wherestheswitch
Member
- Joined
- January 22, 2020
- Messages
- 12
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- Year, Model & Trim Level
- 00 mountaineer base
So I've read some other similar post and wanted to post mine as well to search further for solutions seeing as how I've yet to easily fix my own. The issues I have is that when I crank it (it cranks first time every time fine) the engine sounds fine at first. After putting it in gear the RPM lower as you would expect (although probably too much seeing as how it just idles at 600-650 RPM to boot) Then when I hit the accelerator there is a noticeable lack of power and if you go say over 2500 RPM the engine will start backfiring ( I assume through the intake because of the lean code and it sounds like it is coming from the front of the Vehicle) I'll list what I've replaced:
Transmission (unrelated I hope, the old one slipped)
Fuel pump (replaced strainer and internal hoses for the assembly as well)
Fuel filter
spark plugs (platinums)
spark plug wires (golds $50)
Air filter
EGR valve
A single injector (for now and replaced O-rings for all injectors on bank 2)
Upper and Lower intake manifold gaskets
A single O2 sensor so far
Filled the gas tank then emptied a can of seafoam injector cleaner into the tank.
Hot soaked the engine with a can of seafoam after getting it to temp. for 10 minutes then ran it afterwards
I've cleaned the MAF sensor with MAF sensor cleaner
Cleaned Idle Air control with the same cleaner
cleaned butterfly valve with carb and choke cleaner
Fuel pressure at rail: 60 PSI (only at idle and revved in park because the hose isnt long enough for me to see while driving)
throws misfire codes for bank 2 when I take it on the road and accelerate in gear.
It seems to idle at about 600-650 RPM
I did see a fuel trim freeze-frame readout. You will notice long term on bank 2 is 19%.
I made a vacuum smoke tester... out of a soldering Iron in a glass gar (epoxied the iron facing down through the lid where the tip would burn socks soaked in mineral oil inside... then just attached air into one side of the top of the lid and ran a hose out of the other side of the top of the lid.) The way I tested was to remove the breather hose from the breather box, then covered the opening of the hose with a rubber latex glove. I then removed the brake booster hose from the brake booster and inserted the hose from my smoke tester and ran smoke through that way.
At first there were a few areas that leaked smoke and I addressed them. the hose from the breather hose that goes to bank 1 head was replaced because of a leak. I cant recall anywhere else that I could see leaking the smoke. I'm still under the impression that I could still have a leak due to the engine only really acting up when i'm accelerating in gear. I put maybe 20-30 psi of smoke through it and it held that fine but i'm not sure if there's a lot more pressure or vacuum when the engine is under a load. Any info on that would be greatly appreciated.
I have removed the exhaust and inspected all 4 catalytic converters. The first bank 2 converter is or at least has been clogged because the honeycomb was melted looking and a good bit of it broke up and fell to the first big converter. In this pic just ignore the mirror piece I was previously trying to use it to look inside until I got an endoscope. I actually drove the truck without the exhaust after the manifold... It still backfired and skipped under acceleration so im not sure how much better it will run after spending $250 on this dual converter y-pipe.
Basically I'm not an expert or even a seasoned shade tree mechanic for that matter... I just bought this truck from my mom to help her out and figured I'd fix it up in the meantime but it's really giving me a headache at this point. If there is any more info I can provide just let me know ill keep an eye on this thread and just any insight to the next thing I should try is greatly appreciated. Im not sure like I said earlier if I'm having so much trouble diagnosing this issue because it only acts up under a load and just cant replicate the problem while being under the hood or perhaps I just needs some fresh eyes on the problem. Thanks.
Transmission (unrelated I hope, the old one slipped)
Fuel pump (replaced strainer and internal hoses for the assembly as well)
Fuel filter
spark plugs (platinums)
spark plug wires (golds $50)
Air filter
EGR valve
A single injector (for now and replaced O-rings for all injectors on bank 2)
Upper and Lower intake manifold gaskets
A single O2 sensor so far
Filled the gas tank then emptied a can of seafoam injector cleaner into the tank.
Hot soaked the engine with a can of seafoam after getting it to temp. for 10 minutes then ran it afterwards
I've cleaned the MAF sensor with MAF sensor cleaner
Cleaned Idle Air control with the same cleaner
cleaned butterfly valve with carb and choke cleaner
Fuel pressure at rail: 60 PSI (only at idle and revved in park because the hose isnt long enough for me to see while driving)
throws misfire codes for bank 2 when I take it on the road and accelerate in gear.
It seems to idle at about 600-650 RPM
I did see a fuel trim freeze-frame readout. You will notice long term on bank 2 is 19%.
I made a vacuum smoke tester... out of a soldering Iron in a glass gar (epoxied the iron facing down through the lid where the tip would burn socks soaked in mineral oil inside... then just attached air into one side of the top of the lid and ran a hose out of the other side of the top of the lid.) The way I tested was to remove the breather hose from the breather box, then covered the opening of the hose with a rubber latex glove. I then removed the brake booster hose from the brake booster and inserted the hose from my smoke tester and ran smoke through that way.
At first there were a few areas that leaked smoke and I addressed them. the hose from the breather hose that goes to bank 1 head was replaced because of a leak. I cant recall anywhere else that I could see leaking the smoke. I'm still under the impression that I could still have a leak due to the engine only really acting up when i'm accelerating in gear. I put maybe 20-30 psi of smoke through it and it held that fine but i'm not sure if there's a lot more pressure or vacuum when the engine is under a load. Any info on that would be greatly appreciated.
I have removed the exhaust and inspected all 4 catalytic converters. The first bank 2 converter is or at least has been clogged because the honeycomb was melted looking and a good bit of it broke up and fell to the first big converter. In this pic just ignore the mirror piece I was previously trying to use it to look inside until I got an endoscope. I actually drove the truck without the exhaust after the manifold... It still backfired and skipped under acceleration so im not sure how much better it will run after spending $250 on this dual converter y-pipe.
Basically I'm not an expert or even a seasoned shade tree mechanic for that matter... I just bought this truck from my mom to help her out and figured I'd fix it up in the meantime but it's really giving me a headache at this point. If there is any more info I can provide just let me know ill keep an eye on this thread and just any insight to the next thing I should try is greatly appreciated. Im not sure like I said earlier if I'm having so much trouble diagnosing this issue because it only acts up under a load and just cant replicate the problem while being under the hood or perhaps I just needs some fresh eyes on the problem. Thanks.