Thanks for the replies to my query earlier. This concerns a 1985 240 DL USA Federal spec B230F. I've done some more research on this system and it appears that the ignition and injection systems are completely detached; the only connection is an ignition primary signal from the ignition control module to the ECM. Since my car backfires loudly and loses power it appears that it gets so far out of time that it's igniting unburned fuel in the exhaust. Sometimes when it dies it acts like it's running backwards before it kills completely. I checked the ignition control module--it's one with a vacuum diaphragm on it, and the diaphragm is torn. (much better design than I imagined...it appears that the diaphragm operates a variable inductor--this wouldn't wear out like a variable resistor) I put some cyanoacrylate (crazy) glue on the diaphragm, and it seems to run a little better, although with less power!? But I'm sure this won't last, and I'm wondering if anyone has had experience replacing this part. I'm guessing all used ones are in similar shape. I'm also wondering what experiences people have had with the distributors. Do the hall sensors fail intermittently? What kind of luck can you expect if you replace the distributor with the old kind with vacuum advance on the distributor? I really don't want to do that, since it's a major step backwards technologically, but if it's going to cost hundreds to fix this car it belongs in the scrap yard. Another question: Once on my old car I had to replace the o-rings for the overdrive pistons(sluggish, late shift) and the only way you could get these parts from Volvo was to buy new, larger rings with new pistons with larger grooves. (Thanks, Volvo, the originals lasted 200,000 miles, don't really need more expensive replacements that'll last 300k) Thanks again. snipped-for-privacy@juno.com
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20 years ago