'89 240 DL No Start Condition

Guest · Post by **Guest** » 27 Nov 2005, 19:37

A friend of mine has the above mentioned Volvo. The spark plugs are firing correctly. The car cranks fine but the engine jerks back and forth like cylinders aren't firing. It will sort of try to start but won't stay running. after it stalls there is tons of fuel in the cylinders flooding it and the smell of raw gasoline is everywhere. Whats wrong?

Guest · Post by **Guest** » 28 Nov 2005, 15:31

unfortunately there is more than one thing that can lead to a no start condition. Things to check:

speed sensor for cracked insulation or hall sensor in distributor if you have that.
pull plug (is it wet this indicates that you are gettting fuel in the combutstion chamber, good) ground it, crank and see if you have spark

timing belt to see if it has broken, you can open oil cap and crank and see if cam is turning.

I am assuming that you are getting fuel.

Guest · Post by **Guest** » 28 Nov 2005, 16:00

The sparkplugs are sparking. The camshaft is turning. Where are the speed sensor and hall sensor. The sparkplugs are getting very wet.

Guest · Post by **Guest** » 29 Nov 2005, 15:59

Speed sensor if your car has it is behind the cylinder head on the bellhousing. The insulation cracks and they go bad. Sometimes you can move it around and it will restart. Hall pickup is in the distributor. If you have spark and gas it should do something!!! If plugs are fouled out then you are getting too much gas and I would suspect the fuel pressure regulator has gone bad. Check fuel pressure.

Guest · Post by **Guest** » 03 Dec 2005, 18:46

try unplugging the air mass sensor

depress the metal clip and pull. see if car starts now if it does then connect air mass sensor if it doesn't start now but did disconnected you have a bad air mass sensor.

Guest · Post by **Guest** » 05 Dec 2005, 18:46

please let us know what you find.

Guest · Post by **Guest** » 19 Dec 2005, 14:02

It turned out to be the ignition coil. The spark plugs were firing but they weren't hot enough. I found and old Saab ignition coil, cleaned up the wiring, regapped the sparkplugs. It started right up. Although not all is well. It is missing horribly and running rich. My dad seems tho think the missing is coming from it running rich combined with the fact that the fuel was low and water condensed in the tank. He thinks its running rich because of bad injectors. Is this reasonable, or is there a common suspect.

differen guest · Post by **differen guest** » 24 Dec 2005, 16:44

I'm a Volvo mechanic, I haven't ever personally seen bad injectors on a 240 altough I could be wrong. I would lean more towars bad gas or pressure.
The fuel pressure should be around 280 to 300 kpa by the way.

Stumped Volvo Guy · Post by **Stumped Volvo Guy** » 24 Dec 2005, 21:15

We checked the resistence across the injectors.
The results:

1- 15.2 ohms
2- 17.4 ohms
3- 17.2 ohms
4- 17.4 ohms

Unless its that one injector, I'm stumped. The O2 sensor is osilating correctly. It doesn't run any smoother in limp home mode. It misses/stumples and runs slightly rich. Kind of gutless when driving. Replaced all ignition wires with a new Bosch set. I don't know. If you have any ideas, please help.

Stumped Volvo Guy · Post by **Stumped Volvo Guy** » 24 Dec 2005, 21:17

We also put some fresh premium gas in it.