Posted by: Steve H. ®
2001/10/24, 16:24:40
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:Ok, fellow wrenchheads...see if you can help me with this one. I have a 250cid in my Stallion with a bit over 69000 miles on it. It's got new plugs, cap, rotor, wires, and a new carb. The timing has been checked. Compression is just over 110lbs. on the front two cylinders and about 105 on the rest. It starts crisply and has power. There is an annoying miss which is very noticeable at the exhaust as well as with the general engine sound. The plugs still look good and the wires are secure. The compression test was done just before I got on here. All vacuum lines are new and connected securely. The miss is still there even when the engine speed is increased. I'm stumped! I've checked everything over and over and I still can't find the culprit. Before I have to cheat and pay a mechanic (dread!), anybody have any ideas where to go with this???? This is only an experience I had. About the same problem, found out it was a sticking valve, couldn't get it to show up in any tests. Added some Marvel to the gas and oil and within 10 miles it was gone. Was about to pull my hair out when a guy about 70 that had been a mechanic all his life told me to do it. If only I listened to him about 2 days earlier. Hope this helps. I wasn't a believer in Marvel until this either.
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