Having problems with your 1993 Oldsmobile Achieva ?

93 oldsmobile quad 4 2.3 one piston is not working wet spark plug

\015 My 93 quad 4 2.3 engine runs relly rough, piston 4 is not working I hear like something is braking someone told me to change the coil hausing becouse was a missfire I did that but spark plug gets wet like I'm not having any fire.\015\012I also chek for spark and seems like coils are working fine\015\012is any body can help me wit this problem?\015 Posted / edited by AnonymousUser on : 12-08-2019

Answers :

You probably broke a piston ring in the #4 piston have a compression check done
If you have a stethoscope, listen to the injector while the vehicle is running, it could be stuck open. If you hear it pulsing the same as the rest of the injectors, then unplug it, let the engine run so it can get all of the unburned fuel out of cylinder (you said the plug was wet), take the plug and coil from cylinder number three, install them in cylinder # 4, put the coil/plug from 4 into 3, reconnect the injector, and see if the problem moves to cylinder three. Next if the problem does not move to cylinder 3, then you have an issue with either the wiring to the connector at cylinder # 4, or you have a mechanical failure. Remove the valve cover, check the valve springs on # 4. make sure they look the same as all others. If so, turn the crank and further inspect them. If they are mangled, remove the head. It needs to be repaired, and check the piston for damage. You could also do a compression check to rule this out.
Repair Help & Product Troubleshooting for 1993 Oldsmobile Achieva

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