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post #1 of 12 (permalink) Old 08-26-12, 11:33 AM Thread Starter
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confused 2001 expo w/5.4 confused help tired of lumps on head from wife

ok first let me say im new here but let me get to the point. I am having a few issues first ill start with the codes im am getting a p0174, and a p1071 witch apparently is saying banks 1 and 2 are running to lean o171 being bank one and 0174 bank 2 last summer i replaced all 4 o2 sensors . the service engine light is of course on it runs Rough at An Idle and Some Times dies at a light today i found a massive hole in the tubing connector to the pcv valve and replaced it now the idle is much lower and still a bit rough at times. one question is could the air cleaner be to dirty and causing some of this? or should i keep looking i know a an air cleaner would be the cheep thing to test at this point but money is tight right now. Next thing the cruse control has stoped working and i am wondering if its a vacuum leak someplace due to when it stopped used to you could romp on the gas and it would then set but not now the cruse light just will flash once when you try and set it now .
i hope this enough info to help me if not ask me and ill give more. i am just at a loss if this were earlier model auto i could get it figured out

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post #2 of 12 (permalink) Old 08-26-12, 11:44 AM
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

If the air fllter was very dirty it would cause engine to run richer .Checked the plugs recently and any other vac pipes/ hoses ?
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post #3 of 12 (permalink) Old 08-26-12, 11:55 AM Thread Starter
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

thats what i was thinlking about the air filter. I changed the plugs in april and one of the coil packs because i broke one trying to check all the hosees as we speak also changed the full filter in april due to simular prob flugs caused it to run smoother but its still not right so here i am
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post #4 of 12 (permalink) Old 08-26-12, 12:04 PM
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

Possibly another of the coil packs breaking down under load ? No signs of any tracking / shorting ? Not sure about the cruise control on that car but if it has switches at pedals as most do , worth checking .
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post #5 of 12 (permalink) Old 08-26-12, 01:52 PM Thread Starter
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

i did discover that apparently cruse is no longer ran with vacuume there is only a plug that plugs in. On a side note would the selector position marker being off prevent it from going into cruse ? as right now r=p ,n=r,d=n,2=d and so fourth
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post #6 of 12 (permalink) Old 08-26-12, 03:24 PM
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

Unplug the MAF sensor and see how it runs. Post back.

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post #7 of 12 (permalink) Old 08-26-12, 04:04 PM Thread Starter
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

ok will do. its idle has smothed out so far thru the day . will this posibley work thru the lean codes?
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post #8 of 12 (permalink) Old 08-26-12, 04:45 PM
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

Many lean codes are caused by a dirty or defective MAF.

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post #9 of 12 (permalink) Old 08-27-12, 04:11 PM Thread Starter
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

ok cleaned maf today with electrical cleaner and unpluged the neg cable while i changed thermostat on my other trk so all the codes would clear now to see if the combo of the vac leak on pcv and cleaning the maf cured it
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post #10 of 12 (permalink) Old 08-29-12, 09:01 AM Thread Starter
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Re: 2001 expo w/5.4 confused help tired of lumps on head from wife

ok all appears good, No service engine soon light so far. I have been having my wife put it through its paces as she would any other day i am happy shes almost happy now to figure out why cruse isin't working surly it isint the just over 170,000 miles on it
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