Bobbylew
Member
- Joined
- April 16, 2014
- Messages
- 40
- Reaction score
- 9
- City, State
- Pisek, ND
- Year, Model & Trim Level
- 1994 Explorer XLT
I have Bank #1 - Rich and Bank #2 - Lean Codes! ???? P0300, P0301, P0302, P0303, P0316 Codes were corrected by replacing the plug wires and cleaning/gapping the plugs. I have new plugs on hand and will replace them.
I used to think I was fairly savvy at diagnosis, but those days are gone! LOL
I have changed the Intake Plenum Seals, Plug Wires, Cleaned and checked Plug gaps, MAF Sensor, will replace Upstream Oxygen Sensors and PCV Valve and Spark Plugs. SES Light flashes after idling for a relatively short time (about 5 minutes), indicating misfire(s). My SOLUS shows the O2 Sensors are switching, but Short Term Trims are maxing out on Bank 1 toward lean and Bank 2 toward rich. We were discussing (and cussing) it at my buddy's shop and fuel injector "Crud" came up, given the vehicle sitting for so long. This might be an "Ah Ha!".
I finally got it licensed and registered, so got on some hard pavement. Floored it and it seemed pretty darned good for a 4.0 with 125,000 miles. That made me believe the Catalysts are okay. I'll check back pressure when I get it on the hoist.
I'm getting ready to "slug it" with LUCAS Fuel Injector Cleaner and then, discovered that it has no Fuel Pressure Test Port (Grrrr!). Fuel Pressure on my SOLUS shows 39.8 psi. and no injector electrical faults. I guess I'll pull the intake plenum again and remove and clean each injector and replace the O-rings. I have an injector pulser and might give that a try before removing them.
This one sat out in the open, on a concrete slab in Northeastern North Dakota for about 2 years, 6 months and started right up with a new battery and PCM. I immediately filled it with fresh fuel. I have looked for wire "Chew Throughs", since I found a nice "Squirrel Habitat" in the upstream side of the air filter.
After the O2 sensor, Transfer Case and Transmission Service, I'm "detail stripping the interior" and will look for more signs of "damage by residents".
Other than all that, it's a fairly clean vehicle, with little rust. I thought the price was right at $500.00. It is still in the "Good Deal" category, given the market prices I've seen around here.
If anyone has ever had this experience, or has any ideas, I would be very appreciative of what you have.
I used to think I was fairly savvy at diagnosis, but those days are gone! LOL
I have changed the Intake Plenum Seals, Plug Wires, Cleaned and checked Plug gaps, MAF Sensor, will replace Upstream Oxygen Sensors and PCV Valve and Spark Plugs. SES Light flashes after idling for a relatively short time (about 5 minutes), indicating misfire(s). My SOLUS shows the O2 Sensors are switching, but Short Term Trims are maxing out on Bank 1 toward lean and Bank 2 toward rich. We were discussing (and cussing) it at my buddy's shop and fuel injector "Crud" came up, given the vehicle sitting for so long. This might be an "Ah Ha!".
I finally got it licensed and registered, so got on some hard pavement. Floored it and it seemed pretty darned good for a 4.0 with 125,000 miles. That made me believe the Catalysts are okay. I'll check back pressure when I get it on the hoist.
I'm getting ready to "slug it" with LUCAS Fuel Injector Cleaner and then, discovered that it has no Fuel Pressure Test Port (Grrrr!). Fuel Pressure on my SOLUS shows 39.8 psi. and no injector electrical faults. I guess I'll pull the intake plenum again and remove and clean each injector and replace the O-rings. I have an injector pulser and might give that a try before removing them.
This one sat out in the open, on a concrete slab in Northeastern North Dakota for about 2 years, 6 months and started right up with a new battery and PCM. I immediately filled it with fresh fuel. I have looked for wire "Chew Throughs", since I found a nice "Squirrel Habitat" in the upstream side of the air filter.
After the O2 sensor, Transfer Case and Transmission Service, I'm "detail stripping the interior" and will look for more signs of "damage by residents".
Other than all that, it's a fairly clean vehicle, with little rust. I thought the price was right at $500.00. It is still in the "Good Deal" category, given the market prices I've seen around here.
If anyone has ever had this experience, or has any ideas, I would be very appreciative of what you have.