Question about 1994 Volvo 850

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1994 volvo turbo 850,changed fuel pump,filter,spark plugs,cleaned intake,checked for vacuum leak none. car runs then cuts off after 5 min,if you give it gas it cuts off.please help!

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Thanks for using FixYa and welcome to the site. I have a few questions for you. Is it doing it every five minutes? Also, have you checked the fuel pressure? Is gas getting to the injectors on the engine block? I will be waiting on your reply.

Posted on Mar 30, 2011

  • dale_pr Mar 30, 2011

    fuel pressure at yhe rail is at 32 when key is on, jumps up to 35 when car is turned on then slowly drops to 0 then turns off.some times pressure gauge go's up and down with engine idle then cuts off,some times black smoke out of exhaust then clean,



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1994 -850 Turbo volvo has hesitation in starting then pulsates as if it wants to shut off. While driving it wont go faster than 10mph. I changed the spark plugs, wires and distributor cap. Took off fuel...

Sounds like its in limp mode, where the transmission has a problem and to protect the vehicle it will not go faster. Check online for the parts you need, its mostly a solenoid that fails, unless you blew 3rd gear or something.

Sep 26, 2017 | 1994 Volvo 850

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1994 volvo 850 wont start

Well if the engine is turning over while trying to start but won't, going to have to start with the basics. If the engine light is on when she does run check for codes and see what they are and repost or have someone look at it with a scan tool at a garage. If no codes are present or none that are relavent then Start by checking the spark to the plugs with a spark tester, the adjustable gap kind are best but inline would be ok. if you got spark, check for fuel while cranking of course, (you could smell it out the tail pipe), or remove plugs and see a small spray coming out as the engine is cranking (be careful with this as these are not appropriate tests and you are dealing with fuel, explosive and dangerous to breathe). Don't crank too much as this can wash the cylinders down. if the cylinders get washed down you will need to put some oil in each cylinder just a little, to rebuild compression. If fuel is present in the cylinders while cranking, and you say you have good fuel pressure then will need to ensure compression and timing, and if all these are good, you will have to check for problems with wiring and electronically controlled grounds, etc. You may want to seek some help on these if you are unsure how to continue on with voltage drop tests, and resistance, but maybe you can. I hope this helps and if you have anymore info on the vehicle like test values etc, or need more help, just post back. good luck

Feb 05, 2010 | 1994 Volvo 850

2 Answers

93 volvo 850 glt changed the fuel pump now car wont start. Engine cranks, fuel pump working, fuel getting to the motor but it wont start. The car had trouble starting sometimes so i changed the fuel...

Check your fuel pressure to ensure proper pressure to the block, also did you replace the fuel filter.

On a side note: 3 things a automobile needs to run

AIR-make sure you have a clean air filter and your MAF (mass air flow sensor is plugged in) if you pulled your breather to innspect anything, there is a possibility that it came unplugged or you unpluged it and forgot to hook it back up, a car wont start without it being plugged in if equiped

SPARK-Make sure your car has juice to the plugs, if the plug doesnt fire the car wont run, if you have to pull each plug and ground them to the engine block to see if they arch. If not trace the problem down (if you changed the fuel pump you have some mechanical skill and should be able to troubleshoot a spark issue)

FUEL-Check for proper pressure, dirty fuel filter(s) and if your system has a return line, make sure your hoses didnt get crossed cause this will damage the engine and regulator.

Hope this helps Thanks for using

Jan 22, 2010 | 1994 Volvo 850

1 Answer

1994 960 volvo feels like it is running out of

1. Check the Fuel Pressure Regulator. No sign of fuel should exist when the vacuum hose is pull out.
2. Check the relay (one by the side of dashboard and one in the fuse box engine bay) for the fuel pump and the injection system.

Nov 05, 2009 | 1994 Volvo 960

2 Answers

My volvo 850 wont start unles i put gas in the intake what could be the problem?

Hi Bustos!
Have you checked the car for any fault codes? If not you'll probably find the problem by doing so. If it's any comfort I don't think you'll have too hard a time fixing it - it's not an intermittent problem and therefore usually easy to diagnose.
In the meantime you should make sure your engine is getting spark, air and fuel.
Fuel: The 850 is prone to problems with fuel delivery mainly because of a failing fuel pump relay. The relay is located inside the fuse box under the hood; just unscrew the 4 torx screws to get access to it. If it's green, marked 103, you should replace it with the improved red one.
But first you should check if you can hear the fuel pump engaging when turning on the ignition. If you can't hear it at all you should check wether the pump is getting power or not. If it's not getting power the relay is probably dead.
Here's a forum thread with some more info on checking relay and pump:
Check for spark:
Unscrew one of your spark plugs and hold it to ground (for example the engine block) with something insulated and look for a blue spark while someone turns the engine.Should the engine start up during this test it will sound awful but will not be damaged as long as you don't let it run longer than necessary and don't rev it. If you don't see spark at all at any of the plugs your problem could be one of many, ranging from ignition parts such as coil and rotor to a faulty sensor (camshaft or crankshaft position sensor or others). If the problem is with a sensor a fault code should be present in the OBD system.
Air: The engine draws in air via the throttle body. The throttle body supplies air during normal driving, but there's also an Idle Air Control Valve (IACV) that supplies the engine with air while it's idling. The IACV is cylindrical, ca 10-15 cm long and is held in place onto the front of the throttle body by a round rubber piece. It has a two-pin connector attached to it (on the manifold side). Some rare times a stuck/dead IACV might prevent the engine from starting. If so it can usually be fixed by simply cleaning it. Cleaning and inspecting the throttle body and the IACV is probably a good idea anyway. And while you're at it: Clean and inspect the 3-pin connector connected to a small black box on the throttle body (it's the throttle position sensor). 
Hope this helped give you some ideas as to where to start, don't hesitate to ask if you need any closer instructions.

Good luck mate!

Jun 30, 2009 | 1996 Volvo 850

1 Answer

Sometimes won't start after warmed-up. Now very hard to start.

Hey Rob!
I can almost guarantee you that your problem is the infamous fuel pump relay. Open the hood and remove the fuse box cover (4 torx screws) to gain access to the relays. One of the relays is probably a green one marked 103. If so it needs to be replaced with a red, improved version. If it's not the relay the problem is probably the pump itself. Here's a link to some useful info on the relay and fuel pump:

You should also check for spark when the problem is present. No spark could indicate faulty coil, camshaft position sensor or crankshaft position sensor. Checking a plug for spark is easy: Unscrew the plug and hold it to ground with a pair of insulated pliers or something similar while the problem is present. Have someone crank the engine while you look for spark. Should the engine start while lacking one plug it will sound horrible, but will not be harmed as long as you don't run it too long and don't rev it.

Good luck!

Jun 20, 2009 | 1994 Volvo 850

3 Answers

1994 Volvo 940 turbo wont start!!!!!! =[

I am a volvo tech and your problem is fuel pressure ralated and i had same problem in 1995 850 turbo and the fuel pump was the problem and a used one is around 35.00

Apr 11, 2009 | 1994 Volvo 940

1 Answer

Car is stalling and idleing irradically.

I Would Suggest That You Complete A Engine Cylinder Leak Down Test.....(not A Compression Test But A Leak Down Test) this will tell you if you have internal problems....possible worn rings or a burnt valve(s) I would use a smoke machine to check for vacuum leaks also. Good Luck

Mar 24, 2009 | 1994 Volvo 850

6 Answers

Car stalling

My 1994 850 Volvo did the same thing and it was the Throttle Position Sensor

Jul 18, 2008 | 1994 Volvo 850

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