[HELP] Misfire on Cylinder 3

[MoshimoGTP]

Hi,

yesterday i was noticed than the SES Light blink, the car feels like fuel or spark failure sometimes. It was scanned and OTC Says Cylinder 3 Misfire, the code was cleaned and SES Light come on again with the same Cylinder 3 Misfire problem. I've changed new fuel injector, new spark plugs, new fuel filter, new PCV Valve, new wires, new coils, what are wrong?. The body shop guy says my car needs a head work because he think than one or more valves have carbon deposit on it.

The piston compression was tested on each of front cylinders and the results are:

Cylinder 1 - 160
Cylinder 3 - 125 <-- Cylinder 3 Misfire (Scanned by OTC OBDII Tool)
Cylinder 5 - 175

When the car starts from traffic light, the car feels good, but when stops on another traffic light the car feels like misfiring. When the car was at 50MPH aprox, and the tranny shift to passing gear (when you push the gas quickly) the car feels misfiring alot!!!!!!, and the SES Light blink and blink and blink... the code is CYLINDER 3 Misfire!

Someone with the same problem? I don't have checked the fuel pump pressure, but i think that is not the problem. The fuel pump resistor?

What i can do? head work? carbon deposit cleaner?.

Please I need HELP!, i dont want to waste my money on bad things.



Thanks a lot!

[gtgp97]

i had this problem when i installed new plugs and cracked the porcelain on one of the plugs installing it. changed the plug and ran fine

[MoshimoGTP]

Yes but, i have changed it 3 times about. Since about 3 or 4 months the cilinder 3 misfires are constant. The problem are more bigger day by day.

What can be? please help


Thanks a lot

[MoshimoGTP]

Well, my car is losing power, and performance. My actual MPG comes from 15mpg to 11.9mpg right now.

Monday, my car go to mechanic shop to make head works.

Thanks

[AKWE-gt]

when they check engine compression the fuel pump should be shut off, so your fuel system shouldn't have nothing to do with the low compression number. could be looking at some burned or sticking valves.