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high pressure fuel pump on GDI #4621247
01/01/18 11:05 PM
01/01/18 11:05 PM
Joined: Feb 2008
Posts: 655
texas
joel95ex Offline OP
joel95ex  Offline OP
Joined: Feb 2008
Posts: 655
texas
anyone change one of these on a hyundai or kia? i got a code p0087 low fuel system/rail pressure. the car idles fine but when under load/acceleration it stumbles. everything i read indicates it is this pump. i don't trust the local dealership and my mechanic who i use for things i won't do like a head gasket --and always does a good job, says they haven't had to change one before. that doesn't make me feel very good. thinking about doing it myself and was wondering if anyone has changed one--- i've changed regular fuel pumps before but not one of these--cam driven on the head--new to me


95 Accord 4cyl Vtec. 500,000+miles. RIP 😢
2013 sonata 117k miles
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Re: high pressure fuel pump on GDI [Re: joel95ex] #4621253
01/01/18 11:19 PM
01/01/18 11:19 PM
Joined: Jul 2003
Posts: 4,894
New Zealand
Silk Offline
Silk  Offline
Joined: Jul 2003
Posts: 4,894
New Zealand
Most common problem with the old Mitsubishi GDI was the fuel filter blocking at the pump. These are just a small filter same as used in an injector. I don't know if they carried that sort of technology over to Hyundai, but it'd be the first place I'd look before pulling a pump.


1987 BMW R65 - Aegis SAE30
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: high pressure fuel pump on GDI [Re: joel95ex] #4621261
01/01/18 11:26 PM
01/01/18 11:26 PM
Joined: May 2015
Posts: 973
Missouri
gabriel9766 Offline
gabriel9766  Offline
Joined: May 2015
Posts: 973
Missouri
Originally Posted By: joel95ex
anyone change one of these on a hyundai or kia? i got a code p0087 low fuel system/rail pressure. the car idles fine but when under load/acceleration it stumbles. everything i read indicates it is this pump. i don't trust the local dealership and my mechanic who i use for things i won't do like a head gasket --and always does a good job, says they haven't had to change one before. that doesn't make me feel very good. thinking about doing it myself and was wondering if anyone has changed one--- i've changed regular fuel pumps before but not one of these--cam driven on the head--new to me
Alldata calls for .5hr to do the job. Sits right on top the motor.


2015 Malibu LT 2.5L PPPP 0w20 46.1K
2007 Escape XLT 3.0L 5Q STHM 5w30/1Q MC full syn 5W20 115K
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2008 Escape XLT 2.3L MC 5w30 187K
2007 Fusion SE 2.3L- 173.5K STHM 0W20
Re: high pressure fuel pump on GDI [Re: joel95ex] #4621275
01/02/18 12:08 AM
01/02/18 12:08 AM
Joined: Jun 2011
Posts: 1,172
SE Ohio
MuzzleFlash40 Offline
MuzzleFlash40  Offline
Joined: Jun 2011
Posts: 1,172
SE Ohio
On the 2.4 it is right under the plastic engine cover on the back side of the engine toward the firewall.


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Re: high pressure fuel pump on GDI [Re: joel95ex] #4621288
01/02/18 01:05 AM
01/02/18 01:05 AM
Joined: Aug 2017
Posts: 663
MN
14Accent Offline
14Accent  Offline
Joined: Aug 2017
Posts: 663
MN
Looks pretty easy reading the service manual. I wouldn't be afraid to tackle the job, I'm sure your mechanic can handle it.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2003 Cadillac Seville STS - The winter "beater", it uses the Volt's fuel
Re: high pressure fuel pump on GDI [Re: joel95ex] #4621359
01/02/18 06:29 AM
01/02/18 06:29 AM
Joined: Oct 2008
Posts: 19,193
Sunny Florida
SteveSRT8 Offline
SteveSRT8  Offline
Joined: Oct 2008
Posts: 19,193
Sunny Florida
C'mon, fuel pumps were mechanical and ran off the cam in cars for decades before GDI.

It's a simple swap, looks downright easy...


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
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Re: high pressure fuel pump on GDI [Re: joel95ex] #4622126
01/02/18 07:31 PM
01/02/18 07:31 PM
Joined: Apr 2007
Posts: 2,997
WI.
dblshock Offline
dblshock  Offline
Joined: Apr 2007
Posts: 2,997
WI.
lube the fuel with TCW-3 for a week, then decide.


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Re: high pressure fuel pump on GDI [Re: joel95ex] #4623031
01/03/18 06:26 PM
01/03/18 06:26 PM
Joined: Nov 2010
Posts: 808
VA
Thax Offline
Thax  Offline
Joined: Nov 2010
Posts: 808
VA
It is a pretty simple job. The high pressure fuel pump normally put out 500-650psi at idle and 1300-1800psi under load. P0087 and your symptoms match a failed GDI fuel pump. To replace its easy , relieve the fuel pressure by pulling pump relay, undo 19mm barrel nut on fuel pump. Lastly two 10mm bolts hold the pump in place , evenly remove these . Installation is pretty much the reversal , just make sure to tighten down the 10mm bolts holding the pump to the head evenly.


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