2003 5.0 MPI engine flooding/backfiring??

Black_Diamond

What did the mechanic mean by 'destroyed spark plugs?'  With the MPI I would think it would still start/run, badly, but run. Guess I would have tore the engines down to understand the issue. Replacing is $$$!

davidbrooks

Thanks @jcc2823 I just had the same thing going on last weekend on my 2003 5.0 MPI.....I was really thinking it was in need of a tune-up with Cap, rotor, wires, plugs etc....  It finally did start and would restart after it was warmed up.  But now every time it happens i am going to think i need new engines.

jcc2823

He said the spark plugs were basically burned up/descintigraded. 

frenchship

Has to be detonation or pre-ignition to destroy spark plugs .two culprit ignition or fuel.

aero3113

frenchship said:

Has to be detonation or pre-ignition to destroy spark plugs .two culprit ignition or fuel.

Or could be the wrong plugs, if the plugs are too long the top of the pistons will destroy them.

frenchship

If plugs where to long all cylinders would be affected

aero3113

frenchship said:

If plugs where to long all cylinders would be affected

I was just adding to your list of things that can damage a spark plug. 

frenchship

No problem just that in the beginning of the tread it was mentioned that two cylinders where affected

jcc2823

Yeah I asked them to make sure it had the right spark plugs in cause it had just been serviced 2 months prior, but they checked and they said they were the right plugs (this is a different company that checked the engine out than who had serviced it).