I wrote last week about an intermittently buzzing fuel pump and a funky idle. After driving a bit yesterday, thereby giving the engine a chance to warm up fully, the idle speed would oscillate between 1400 and 1000 every 1/2 second or so. When cold, it would often stay around 1400 and just dip to 1000 on occasion. In any case, I noted that this problem seemed to occur after I had done some work under the hood. Among other things, I changed the cap and rotor. Well, it turns out that I must have knocked off a very thin (1/4"?)air hose in the process of doing this work. This hose is located a few inches below and behind the distributor (when standing at the back and facing the engine. It's hard to see unless you're looking for it, and I hope that this info may help others having idling problems similar to that described above. Meanwhile, the buzzing fuel pump is too intermittent to diagnose with certainty. It seems to happen more when idling, but it's not consistent. Perhaps i just can't hear it as well when driving. Thanks again to all who offered help. If only all problems were as easy to fix as vacuum leaks...... David |
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