I currently have a 1995 Volvo 940 Sedan and it is very difficult to get it to start after setting overnight. It cranks and cranks and does try to catch but just sputters. I end up holding the accelerator all the way down and finally, it will catch and start. Rough idle for a bit and then OK. Once driven for a few miles, it starts for the rest of the day.

After initial start the strong smell of gas is present and it smells as if it is running very rich. MPG is currently very poor at about 14.5 to 16.0 mpg

I have changed plugs, changed rotary, changed distributor, replaced the Mass Air Flow Sensor, replaced the Idle Control Valve.

Checked the Flame Trap system, it appears clear. Replace the Air Cleaner with a new K&N Filter. Have ordered a new set of IPD Plug and Coil Wires (waiting for them to arrive)

Any clues would be helpful.

I'll hazard a guess and no turbo. Normally aspirated, yes? We hope.

All I can do is copy and paste this morning after yet another supposedly Irish Traditional band plays modern (1990s up) country line dancing covers through the third and last session. The coffee was awful and kept me up. Ain't no way.

My best to Alaska state. MO-state is an embarrassment.

Yet with the strong gas smell, with engine off and and key out of ignition, pull the vacuum line from the fuel pressure regulator and the throttle body to see if fuel comes out or the vac line interior is 'damp' with liquid fuel after starting it unsuccessfully once.

Unless you smell gas smell coming off the low-pressure rubber return hoses connected to either side of the FPR. May want to replace the low pressure rubber fuel line. We all should do so.



Image from web page:
https://hotcrowd.wordpress.com/2010/08/01/replaced-fuel-pressure-regulator-on-the-volvo-240-today/

On a cold engine, you can run your nose along the two short and long rubber fuel line sections. If you can smell a fuel smell through the hose, time to replace those sections.


Check out the 700-900 FAQ:

Engine Tune and Performance: Symptoms
https://www.brickboard.com/FAQ/700-900/EnginePerformanceSymptoms.htm


Engine and OBD Diagnostic Codes
https://www.brickboard.com/FAQ/700-900/EngineOBDCodes.htm


Engine: Fuel Injection
https://www.brickboard.com/FAQ/700-900/EngineFuelinjection.htm


Electrical: Engine Sensors
https://www.brickboard.com/FAQ/700-900/EngineSensors.htm


Electrical: Ignition System
https://www.brickboard.com/FAQ/700-900/ElectricalIgnition.htm

Check the OBD codes for Bosch engine control socket 2 for fuel injection and socket 6 for ignition. If a fault code, and not a 1-1-1 flashes out, repeat code check until no new codes display in both sockets. Write any fault codes and post back.

If parked outdoors or high mileage, it may be useful to plug and unplug wire harness connectors you are confident you want to. Connectors like engine control wire harness as the ignition power stage.

Also, any exhaust leaks before the catalytic converter?

Hope that halps.

Questions?

Thrush MacDuffed.
--
Give your brickboard.com a big thumbs up! Way up! - Roger Ebert.