Need Problem Diagnosed
Thread Starter
Staging Lane
Joined: Apr 2007
Posts: 75
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Need Problem Diagnosed I just put new TR55 plugs and already had msd wires. arter about 300 miles, now my car interior lights dim off and on, the speedometer acts like it had tarrets shaking or vibrating back and forth, when i just start out and turn my wheel and accelarate the car vibrates/ shakes a little. When i am at speed it feels like the car is missing or shorting out then reconnecting. I have ordered an aeroforce interceptor scanning guage and have checks the plug wires i can reach but i really don't feel like tearing it all appart if there is an easier way. Any suggestings or ideas?
Check ALL the plug wires if all feels good I would pull ALL of them and check to see if any are cracked or if one of the gap's is smashed to the electrode. You can put a little dap of dieletric grease on the spark plug top.
+1 always check the plugs and wires during a miss . a cracked plug will climb rpms but it will start to miss when getting on it in the rpms . sometimes will not throw a code if it is not too bad . sometimes the wires on the backs of the coil packs can get exposed or pinched and cause an electrical malfunction .
Also check your plugs for the screw on terminals. I've seen some TR55 NGK plugs with those, and that's about the worst design I've ever come across. Those terminals loosen over time and cause all kinds of headaches.
probably a either cracked plug or wire that somehow burnt. ignition misfiring by arcing near any electrical component will give some weird emi issues really. it might not throw a light but still may have a pending code you can retrieve from any ordinary scan tool that might assist on cylinder number
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