HI, I'm new here but I am familiar with iATN if that helps, I have a 95 Continental that belongs to my parents that I have been chasing far a year or so. This thing keeps lean mix codes for banks 1 and 2. It also keeps a BARO reading of 147Hz. The BARO reading I know is wrong due to the fact I am near 1000' above sea level. I tried cleaning the MAF and then replaced it with a "new" (reman) unit from the dealership. I still have the same readings. I tried running the WOT 3 times and trying to reset it after the new installation but still the same reading. I am about to the point of pulling the intakeand physically looking for a vacuum leak even though I can't find one anywhere. I did replace the IAC valve a few months ago due to the fact they complained it was stalling occasionally with a low idle. This was also purchased from the dealer. I did notice the other day after a hot soak I do have a definite misfire problem. This thing acts like it is running on 5 or 6 cylinders until you limp it back out on the road and get up to speed. Once you get it moving through the air I guess whatever is causing the problem cools back down. I did have someone say they had an E-series acting the same and it was a camshaft position sensor that repaired his but it was just a single overhead cam 5.4 not this sual overhead cam 4.6. I would try the camshaft sensor due to age and mileage (170000 miles) but I don't like to just through parts at one. I've already done that enough on this one. If anyone has any idea which way I need to go I would really appreciate the help. Like I say, this is my parents car and I would really like to repair it if I can. I have over 20 years experience on diesels I just need a little help on this one. Thanks.
Lean codes on 95 Continental
- Thread starter rlervin
- Start date
Sorry for getting back so late. I haven't been able to get to my computer. The only codes in this thing are P0171 and P0174. I went ahead and picked up another MAF from the dealer but I haven't installed it yet. I did get in the car yesturday and noticed the frequency was 144hz. I believe this is the problem because the altitude around here is only around 1000' above sea level. I should be seeing a reading of somewhere around 155hz. That is a common reading I get on other ford cars from this time period. I am going to look at the wiring to the MAF on this car. It looks as if someone has taped up the harness from the bracket where it plugs in to the breather assm. I'll let you know what I find there if anything also. If there is a problem with the wiring there could it have affected the performance of the MAF causing the MAF to help calculate the wrong BARO reading?
I just checked the wiring to make sure nothing was shorted together there at the breather harness and everything checked out good. I went ahead and installed the new MAF in the housing and noticed that there is nothing in the breather housing to seal where the MAF slides up in the breather housing. Is there supposed to be a seal or a gasket of some type to seal the end of the MAF before it goes into the intake hose? This thing appears to be able to move around in the housing and can actually draw air around the MAF. Has anyone noticed this before?
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Hmmm...there shouldn't be ANY air getting past the MAF that is unmetered. Thatbwill cause a lot of drivability issues. Try removing the air box and putting the MAF right in the air tube and tightening it up. The airbox has a built in air silencer so be sure that you're not mistaking this as a large unsealed portion as it can appear that way when you look inside towards the engine through the MAF.
Hmmm...there shouldn't be ANY air getting past the MAF that is unmetered. Thatbwill cause a lot of drivability issues. Try removing the air box and putting the MAF right in the air tube and tightening it up. The airbox has a built in air silencer so be sure that you're not mistaking this as a large unsealed portion as it can appear that way when you look inside towards the engine through the MAF.
I can't install the MAF directly into the air hose. The diameter of the hose is alot larger than the MAF. It must be at least an inch difference. It looks like there might have possibly been a rubber seal at the end of the MAF to possibly seal the end of it where it mates up to the housing.
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Ok, I get what you're saying. Does the MAF even stay in the tube? What's holding it together? You could always hit the junk yard and pick up another box to see what's missing.
Ok, I get what you're saying. Does the MAF even stay in the tube? What's holding it together? You could always hit the junk yard and pick up another box to see what's missing.
That is the housing. The MAF is bolted to the inside of the housing to basically a flat plate. It then slips down inside the housing and the plate snaps in to hold it. Where the other end of the MAF is in the housing, it doesnt slip into a rubber seal or anything. If the plate is not secured correctly it looks to me that unmetered air can be directed around the end of the MAF. There are 4 holes at the end of the housing around the outside of the MAF that appears to be able to allow airflow around the sensor if it is out of alignment. I may be making a big issue of this. What I really need to do is assembly the entirebreather off the car and see if the MAF is out of alignment with the engine end of the housing.