danno2944
Active Member
- Joined
- February 22, 2018
- Messages
- 97
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- Year, Model & Trim Level
- 99 exp sprt 4x4 4.0sohc
I hate to post about a P0174 again, but here we go.
To start am aware of the lean condition procedure thread and intend to troubleshoot, just wanted to see if anyone might have some insight.
2nd owner, all maintenance records, 175000 miles, regular oil changes never missed one every 3500 miles, burns no oil.
I have neglected this issue for a while and it has gotten progressively worse I will try to describe symptoms.
It was a DD for years but for the last few years it only drives approx. 2 times a week or so.
I have had this code and check engine light for a few years and ignored it, mostly because it never had any issues at all.
The P0174 lean bank 2 engine code tripped at 55mph and 2255 rpm on the freeze frame and NEVER included a P0171 ever.
As time has passed the fuel economy has gotten progressively worse, I began experiencing hard start ups in our cold winter. So cold/hard start unusually high spike to about 2000rpms than it would drop to 750rpms like it was going to stall, than would grab on to idle at normal 1100ish cold idle and drop back down once warm to 750-800 rpm.
As time has passed that got worse, to the point that after hard/cold start to just over 2000rpms(same symptoms as described above) except now on the drop off it would go to 500rpm and bog until I gave it throttle to get it back to normal cold idle. KEEP in mind this is also intermittent between these first few symptoms described, sometimes it would start fine?
Now it finally got to the point that it would cold/hard start 2000+ rpms (same symptoms) than drop to 500 rpm and without gas stall out, but restart fine after a few seconds of throttle it would warm up and regulate itself.
As these symptoms all got worse the idle got worse with them as well, fluctuating a up and down a few hundred rpms, just kind of searching/surging
Lol, Now it stalled and wont start. The Old Explorer gave me all the signs she could, and the honest truth is I have been searching the forums frequently and assembling a parts list to do a major tune up. As I went to start truck to move to shop 50 meters away, to start work on her, she wont start, sounds like she wants too, but wont.
After a visual inspection I have noticed that there is some swelling and oil weeping on the vacuum line from the IM that comes from the Brake booster. The build up is right at the IM connection side.
The CPS cam positioning sensor on drivers side valve cover has oil build up on and around, and that same valve cover has began weeping since switching to synthetic finally last oil change,
I also have an exhaust leak at my muffler.
My original diagnosis was IM leak, So I ordered gaskets, all of them including, IM, valve covers, egr tube gasket, fuel injector grommets to service them. And the regular maintenance that needed to be done, PCV, fuel filter, trans filter, spark plugs and all fluids, etc. Also was going to do typical IAC and MAF cleaning.
If there is any thing I forgot let me know.
Any help is appreciated guys, I am going to go try to start once more, that will push to shop if needed to start work.
To start am aware of the lean condition procedure thread and intend to troubleshoot, just wanted to see if anyone might have some insight.
2nd owner, all maintenance records, 175000 miles, regular oil changes never missed one every 3500 miles, burns no oil.
I have neglected this issue for a while and it has gotten progressively worse I will try to describe symptoms.
It was a DD for years but for the last few years it only drives approx. 2 times a week or so.
I have had this code and check engine light for a few years and ignored it, mostly because it never had any issues at all.
The P0174 lean bank 2 engine code tripped at 55mph and 2255 rpm on the freeze frame and NEVER included a P0171 ever.
As time has passed the fuel economy has gotten progressively worse, I began experiencing hard start ups in our cold winter. So cold/hard start unusually high spike to about 2000rpms than it would drop to 750rpms like it was going to stall, than would grab on to idle at normal 1100ish cold idle and drop back down once warm to 750-800 rpm.
As time has passed that got worse, to the point that after hard/cold start to just over 2000rpms(same symptoms as described above) except now on the drop off it would go to 500rpm and bog until I gave it throttle to get it back to normal cold idle. KEEP in mind this is also intermittent between these first few symptoms described, sometimes it would start fine?
Now it finally got to the point that it would cold/hard start 2000+ rpms (same symptoms) than drop to 500 rpm and without gas stall out, but restart fine after a few seconds of throttle it would warm up and regulate itself.
As these symptoms all got worse the idle got worse with them as well, fluctuating a up and down a few hundred rpms, just kind of searching/surging
Lol, Now it stalled and wont start. The Old Explorer gave me all the signs she could, and the honest truth is I have been searching the forums frequently and assembling a parts list to do a major tune up. As I went to start truck to move to shop 50 meters away, to start work on her, she wont start, sounds like she wants too, but wont.
After a visual inspection I have noticed that there is some swelling and oil weeping on the vacuum line from the IM that comes from the Brake booster. The build up is right at the IM connection side.
The CPS cam positioning sensor on drivers side valve cover has oil build up on and around, and that same valve cover has began weeping since switching to synthetic finally last oil change,
I also have an exhaust leak at my muffler.
My original diagnosis was IM leak, So I ordered gaskets, all of them including, IM, valve covers, egr tube gasket, fuel injector grommets to service them. And the regular maintenance that needed to be done, PCV, fuel filter, trans filter, spark plugs and all fluids, etc. Also was going to do typical IAC and MAF cleaning.
If there is any thing I forgot let me know.
Any help is appreciated guys, I am going to go try to start once more, that will push to shop if needed to start work.