1997 - 2003 F-150

Just Lowered The Back More And P0171???

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Old Jul 14, 2014 | 02:28 PM
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Just Lowered The Back More And P0171???

what the crap! I have a 1997 f150 with a 4.6L... I lowered it with JLP shackles and decided to go lower with the belltech 4" rear drop... Well I pulled the bed to put the brackets on... whats crazy is when I got done it runs like crap, very sluggish but idles well... the only thing I can think of is a vacuum line on the evap is off or I left a plug undone... does anyone have any pictures of the evap system?
 
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Old Jul 15, 2014 | 10:46 AM
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Threw another code of P0174. Cleaned the MAF, no change. Then I checked the pressure and it only has 22/24 lbs of fuel pressure at the rail. I put a new regulator on last night but didn't help. The filter only has about 10K miles on it. This will be the second Airtex fuel pump. Garbage!! I bought a Bosch this time, we'll see how it does.

Can someone post up what specs it needs with the KOEO and KOER please?
 
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Old Jul 17, 2014 | 05:20 PM
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really helpful place... great site...
 
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Old Jul 17, 2014 | 06:01 PM
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Post in the suspension or engine forum.

But it sounds like you only lowered the rear end, but somehow have an issue with the motor? Or did I miss something and you went lower in the front and rear?
 
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Old Jul 17, 2014 | 08:21 PM
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because I don't believe in coincidence I think you accidentally did something when you had the bed off. Kink a fuel line? unplug a vacuum line?
 
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Old Jul 17, 2014 | 08:23 PM
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you should have close to 35-40 psi
 
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Old Aug 12, 2014 | 10:19 AM
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it actually turned out to be the fuel pump, I checked all the lines to make sure nothing was pinched and no vacuum lines left off or pinched
 
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Old Aug 12, 2014 | 01:04 PM
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Tell us, what was your post #3 all about?
 
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