1997 5.4 Check engine light
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From: ND
1997 5.4 Check engine light
I have a 1997 4x4, 5.4, check engine light is on. I had it scanned with a Snap-on m2500 (I think), said bank 1 and bank 2 burning lean. I had run it real low on fuel so I had them reset it. Light came on again, same thing. Any thoughts of what it is? I don't feel like paying the dealership hundreds to replace a part that I can do myself.
Thanks,
Pete
Thanks,
Pete
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Hotshot
Joined: Jan 2004
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From: St Louis
If you perform a SEARCH on the actual code numbers (probably P0171 & P0174), you will find that this much discussed combination is usually due to a vacuum leak, most often due to the PCV hose or its fittings.
Steve
Steve
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Engine light
Hello, How are you? I was wondering if what that other person said about the PCV fittings, hose thing worked? My check engine lights comes on like after 4 hours of driving??? Any ideas? Thank you. Have a great day.
Heidi
Heidi
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Joined: Apr 2005
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From: Dallas, Ga
Take a can of brake clean and spray around vacuum hoses namley the pcv hose it goes into a port at the rear of the intake and the rubber fitting in the back likes to tear. You'll haer it when it sucks in the brake clean if it's a big leak if it's small then you'll hear a slight variation in engine speed, but run lean both banks almost always means that there is a vacuum leak. Oh yeah check for rodent damage on the hoses too, don't forget the ones near the brake booster! If your truck has sat up for a while or doesn't get driven much rodents like to make your engine bay dinner and home!
Hotshot
Joined: Jan 2004
Posts: 19,768
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From: St Louis
Originally Posted by Heidi6311
Hello, How are you? I was wondering if what that other person said about the PCV fittings, hose thing worked? My check engine lights comes on like after 4 hours of driving??? Any ideas? Thank you. Have a great day.
Heidi
Heidi
Without the actual codes, it is nearly impossible to troubleshoot the reason for a CEL.
Once you have the code(s), perform a SEARCH on them to see if there have been previous discussions about them. If you then need additional help, just ask.
Steve
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Does your engine also idle real high. I had this problem with my truck and found that the PCV valve was bad. It was stuck open and allowing too much air to the engine. After i replaced it the problem never came back again.
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When I first bought my truck in May of this year I had those codes come up, my vaccum system was fine so I changed the upstream o2 sensors and it cleared up the problem. ran better and got better gas milage as well.
Lance
Lance
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Joined: Jun 2005
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From: North west La
I had those codes when the vacuum lines were bad on my truck. I replaced all of them before I got it quit throwing codes. My truck is a 97 & all the lines were bad. Its running like new now so I guess it was worth the time & money. The way Ford ran some of these lines causes them to fail due to heat IMO
