Hey Scotty, my E250 has approximately 330,000 miles. I've changed the spark plugs, wires, and ignition coil together approximately 50,000 miles ago. It's been about 5/6 years. Van recently threw a code for insufficient A EGR flow. Van idled rough, would stall out, replaced it with an OEM part, then the van started running just fine again. I haven't had any drive issues at all since I replaced the EGR valve. However, I did notice that after I reset the codes and drove a little ways, I decided to check the codes again. Still got the code for insufficient EGR A flow and now a P0300 code. I also have a P0316 code.
Curious to know if I need to worry. I believe it has an exhaust or intake manifold leak which these are known for having that issue. Any ideas what this could possibly be? Thanks for the help, you guys are always helpful.
Well you can have insufficient flow if you do have a leak. Leaks are easy to find. Just have somebody put a smoke machine and a tail palp of your car and wherever there's leak smoke will come out and you can fix that. But you also have misfires so you might also have a vacuum leak somewhere that would also cause low flow
@scottykilmer Thank you kindly Scotty. Been watching your videos since I was about 19 years old. You've saved me thousands. Thank you.
I had a 98 F-150 with the 4.2 and they had an issue with a vacuum line run behind the battery. It would cause corrosion and a vacuum leak.
I know I got a code, but it wasn't the po300, but I would check that to be sure. Just look behind the battery to see if those lines run in the same place. My leak was between the battery, and the passenger side of the firewall. The vacuum line is very small, like maybe 3/8".
@nlord Code went away after I reset the codes, no driveability issues. Ill check that, thanks. I realized I didn't put the gasket back on the egr valve when Installed the new one so I'm an idiot for that.
@mikem hey, that's good news though! No damage done, and you figured out the issue.