1993 850 2.0 No start , cranking, dry plugs

JohnnyRingo · Post by **JohnnyRingo** » 01 May 2014, 14:00

Hello
I was poking around under the hood of my Volvo 850 2.0 1993 AT
and noticed this cut wire on the picture from the yellow plug on the left

Anyone know what the purpose of that wire is and where it should be connected?

Thanks for reading.

Post by **Ben850** » 01 May 2014, 15:45

It appears the Cam Timing Sensor was replaced and the "mechanic" didn't know how to dislodge the old connector from the bracket.
Just to be sure, check the other side of that yellow connector to confirm nothing is connected to it. It is likely hooked up to the other yellow connector sitting below in that photo to the presently installed CTS.

Post by **abscate** » 02 May 2014, 03:23

Gah! thats real butchery of wiring....

Ben was being very diplomatic using "mechanic" indeed...

JohnnyRingo · Post by **JohnnyRingo** » 02 May 2014, 19:20

Thanks for the reply.

On something unrelated, or maybe related although i doubt that wire caused it, because it looks like its been cut there for quite a while.

After spending two days trying to troubleshoot the car im coming here for help.

The car wont start, the starter seems fine, its cranking but the engine wont take over.
First started by taking a look at the spark plugs and check if they were ok, sure enough they sparked.
Then replaced the fuel filter to check if either that or the fuel pump was broken, neither was.
Fuel was coming fine to the injection, after poking more around i found out that the injection into the first cyl was leaking gasoline, the o ring seal was broken, i replaced that so the fuel system should have proper pressure now, but the car still wont start. Then we took a look at the spark plugs again, and after numerous times of trying to start the car they were all dry, so it seems the gasoline isn't making it to the spark plugs.

Any ideas?

I am sorry if some technical terms are incorrect, i don't really know much about these things, just my grandpa who is helping me, also translating some words to english is a pain.

JohnnyRingo · Post by **JohnnyRingo** » 03 May 2014, 09:19

The spark plugs work, but they don't seem to be getting fuel.

But i am about to go outside to take a better look at that wire and sensor then.
Ill keep you updated.

Post by **polskamafia mjl** » 03 May 2014, 10:01

Just to make sure, pull the fuel rail off (with injectors attached to rail) and have someone crank the engine and watch to see if the injectors are squirting fuel.

Post by **Ben850** » 03 May 2014, 11:21

polskamafia mjl wrote:Just to make sure, pull the fuel rail off (with injectors attached to rail) and have someone crank the engine and watch to see if the injectors are squirting fuel.

Bring sticks with marshmallows and hotdogs.

Just kidding M. I know what you mean by that test. Unhook the power to the coil for sure.
Have a means to sop up fuel.

Post by **polskamafia mjl** » 03 May 2014, 15:19

lol

When I did this I lifted the fuel rail up and just held the the whole thing so the injectors were pointed towards their respective holes in the intake manifold but I could still physically see whether they were squirting. In my case I already knew I wasn't getting fuel so there was almost no risk of a fire or fuel spraying everywhere, I just wanted to confirm it 100%.

You have a good point though and this should definitely be done very carefully.

JohnnyRingo · Post by **JohnnyRingo** » 06 May 2014, 08:16

Update

Here is a list of the things i have done.

Tried the injectors, they all worked, measured the pressure on the fuel system, was 40psi.
Cleaned the distributor cap, it was barely dirty.
Tested the spark plugs and they work, tested by sticking a grounded screwdriver.
Tested the sensor dmitrij talked about, like the video showed, it was around 300 ohm so it was okay according to the video.
Tested the compression on the cylinders, it was pretty even on all 5.
Tested the air flap that the gasoline pedal controls, it moves.

After trying to start the car numerous times, the spark plugs are dry, should they not be wet?
otherwise im maybe suspecting air, when i was trying to start the car i could see a little smokey cloud in the bottom of the air intake, and when trying to start the car again the air did not move.

So any ideas/suggestions?

And thank's to all of you trying to help, much appreciated.

**Edit**
To not confuse people with the title of the thread the cut wire problem was solved, it wasn't connected to anything.