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1991 240 wagon idles rough exhaust emits black smoke, uses too much fuel. Thus far have changed: ECT, ECM, MAF and fuel pressure regulator. No improvement. Engine recently replaced with a lower mileage engine. Need suggestions on how to repair. I love this car and want to drive it on a daily basis. My email : [email protected] Thanks!
 

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Re: 1991 240 fuel usage and rough idle (samuel58)

Samuel..<p>I am no mechanic..but I have had a few old 240s and gotten way over 200k out of both of them.<p>Try this:<br>*Check for intake manifold air leaks<br>*Check the O2 sensor<br>*You may have a grounded/shorted wire<br>*The timing belt could off by just enough to make the car run rough..despite all the things you have replaced.<br>*Check the actual fuel pressure...even though you have replaced the fuel regulator<p>Hope this helps....if not...post this on the 240 forum. I bet Rear Wheel Paul can help you!<br>
 
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