Welcome Visitor! Please take a few seconds and bmostowy
New Member
- Joined
- Sep 15, 2014
- Messages
- 7
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1994
- Make / Model
- Ford
- Engine Size
- 2.3
- Transmission
- Manual
- My credo
- Licenced Motorcycle Mechanic
I'm new here so take it easy on me if I'm doing something wrong.
With that out of the way, I'm looking to get some advise: I've got a 94 with the 2.3 four banger which has run like a top until recently. It started idling rough and stalling out at idle a few weeks ago, it still cruises alright, and I haven't noticed a significant dive in gas mileage. I replaced the plugs and wires when I bought the truck about a year ago, and I dump some sea foam in it every now and then to keep it clean. I have no service lights on, but when I run the KOER diagnostic I get a code 172 "Oxygen sensor not switching – system is or was lean – Single, Right or Rear HO2S – Fuel control." KOEO returns 111, all systems normal. I've since replaced the O2 sensor, MAF, and IAC valve to no effect. Going off the "Lean Condition" code, I did what I would do to a bike or quad: start spraying Carb & choke cleaner around looking for an air leak. I found one possible leak: on the back of the EGR valve, there are holes in the housing, and when I spray them, the engine picks up.
Is this normal, or should I replace it? I'm just looking for advice before I throw any more parts at it.
Thanks Guys
With that out of the way, I'm looking to get some advise: I've got a 94 with the 2.3 four banger which has run like a top until recently. It started idling rough and stalling out at idle a few weeks ago, it still cruises alright, and I haven't noticed a significant dive in gas mileage. I replaced the plugs and wires when I bought the truck about a year ago, and I dump some sea foam in it every now and then to keep it clean. I have no service lights on, but when I run the KOER diagnostic I get a code 172 "Oxygen sensor not switching – system is or was lean – Single, Right or Rear HO2S – Fuel control." KOEO returns 111, all systems normal. I've since replaced the O2 sensor, MAF, and IAC valve to no effect. Going off the "Lean Condition" code, I did what I would do to a bike or quad: start spraying Carb & choke cleaner around looking for an air leak. I found one possible leak: on the back of the EGR valve, there are holes in the housing, and when I spray them, the engine picks up.
Is this normal, or should I replace it? I'm just looking for advice before I throw any more parts at it.
Thanks Guys
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