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Old 06-04-2011, 08:28 PM
bryanh bryanh is offline
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Join Date: May 2011
Posts: 23
Default Vacuum Line Pics for 99

I would consider myself to be a dangerous hobbyist when it comes to mechanical skills so some of you more advanced members please correct any information I post which is wrong or bad info. Only take one piece of line off at a time or you can get confused where it goes back on (I learned this the hard way....with plug wires ).

I have a Check Engine Light. I did some research and was given some great advice and a link pointing to a sticky talking about my code: the P0171 lean condition. The guys at Napa said it was most likely my Mas Air Flow Sensor (MAF) was bad, dirty, or I had a vacuum leak somewhere.

After seeing that awesome sticky for the newer trucks I figured vacuum lines were a great cheep place to start. I am not sure if the older trucks had a common vacuum line issue like the new ones but I figured some vacuum line pics would be in order.

I know my engine needs to be cleaned, so does the rest of the truck, I just bought it and it is a very slow process, but it will be up to speed some day......

This is the only line that had hose clamps:

This one was the hardest to replace, cause I used cheap line not the real molded Ford stuff:

Here is the other part of that line from above, it connected to a Y splitter at further down the line:

This plastic disk here (labeled with green arrow) what is it? It had 2 lines going to it. One from the air pipe it goes to the Y connector, then to the disk. The other one has a special plastic connector linking it to a hard line going under the truck. Any ideas what this is? Anyway, I am pointing to a vacuum line that can be replaced.

I will be happy to post pics of my cruddy line. I am going to clean the MAF tomorrow and go to NAPA to have the code cleared. I know I could pull the Battery cable to clear it, but I have another code (Transmission) and I dont want to pull cables yet.

I hope this helps some and I also hope someone can answer the mystery of the black disk.

1999 4 door XLT 4.0 Automatic

Last edited by bryanh; 06-04-2011 at 08:32 PM.
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