Please help!!!!! If anyone can.

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Nov 17, 2017 | 01:34 PM

#11

Oldblue

Administrator

Joined: 10-13-2011

Posts: 40,083

From: Welland,Ont Canada

Could be a failing catalytic converter, also

https://www.obd-codes.com/p0304

Nov 17, 2017 | 05:02 PM

#12

harly14

Thread Starter

Joined: 11-04-2017

Posts: 4

From: Clayton,OH

Getting rid of it 150 in all 3 and 120 in #4

Nov 17, 2017 | 05:17 PM

#13

donbrew

Moderator

Joined: 01-23-2009

Posts: 26,533

From: Fredericksburg,VA

Head gasket. a shop could fix for 6 hours labor + $50 for the gasket.

Nov 17, 2017 | 07:10 PM

#14

Oldblue

Administrator

Joined: 10-13-2011

Posts: 40,083

From: Welland,Ont Canada

It could be a stuck or carboned ring, run Seafoam thru it, can’t hurt.

Nov 17, 2017 | 07:22 PM

#15

RJ_RS_SS_350

Moderator

Joined: 05-01-2014

Posts: 8,512

From: California

It could be a few things. The previously mentioned leak down test would determine whether it is rings/piston, gasket, or valves.

Nov 18, 2017 | 12:25 PM

#16

db2006

Member

Joined: 04-03-2010

Posts: 59

From: Wisconsin

Quote:

Originally Posted by harly14

Getting rid of it 150 in all 3 and 120 in #4

Did you try putting oil in number 4? If it hasn't been firing the rings might be washed down by the unburned fuel.

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