What’s up everyone….. was looking for some guidance on my situation..

my car had a CEL light for an IAT sensor. I brought it in for repair. They replaced the wiring on the sensor and the CEL went away. They also replaced the gasket on the vtec solenoid as there was a leak. A couple days later, the car stopped hitting vtec. Picked up speed fine until about 6k rpm when it would stop accelerating and made a weird skipping sound. This moved down the power and until the car eventually shut off at a red light and wouldn’t start. Had the car towed to the mechanic. I noticed that the plug for the vtec solenoid was hanging off before it was towed and some oil had leaked out.

mechanic saying one of the spark plugs came out and another was loose. The one that came out damaged the threads. Threads repaired and the car starts but does not stay on. There is no compression in one of the cylinders. Mechanic suggesting replacing the engine. Has anyone ever had this happen to them? What did you end up doing?

the car has a supercharger on it and is generating 410 hp. Does it make sense to replace the engine or to rebuild it? Any suggestions will be greatly appreciated

 

Yes happened to my spark plug ,piston 3 tried to weld itself to the bore = terminal damage= i replaced engine .

 

Original plug torque spec was too low. Plug can come loose, cause misfires, which can damage plug and break a piece off, which then bangs around inside cylinder and destroys it.

But mechanic didn't say plug was damaged, but rather threads.

I find that odd. That tells me someone cross threaded plug reinstalling it. Did you do different plugs or gap them when sc installed? Who did that part of the job?

Before throwing in the towel I'd get a boroscope and look at the cylinder walls. See what the real issue is.

Also do a leakdown test. That'll tell you where compression is leaking. From valves (head refresh or replace would fix it), or from piston rings, from head gasket, etc.

 

Threads are torched if the plug comes loose. Improper tightening is the cause.

 

Who touched the plugs last?

 

Thanks for the feedback everyone. Not exactly sure the last guy to touch the plugs so don’t wanna put anyone on blast without being sure.

But from other experiences, I can say for sure that everyone should stay away from MP Built in NJ.

Will see if I can get a borescope in the cylinder to assess damage and a leak down test to find where it’s leaking from.

Really did not need this shit happening right now…. Lol

 

damn dude, sorry for your misfortune, and good luck to you!
if you dont mind me asking, how many miles are on your car and how many of those did you have the supercharger kit on?

 

Thanks man. Shit happens…

car has a little over 112k on it. Bought it with the supercharger on it at 82k miles. Updated the blower and retuned it when I got it at 82k.

the previous owner was an older guy who didn’t take full advantage of the supercharger. He had maintained the car very well otherwise.

 

hmmm... makes me wonder what went wrong. and 2nd guess supercharging mine in the near future

but i guess it had to be something with the plugs. they were either not repositioned for the power you were making, which could lead to your problem (maybe) or they were just improperly torqued when last installed.

 

All his symptoms align with plug coming loose. Other, stock cars have had these same results.

Its a known fact that plugs on these cars can and do.come loose even if torqued to original plug torque spec (specs were updated by Honda, and Billman recommends using an even higher torque value.) If someone referenced an outdated plug torque spec when working on this sc'd car, that would explain all.

So this does not appear to have anything to do with being sc, other than plugs being touched more often to account for adding sc (sc typically uses different plugs or at very least smaller gap).