88 ford bronco

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  #1  
Old 08-20-04, 09:13 PM
wtfdissux
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Question 88 ford bronco

i have an 88 ford full-size bronco with a 351 Windsor (efi) auto transmission and four wheel drive
recently the exhaust has a really bad smell not like a convertor problem or too lean it is just bad almost like diesel after a few days of this took it into work and checked codes don't remember the number, can recheck tomorrow, but said it was lean. don't think this is right as am going thru gas like there is no tomorrow any ideas would be appreciated as there is a new baby in the house and don't like the fumes around her and am not gonna fix the missing tail pipe if the is other more major probs first


hunter certified allignment tech
general maintenence tech
 
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  #2  
Old 08-21-04, 03:57 AM
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You may have a bad or contaminated O/2 sensor. The code is saying the O/2 is reading lean which in your case may mean the sensor is incapable of reading rich which will make it command the computer to make it even richer. If it hasn't been replaced in a while, I would just go ahead and replace it for maintanance reasons if nothing else.
 
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Old 08-23-04, 08:42 PM
wtfdissux
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Exclamation still getting a false lean

replaced the O2 sensor with a aftermarket one same prob then tried one from ford still the same. also noticed that i am getting oil in the air filter replaced that and the breather element and still the same this drives me nuts i love the truck and even have another tho its got a 4 barrel not efi but the exhaust is REALLY BAD . ANY MORE IDEAS?
 
  #4  
Old 08-23-04, 09:48 PM
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Join Date: Aug 2003
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I was going to say..,

you haven't told us the whole story
Because I remember your '88 Bronco posts
I can't search all your posts, replies
(wtf?)
I gather you have more than one vehicle that's pretty close in specs?
Please make it clear
(sorry dude...WTF?...2 '88 Broncos?...1 4Bbl...1 EFI?)
wtf?...
I'm Confused
Sorry...
It may be a website malfunction and I am getting some weirdness but...
What is the story?
 
  #5  
Old 08-24-04, 09:02 PM
wtfdissux
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Unhappy 88 ford bronco

sorry after looking today it did not make sense my apologies
the prob. is with an 88 full size bronco 5.8 efi
am getting what i believe is a false lean code as the engine is going thru gas like no tomarrow (more than normal anyway). replaced the O2 sensor first with after market then fo mo co part, still same conditions. the exhaust is very offensive not sulfur like a convertor or eye burning as if it were lean. in addition have found oil in the air filter so replaced the breather and air filter and still no better.
any ideas appreciated and again sorry for last post
 
  #6  
Old 08-24-04, 10:14 PM
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What was the code #?
It's EEC IV right?
Sometimes those codes don't help much, but it could point the direction
No mass air (unless you added one), correct?
Are you getting smoke out the tailpipe? If so, what color?
It does sound like something is telling the EEC IV you need more gas
But what?
 
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Old 08-25-04, 08:26 PM
wtfdissux
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Question

will have to hook the scanner up tomorrow if get the chance i cant remember now. no there is no mass air no smoke that i notice at idle or while driving just a bad smell. there is some black soot on the end of the exhaust though and the muffler and tail are new (the prob. started before they were put on)
 
  #8  
Old 08-26-04, 02:55 AM
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if the computer is always setting a code 41 lean exhaust you might check for a loose or unhooked o2 ground wire should be orange in color and grounds usually to the engine possibly bolted on at the back of the head or at an intake bolt cant remeber for sure where the ground location would be or even if it applies to your vehicle as ford changed their o2 sensor wiring in the late 80's but if this ground is loose or unhooked it will set a code 41 and cause the engine to run rich.
also check the o2 sensor wiring to make sure it hasnt been melted together or bare around the exhaust.
 
  #9  
Old 08-26-04, 03:33 AM
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Sounds like Bejay is on the right track here. Any other cause for a rich mixture wouldn't be setting a lean code. Your sensor is obviously not seeing that for some reason which in turn will request more rich.
 
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