Fuel Pressure Regulator - Chevy and GMC Duramax Diesel Forum
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Old 01-09-2012, 04:16 PM   eBay Motors  #1 (permalink)
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Fuel Pressure Regulator

So I've been playing with all the PID's on my insight. Set my DFRP and FRP to watch for a while. Did these bc my truck lopes to a stop when it cold like crazy and still does it to a lesser degree when it's warm. I know it's not my AD - Hooked a gauge up - 8 psi...

Anyways when my truck is cold and on startup it calls for 6200 psi DFRP actual is the same. As it warms up it will get down to 4900 desired and actual.

I do not have elevated or high idle - is it normal to be up at 6200 on startup?

When I come to a stop it lopes as i said earlier. They actual stays much higher than the desired when coming to a stop or going down hill.

Checked DTC codes - p0089 fuel pressure regulator - duh....

Along with the code, are these signs that it's going out???

It's not surging at idle, or bucking around...

And the injectors are fine - did them in November
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Old 01-09-2012, 07:00 PM   eBay Motors  #2 (permalink)
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Old 01-09-2012, 07:12 PM   eBay Motors  #3 (permalink)
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Mine does the same at startup.
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Old 01-10-2012, 04:40 AM   eBay Motors  #4 (permalink)
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Bump for the morning crowd...

Should my actual FRP remain higher than my desired when coming to a stop or going down hill?? Is this my fuel pressure regulator going out, based on this and the above?
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Old 01-10-2012, 05:34 AM   eBay Motors  #5 (permalink)
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Sticking FPR replace it, it will just get worse.................
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Old 01-10-2012, 05:40 AM   eBay Motors  #6 (permalink)
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Thank you sir. Basically what I thought, just wanted someone smarter than me to tell me

Looked it up on alldata- do ALL those connections really have to be unplugged? Some tod them aren't even close to the valley...
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Old 01-10-2012, 05:52 AM   eBay Motors  #7 (permalink)
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I just unplugg what ever is in the way............

Just make sure to unhook both your batteries before starting.............

It is really not that hard, the torques on the FPR are the worst part of it. I made an extended bit to help out a bit and had a buch of swivel and wobble extensions...........
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Old 01-10-2012, 06:05 AM   eBay Motors  #8 (permalink)
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Good deal. That's usually what I do, but this one just seemed odd w all the connections listed to unplug. Thought id check. Now I just hope the part store has one as diesel anything is what they are always out of inventory on.

Might have to order one w my luck...
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Old 01-10-2012, 06:15 AM   eBay Motors  #9 (permalink)
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Merchant has them for a decent deal.............

Had the last one from them in 2 days.................
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Old 01-10-2012, 06:21 AM   eBay Motors  #10 (permalink)
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Yeah they're always quick. Got my fuel rail lines in 3 days last month and one was a Saturday
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