2009-2016 GMC Acadia (GM 3.6 Direct Injection) P0089, P0174, P228C High Pressure Fuel Pump

[@katzenpapa]

I replaced this on my GM 3.6 LLT. I was just driving one day, and suddenly my car went into limp mode, MIL flashing, and it was literally smoking like a freight train out of the tail pipe, and this was on a Friday after work in rush hour traffic on the interstate! I did the diag, and had to place HPFP. Pretty sweet job, so I decided to change the injectors while I was in there (this is a 2010 Lacroose btw) and getting fuel rail out took a lot of swearing! Btw, it says you are suppose to change those fuel lines since they crush in place, I changed all of mine just not to take any chances. I know you know that I was just saying for others who may not know.

[@automotiveinsight]

Awesome! I read your comment to someone else's question about scoping the injectors. I'm assuming you're a tech?

[@katzenpapa]

@@automotiveinsight No, I am not a tech. i really love working my on own cars (well I have family that work on cars so I have always known a little something about cars) and Iearning really good youtubers like yourself. I just recently started learning how to use the picoscope and the first thing I did was back probe injectors and I had a blast doing it. I am a biochemist by trade, so I love the science aspcet of automotive. I have som automitve content on this channel, but I started a second channel just for my car vidoes. Herre is the vidoe I made scoping GDI injectors on my GM 3.6 (LLT) let me know what you think, I'd love to know your feedback! kzbin.info/www/bejne/g4achaaHnM2HqaM&ab_channel=OneandDoneDIY

[@automotiveinsight]

Fantastic work! Great explanation of the theory and use of picoscope to demonstrate. You could easily be a master tech at any shop with your understanding and capability of learning what you have already on your own if the biochemist thing doesn't work out! That is advanced level diagnostics in our field and what separates parts changers from actual technicians. Keep it up. I've subscribed and will be watching from now on. I'm kind of lucky that Toyota has a ton of known good waveforms both in the repair manual and in the picoscope software they provide us. BTW, a good YT channel from a fellow Toyota tech is called voltage drop diagnostics. His name is P.J. and he's pretty sharp with pico too. I've picked up quite a few tricks from him.

[@oneanddonediy]

@@automotiveinsight Thanks for the feedback! If I could go back in time yes I love to be a GM master tech! I have considered getting into diagnosis part-time once I learn more, and practice more. I do find it enjoyable to figure the things out. Also, I'll check out your fellow youtuber's channel! Happy New Year!

[@rolannandlal4369]

Ok

[@roguemotors5433]

Great video . I have had several of these failures lately. 10 equinox (2.4l) , 12 Acadia ( 3.6l) and 15 Silverado (5.3l). All pumps failed AND had gas in oil. Definitely do oil change after this repair. Also had to replace ECM on equinox too( pump ran at full pressure 2400) when Ecu only commanded 600

[@automotiveinsight]

Thank you! That's interesting. I've only seen a few Hyundai/kia GDI engines leaking fuel into the engine. Good to know and thanks for sharing!

[@user-ff8es1tl9d]

I have a 2008 Enclave CXL AWD and it isn't in that location. I don't know where it is yet.

[@rolannandlal4369]

Thank you for this video

[@turboturbo5438]

Excessive use of E85 fuel can result in reduced engine power, MIL on and DTC P228C (fuel pressure regulator control performance - low pressure) set in the ECM as current or history.

[@MyBlackBenz]

Had P228C..Temps Dropped🥶using E85 added 87 gas to tank and went away, cleared the code on it's own..Try that first before spending money or replacing parts!

[@santiagoestebanfloresrodri6795]

good afternoon, the high pressure pump could be the cause of damage to the injectors of a 2011 Camaro V6 model

[@LosDaGhost973]

Will this make your car shake and feel horrible

[@brianhenry5992]

Thanks for the video it helped me change the pump on my 2011 traverse but I have a question when I tried to pull out the roller lifter to inspect it I couldn't get it out. It seemed that it was pushed past the notches it slides though and don't want to try starting it until I can find out if that's normal. Any help is appreciated

[@LosDaGhost973]

I have a 2010 gmc acadia All the systems u said. Codes popped up for p0089,p0019,p0300 really.need help with this car. Going crazy

[@Fabri7ioRonaldo]

High pressure fuel is fuel pump A?? Because in the scanner is giving me p0628 code

[@jd5179]

Dang- just in time

[@bahamatodd]

Both hard lines need to be replaced. The softer metal end of the fuel line is deformed to the shape of the fuel pump port to form the seal.

[@chazzwazer]

Would like to see how exactly to turn off the regulator w the scanner

[@shawnreimer2642]

Great video! If you don't mind me asking what were the symptoms this vehicle was having? I have got the same code, but I dont have live scanning and don't want to have to replace both pumps if I don't have to

[@automotiveinsight]

Thank you. The car would only rev up to about 1500-2000 rpm or so and was running poorly on top of that. It also had a “poor engine performance” message on display. I think you could probably do a loaner tool fuel pressure kit and test the low pressure side at the test port to eliminate that as a cause. I don’t recall the low pressure specs but I think it’s was like 50-100 psi or so.

[@shawnreimer2642]

@@automotiveinsight I appreciate the quick response! I will have to look into the loaner tool and see what's going on. Thanks again!

[@automotiveinsight]

@@shawnreimer2642 You're welcome and good luck! Thanks for watching.

[@jakenewkirk7440]

Is that anitsieze on that o-ring?

[@MrMarvin3180]

Does the roller that rides on the cam sit flush in the engine block or does it stick out a little?

[@josebarajas242]

Please answer this one

[@chazzwazer]

Beside the gasket should i use some silicone or other stuff to prevent leaks?

[@automotiveinsight]

No. I’ve found that usually ends up causing problems down the road.

[@ricardomarron1426]

I have a misfire on cylinders 1 & 6. Compression and spark are good. I removed the injectors and they did spray. Would this be part of a misfire?

[@chazzwazer]

Replaced the injectors on my traverse to. Mechanic says theres a problem with cylinders to, im triying to replace the valve 1st and see if that does it.

[@DatBawCasen_]

Let’s say I left my car running, came back out the store and it turned off and never started again. Would that be the problem, that’s what the engine code is saying it is? If I change that, would it start again? Please help !

[@automotiveinsight]

Maybe. I think the low pressure pump can cause the same codes though. You need to check the fuel pressures. We checked them with a scan tool.

[@victornaja7927]

hi so what is the silver canister looking thing on the radiator side. i actually though that was some kind of fuel pump

[@automotiveinsight]

It’s a vacuum pump.

[@drfirojtadavi]

very informative video, i just check fuel rail pressure of my gmc acadia 2010 with scanner its 1800 psi is it normal or what i need to look for

[@automotiveinsight]

Thank you. You need to compare desired pressure to actual pressure. Ours only desired 580 psi at idle. If yours does the same and has 1800, you’ve got some kind of regulator problem.

[@drfirojtadavi]

@@automotiveinsight thanks

[@oOohdaddy]

My acadia is 2011 it seem as similar setup i havent checked but does every year of these cars 2007-2012 have wires that go to high pressure pump

[@timothyhendrix516]

Can you check fuel pressure if the car wont start?

[@automotiveinsight]

Yes. A scan tool will still show the low and high pressure in the data list.

[@eloso313]

Anyone had any issues with the p0168 ?

[@vernhood4568]

Your assumption that disconnecting the wires on the pump will bleed off pressure is severely incorrect. Those wires are the control wires for the pressure solenoid. Disconnecting them causes the pump to run at MAXIMUM PRESSURE.

[@chazzwazer]

Yeah, i tried and didnt seem to work

[@guthriemason7529]

So how do I bleed pressure

[@vernhood4568]

@@guthriemason7529 Cover a fitting with a rag and carefully loosen the fitting until the fuel has safely drained into the rag, or wait overnight.

[@oOohdaddy]

Do you know what pressure on rail should be i replaced my injectors and my scanner is reading 8660 kpa is that normal or low

[@murknseasonn907]

I have a question. so long story short my check engine light came on, my cars engine power reduced. I was diagnosed by a mechanic that I needed to change the fuel rail pressure sensor. I changed that and my spark plugs. After I changed that I am still having the issue but also received codes for misfire. I received codes of P228C, P0089, P0151, P0157, P0300 and then I had a German mechanic/roadside assistance company look at it and they said that one side of my engine isn't getting fuel but he doesnt know why because hes not too familiar with my engine. So I'm not sure if changing the fuel pump is something I need to do. So before ordering the part I'm curious do you think this should be my next move? or maybe there is another issue? Thanks in advance!

[@murknseasonn907]

also he checked the front spark plugs but didn't have time to check the back ones and said it could possibly be wiring or the back ones...if that makes sense but i dont see it being the spark plugs because I did it exactly by the book/videos and none of them looked faulty.

[@automotiveinsight]

It’s possible, but I doubt it. When I see one side dead, I’m usually thinking more like a clogged catalytic converter or a valve timing issue (which are both fairly common). I would also look at the high side fuel pressure, I suppose a stuck open injector may bleed off too much fuel on that bank. At the end of the day, unless you want to fire the parts cannon at it, you should probably have it diagnosed by someone familiar with these engines.

[@phishhaley]

When I did this on a Chevy Captiva I had to rotate the motor by hand. How come you didn't need to do that?

[@automotiveinsight]

Rotate the motor by hand to do what?

[@phishhaley]

@@automotiveinsight It allows that piece to sit further back into the motor. From what I was told by multiple mechanics that had to be done in order to not mess up the high pressure fuel pump. Maybe they were wrong 🤷🏽‍♂️

[@automotiveinsight]

@@phishhaley the only thing I could think of is that if the fuel cam lobe was at the highest spot, then maybe putting the pump on would be difficult. I still wouldn’t think that it should be a problem as long as you slowly tighten each side, alternating from bolt to bolt. But I’ve only done 3 of these and I’ve never had any issues like that nor have I had to rotate the engine.

[@TayTay1930]

I have a 2009 Buick and I have it making a terrible whining noise when it tries to get up and go. It's shaking and telling me that all my spark plugs are firing. I just got done changing the high pressure fuel pump and it wasn't it. Have any idea what it could be? I don't have a tester to test it. It's not running good at all. It gets up to like 20mph and it's just loud and sounds like it's going to blow up.

[@TayTay1930]

It has the p0089 code as well.

[@automotiveinsight]

I think I would loan a low pressure fuel tester from an auto parts store and check the low pressure fuel first. The low pressure test port is really close to where you just were. A faulty low pressure pump can cause the same issue.

[@erikwright197]

Does this issue cause random misfire?

[@automotiveinsight]

It can

[@yoniroberto1672]

What would happen, if I don't let the air out

[@automotiveinsight]

If you don’t let the air out it would just take longer to start. If you don’t bleed the fuel pressure off you risk being injured by high pressure fuel spray when you loosen the nut.

[@alfredoflores9291]

Good night i hace e problem with acadia 2011 got the cod p0089 ando i hace lot a smok on the mofle smell puré gasoline can be the high presure pump? Thank You

[@automotiveinsight]

Sounds more like you have a bad injector. Probably either stuck open or not seating closed.

[@katzenpapa]

My HPFP stuck open when it died and you could basically smell raw fuel, and it was SMOKING white smoke like crazy. I would scope my injectors first if I were you. If they all have proper waveforms, it is most likley the HPFP.

[@calvinh208]

I'm chasing a misfire code on a 2009 Acadia. Anyone know of a good instructional video or forum for pulling the injectors? Also, I want to disconnect the fuel pump without disconnecting the whole fuel system control module so I can run the pressure out. Any help would be appreciated.

[@calvinh208]

Also, I've located a clicking sound on or around the hpfp, a little more than one click per second at idle. Maybe the HP pump or that cam driven roller?

[@chazzwazer]

So i replaced de fuel pump but tried to erase the codes and i think i messed up the cars computer. It wont start and goes kind of crazy everything clacking

[@raywise6386]

Dont do it like him youll bend the pump you have to rotate the motor by hand

[@phishhaley]

I just said the same thing