Hi all,

I have been reading this forum and I found it so helpful. Now it's my turn to ask a question. I have 1996 850 Turbo Wagon and it has a strange problem going on. Last week I drove it w/o any problem and parked it. When I came back, it did not start. It cranked but no ignition. I checked battery poles and cleaned. Did not work. I tried jump start. Did not work. Same thing, cranking but no ignition. Then I left the car over there a day. I tried again next day. It was almost starting but stalled again. Then when I tried and tried, it went worse. No ignition. Even new battery did not work.

Then I tried to read codes. I bought a new code reader. Guess what. Reader did not work. I returned it. I am wondering if ODB II is available for my car or not.

My car has a battery problem historically. Two months ago, car did not start even no cranking. Then I cleaned the battery poles, it worked. Same thing happened last month. Then I played with fuses. It worked again. But not this time.

Last thing, last winter when it was cold, it was misfiring when I stopped at the red light or stop signs after driving 20-30 minutes. When I put the transmission to neutral, it was ok. I am telling you this since I have got this ignition problem when we got the first cold weather of the year! This car has an allergy to cold weather.

My plan is to check:
- injectors if they are getting enough fuel
- alternator if it runs well
- Ignition coil
- then spark plugs and cables

Any help?

Thanks a lot.

Kubi

 

^Check the fuel rail and see if there is pressure (there is a valve on the end and you press it and see if gas squirts outs).

Cranking and no start is what I experienced when my fuel pump died.

 

first of all, if your car is cranking, the problem is not the battery. it takes more cranking amps to turn the motor than it does to power the entire electrical system once the engine is running.

so you need to verify you are getting spark. you can take out one spark plug and have it touch the engine block to createa ground. have someone crank the engine for you and see if there is spark. if not, could be the ignition coil but verify the cap and rotor are ok first.

if there is spark, then your next best bet is the fuel system. becuase of the volatility of gas vapors, i usually leave this task to a mechanic...

 

Hi all,

Finally I had my car towed to my place.

I got a simple Acton from Advance Auto. The scanner says NO CODE.

I checked:
- injectors if they are getting enough fuel. The valve at the fuel rail does not have fuel. No squirk.
- Fuses are ok
- No HUM sound from the fuel pump when you try to start engine
- I looked at the fuel pump relay 103, it looks ok. How can I check it?

Questions:
- Where is temp sensor located exactly? left, right, under what?
- If I need, can I replace fuel pump? Is there any safety issue?

Thanks a lot.

Kubi
1996 850 Turbo Wagon 140K miles

Any help?

Thanks a lot.

 

I would check for power to the fuel pump.
Sounds like the fuel pump night be bad.

 

Try this, while cranking the engine, hit the bottom of the fuel tank and if the pump is bad, it will start up.

B

 

maybe a coil ??Are you getting spark ? but yes I would check fuel pressure

 

it sounds like your fuel pump is not working....

 

Yep, I too think fuel pump. Have you check the fuel pump fuse? Not just look at it but tried swapping it out with another known good fuse? I say this because I have come across a couple fuses in my time that have looked good, but are still bad.

Just my .02

Good luck!

 

usually if the fuel pump fuse is blown, the fuel pump has seized...

 

Some guys say: "You can narrow down the problem quite easily. Remove the housing around the fuse box under the hood and then remove relay number 103. There are 4 terminal numbers molded into the plastic on that relay, 31, 31b, 87, and 15. Make a jumper wire that fits between the sockets corresponding with the 15 and 87 lugs on the relay and see how the car runs. Whenever you arrive at your destination be sure to remove the jumper wire. If it runs OK either repair or replace the fuel pump relay. If you still have issues with the jumper in place then chances are it is the fuel pump itself. "

What type of jumper wire should I se for that?

Kubi

 

Why not just open up the relay and inspect it or replace it.
That would be a ton easier than going through all the trouble of installing the jumper wire.

 

My spark plugs are making good sparks, I saw that. I bought a new fuel pump relay. It did not work. Hitting the fuel tank with something also did not work. I realized that replacing fuel pump is a big task for me. I think I am little bit disabled for this type of job. I could not understand the logic and decied to go with a professional. I moved out everything to see the pump and sending unit but pulling out those things is too much for me. Now my car is like a mass inside.

I called my professional bodies, they told me that they need to put new pump and sending unit. Is that always the case? What does sending unit do? I also called small shops, one guy gave me very low quote just for pump replacement. Would that be reliable?

I need your expertise on this. All help is appreciated.

Thanks

By the way, Happy New year!

 

It is usually easier to just replace the assembly.
The 850's don't have the tank sending unit with it.(Gas guage)Some think it does.
As long as it is a good quality part the pump only should be good.

 

Happy New Year Kubik.

I'd like to know exactly how much the shop wants to charge for the pump replacement. The pump itself, at FCP Groton, is at $125-195, depending on what brand you like (Bosch/Hella-Pierburg, both are name brands and should be made in Germany). I would not use anything else other than the above 2 mfgs. Genuine Volvo unit comes with the outer shell, which is reusable so you do not need to spend $315 on the complete unit.

The sending unit is nothing more than a signal sending unit for the fuel level gauge. It should not have anything to do with no-start problem. Unless your fuel level gauge is inoperative, you do not need the sending unit.

If you do not feel comfortable doing the job yourself, have a pro do it for you. Working on the fuel system contains possible dangers and can be fatal if one does not know what to watch out for.

As to OBD-II scanner, Actron CP9175 is a good one, though it comes at a price (approx. $170) and that's the one some AutoZones use.


JPN

1st pic: Bosch pump
2nd: Hella-Pierburg pump
3rd: Sending unit

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