over40driver Posted April 11, 2011 Report Posted April 11, 2011 My 97 has only 129,000 miles, but has spent the last 9 months beeing not driven. 50% of the time when I start up I have a lifter collapsing and it only runs on 5 cly. When its not sticking it runs like new. Im thinking about trying a quart of Marvel Mystery oil with a second oil change to loosen things up. Any better ideas? Quote
Brian P Posted April 13, 2011 Report Posted April 13, 2011 How noisy is it when first started up, and how long does it take to go away? A lifter that collapses to the point of causing a misfire probably has internal damage. However, if a lifter is noisy enough to get picked up by the knock sensor, it could potentially pull back timing a lot and cause rough idle and such. Quote
over40driver Posted April 13, 2011 Author Report Posted April 13, 2011 (edited) Thats the weird thing, it will either collapse and run bad or not collapse and run perfect. Its about 70% does not. I changed oil today and substituted 1 qt. of Marvel Mys. oil, hoping that will clean out any debris in the lifter. Ive only had a chance to put 500 miles on the car and 1 prev. oil change. For an Ex. cond. car it was about as dirty of oil as Ive ever seen. Edited April 13, 2011 by over40driver Quote
urbex Posted April 13, 2011 Report Posted April 13, 2011 I thought driving it fixes it...but I really have no idea. Or maybe that's just if it's sticky, I don't know. Quote
over40driver Posted April 14, 2011 Author Report Posted April 14, 2011 Fresh oil, additive, and driving. Quote
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