Do you get any trouble codes?

eboknight · Post by **eboknight** » 28 Feb 2009, 18:53

Sorry no tester, looking to borrow one and if not buy one shortly. If it would start I would run it into autozone and have them test it but its been 3 days since it would start for me.
Will the speed sensor shoot any voltage while the car is just cranking and do you think this is possibly the problem.

Post by **Ozark Lee** » 28 Feb 2009, 20:44

Will the speed sensor shoot any voltage while the car is just cranking and do you think this is possibly the problem.

The best way to look at it is with an oscilloscope but most folks don't seem to have one laying around in their garage (I do). If you set the voltage scale to a low voltage and A/C volts you should get a reading when you crank the car.

...Lee

Post by **JDS60R** » 28 Feb 2009, 22:00

Sounds like ignition switch issue. Remove other keys and hold key up a little when starting. If still no start then test at cam, crank and MAF for the 5V DC the sensors need. If no voltage then replace ignition switch after checking for loose, corroded or blown fuses.

Speed sensor will not effect starting but will throw a code

eboknight · Post by **eboknight** » 07 Mar 2009, 13:01

I have checked all fuses I tried pushing the key up and starting it nothing different. When I check the sensors for voltage should the car be cranking or the key in the on position.

One thing that I discovered is the main sensor when the key is in the on position it does not click or make any noises or vibration of any sort. I also checked the voltage and it has juice. I am thinking that could be my problem.

Thanks for the input I think I'm getting closer to figuring this bad boy out.

eboknight · Post by **eboknight** » 09 Mar 2009, 20:36

I finaly got a scanning tool I pulled the code p0340. I have replace the cam and crank sensors. I figure it must be the main sensor. I found one for 18.00 new so its worth a shot.
cross your fingers thanks.

eboknight · Post by **eboknight** » 10 Mar 2009, 12:13

I have now replace the main relay and still the some thing. I plan to check the sensors for voltage if none this means a bad ignition switch in the column correct.
What else could I check? Could the piece that the cam sensor reads be bad.
I also still have the fuel relay jumped I figured I would put it back in when it runs again just to make sure its good.
Is it possible something needs to be reset possibly by unhooking the battery.
thanks eboknight

eboknight · Post by **eboknight** » 13 Mar 2009, 10:58

I got a scanner and pulled a code: p0340.
Is there a web site that you can punch the codes into and have it elaborated on.
Thanks

Post by **Ozark Lee** » 13 Mar 2009, 11:06

That is still the cam position sensor code. Will it clear?

You said you replaced the Cam Position sensor and the RPM sensor. Were they known good?

...Lee