At My Wits End!
- BOBBA LOUIE
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Here's an update: I thought I'd do it this way instead of starting a new topic.
I have zero psi back pressure on both banks. I blocked every vacuum port on the intake manifold. Still getting a ST Fuel Trim driving Max Lean on Bank 1, because it's too rich. Bank 2 looks better at about 2 to 5%. Have not run it long enough since KAM reset to get any LT Trim results yet. Both O2 Sensors have been replaced. MAF replaced. Cam timing tool set is in hand and that is the next step.
This has certainly been a challenge and I have turned into a Parts Changer! LOL
Thanks, everyone for the great input!
I have Bank #1 - Rich and Bank #2 - Lean Codes! ???? P0300, P0301, P0302, P03
03, P0316 Codes were corrected by replacing the plug wires and cleaning/gapping the plugs. I have new plugs on hand and will replace them, since I'm Shifting into "Parts Changer" Mode.
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.
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- cheryl hartkorn
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BOBBA LOUIE wrote:
I used to think I was fairly savvy at diagnosis, but those days are gone! LOL
LOL! We've all had those days! Don't lose the faith. You'll bounce back.
Short Term Trims are maxing out on Bank 1 toward lean and Bank 2 toward rich
What are your Long Term Fuel Trims?
Does fuel pressure bleed of after turning the key off. Can you do an injector balance test?
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
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Is there a, noticeable, Misfire while the light is flashing?SES Light flashes after idling for a relatively short time (about 5 minutes)
I agree with cheryl about resetting KAM.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
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"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
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- bruce.oliver
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- BOBBA LOUIE
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- BOBBA LOUIE
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- bruce.oliver
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