Hi, a few weeks ago I was getting a rough idle, revving on idle and rough acceleration. It came after a bit too long between an oil change. I added oil, but my dipstick showed almost none. My check engine light was giving me p0401, so I swapped my EGR valve, then DPFE and then tested my vacuum solenoid. Everything checked out, and the check engine light turned off, but the rough idle and rough acceleration are still there around 40 mph to 50 mph.
Now, there was an air leak, so I swapped the hose attaching to the throttle body which cured the idle revving with a good looking one from a junk yard, same model. I also cleaned the throttle body, sprayed carburetor cleaner in the EGR tube and shoved wire brushes in the small ports to clean it out. I swapped seven of the eight spark plugs (#4 has a piece of tape stuck to it, and the socket won't seat), and then tested the front four plugs while running to see if wires and coils were still good. They checked out. I put two rounds of fuel injector cleaner into my tank, on separate occasions but it didn't change the outcome. It runs fine while cold, but once it's warm it gives me the roughness.
Okay, I've got two problems. 1. I've got a spark plug I can't get out because of the tinniest piece of tape in the way from the socket wrench seating properly. This plug is also the one hardest to reach, and I'm at a loss of how to get it out. I found out using a mirror and a specially rigged head lamp. 2. My rough acceleration has turned into check engine light flashing on and off while driving. Today, my engine shut off entirely after driving it to AutoZone and plugging in the obd2 scanner. I am assuming it's check engine light flashing from unburned fuel getting into catalytic converter but I can't solve the misfire problem. Suggestions on what to try next?
Monday, January 11th, 2021 AT 10:14 AM
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