Problems in paradise.....installed the wet kit last week. Since then I've got a miss I can't figure out. When I installed kit I put some colder plugs in (TR6's), header gaskets, window switch and that's it. First time I fired it up I noticed a bad vibration in car ....sounded like a miss. Noticed a wire was on the header. Replaced wires and took it for a drive. Seemed to be fine at first...the longer I drove it the vibration ( miss ) seemed to get worse as the car got hotter. Popping through the exhaust and shuddering. Here's the problem stumper....car runs fine at WOT pulls hard all the up to 6200 just like always....not throwing any codes. But under normal driving or part throttle its a very evident miss. I haven't even tried to spray yet till I get the miss figured out....where to start??

 

Here's the first thing you do...


1. Stop running your car at WOT before your really mess somthing up.

2. Recheck your plugs at night for arching and sparking.

3. Double check to make sure your plug boots are on tightly to the plugs.

4. See if you can get a scan to see wich cylinder is missfiring.

5. come back and report your findings.

 

OK on number 1....just did it to see if it might be fuel related...don't think so.
2 & 3 did several times already....didn't see any arching....and made sure boots 'snapped' onto plugs. I'll look into number 4...I'm leaning torward a bad plug but hate to think about changing them out again.

 

Check your plugs, a resistor inside one of them might just be bad. Put an ohm meter to them and see if any come up unusually high. I've had spark plugs that have been bad right out of the box.

Also, do TR6's still have the screw on boot where it meets the spark plug wire? One of those might have screwed loose.