Re: [AMC-list] 258 Engine Vibration over 2000 RPM

[Jim Blair <carnuck@xxxxxxxxxxx>]

I was thinking torque converter (mine would do that, then suddenly spit out trans fluid when the neck cracked) The 998 in my '82 Spirit is almost to that stage. It already takes a long time to shift into gear when it sits a few days. (that trans will be out

Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10

From: Jesse <j2sax@xxxxxxxxx>
To: amc-list@xxxxxxxxxxxxxxxxx
Subject: [AMC-list] 258 Engine Vibration over 2000 RPM
Message-ID: <128122.2049.qm@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
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So my son's 88 Eagle has a very harsh engine vibration.? We haven't had it too 
long, but I did the MtrCrft Large Cap, plugs, wires and Nutter bypass.? It 
starts and idles excellently but when you goose the gas, it has a shudder that 
goes through the whole car.? When I am driving down the highway, I can put it in 
nuetral and goose it with similar results.? 
 
 
I am hoping it is not the flywheel or dampener.? I have triple checked the 
firing order, adjusted the timing (after the bypass), locked out the carb pins 
and made sure all the wires were plugged tight.? 
 
 
I remembered tonight a V8 swap I did for an old fellow (had a 258 J10 T176, I 
dropped in a 360/727 from a Waggie had had sitting).? For a couple of months he 
would call and say how it was running great and suddenly iy would start coughing 
missing, shaking and the plug gaps would be gone on a plug or two.? I determined 
he had carbon buildup that was dining around the cylinders in occasion and 
flatting out the plugs.? Some Sea Foam, ATF through the carb (lot's of smoke!) 
and a MotorVac seemed to clear it up.? 
 
 
I am going to pull the plugs tomorrow and see what I can find.? 
 
In the interim, any other ideas?? I am dreading the potetnial of a bad Trq 
cnvrtr, but am open to suggestions.? 
 
 
Thanks and have a great weekend, 
 
Jesse

 		 	   		  
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