if the cel is lit with no faults you have an ecu chip fault.....the ecu will need replacement to solve your problem

See the FAQ Article Here:
https://www.brickboard.com/FAQ/700-900/EngineOBDCodes.htm

Perform the OBD-1 code check on both socket 2 (Bosch LH2.4 fuel injection) and socket 6 (EZK 116 Ignition). If a code other than 1-1-1, repeat the test in both sockets until no new codes display.

Socket 6 (EZK 116 Ignition) for some codes can set the CHECK ENGINE light.

You have the Bosch LH2.4 fault code of 1-1-3. So a lean or rich fault condition.

If your odometer works, what is your fuel economy (mileage)?

New Hampshire does not require emissions test on 1995 and older automobiles. Yet 240 will deteriorate if engine control does not operate well. A lean or rich fuel to air ration the engine eats (with a proper blue spark at the spark plugs) can cause poor fuel economy, poor performance, fouling of spark plugs and formation of carbon deposits inside the engine, exhaust leaks you may not hear before (like at the header pipe out to the catalytic converter input union) and weak spark. A lean running condition, as caused by air intake leaks after the AMM / MAF, will cause spark plug and engine damage, destroy the catalytic converter, and other concerns. A dried out air intake manifold gasket may show a rough uneven idle when cold, yet sucks in air at any rate that is un-metered through the AMM / MAF if you AMM / AMF meters correctly

You can test the oxygen sensor using a multimeter or a dwell meter. You can also use these to test for a rich or lean running condition.

If you have the silver accordion hose connected between the exhaust manifold preheater plate and the bottom of the air filter box, the AMM / MAF will fail if you do not know the condition of or have replaced the air filter box preheat flap valve thermostat. You can test all of these sensor using your Bentley 240, Volvo Green factory service manuals. The FAQ here provides guidance on how to test with values. Use a better than cheapo Harbor Freight 4-12$ red digital display electric multimeter.

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

The FAQ has more articles you may find useful.

Questions?

Hope that helps.

Exhaust Hanger Strap Material MacDuff (made from big truck mudflap)
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