Hi muskox,

Someone with current experience with a early 1980-era Volvo will chime in. Been a few years for me.

So, you have the LH-jetronic 1.0 or 1.1 injection, or the K-Jetronic mechanical continuous injection? I think you may have the last year of the K-jet on normally aspired (non turbo 240s).

You can test the air intake system yourself, from the back side of the air filter up to the gasket between the air intake port and cylinder head ... don't forget the injector seals. Take a close look at the positive crankcase flame trap piping as 33 year old rubber hoses may be getting quite stiff and not sealing well.

http://www.k-jet.org/

You replaced your wire harness with a factory replacement, your post history indicates, yes?

Unless South Dakota requires as part of emission inspection, remove the preheater intake hose between the air filter box and the heat shield shroud in the exhaust manifold, if still there.

You may have an early idle air control on your K-jet injection system, versus the idle air screw. So, cleaning the idle control motor, verifying fuction, electrical connection, and vacuum line piping are important.

Your K-jet system uses the Volvo Lamda-Sond oxygen sensor feedback system. So, test the 02 sensor. If the CO output from the engine to the catalytic converter input is either too low / lean or too rich. Even without a catalytic converter, a properly functioning 02 sensor will improve both performance and fuel economy.

Your 1982 Volvo 240 will run best with all emissions controls and adjustments working their best.

Questions?

Hope that helps.

cheers,

dud.
--
"Heh-heh heh-heh, he said, 'Hall-Effect sensor!'"