Car is in limp mode and getting P0087.

[chosonnom]

At first it started to lose power adter a stop.

Engine wont rev past 2800 and pick up is super slow. Nothing overheating. No other issue. Pulled over turned off ignition and waited 3 mins and restarted. Everything ran fine.

After 2 days. Happening again this time with P0087 code and engine light on. It is fuel rail/system pressure too low error. Car starts fine. Idling stutters only some times.

Anyone experience this issue?

Car has 48k miles and its 2013 Genesis 3.8

 

[jep604]

At first it started to lose power adter a stop.

Engine wont rev past 2800 and pick up is super slow. Nothing overheating. No other issue. Pulled over turned off ignition and waited 3 mins and restarted. Everything ran fine.

After 2 days. Happening again this time with P0087 code and engine light on. It is fuel rail/system pressure too low.

Anyone experience this issue?

Car has 48k miles and its 2013 Genesis 3.8

That's odd. Once you fix it, drive the crap out of it. My 2014 has almost 240K miles.

 

[chosonnom]

That's odd. Once you fix it, drive the crap out of it. My 2014 has almost 240K miles.

Have you ever replaced your fuel filter?

 

[jep604]

Have you ever replaced your fuel filter?

Not yet.

 

[Gunkk]

Inexpensive: Fuel filter (~$40)
Less expensive: Low Pressure Fuel Pump (~$700)
About the same: High Pressure Fuel Pump (~$600)
Very expensive (unlikely): HPFP lifter failure damaged the camshaft lobes. (up to several thousand depending on extent of damage, see below).

If the HPFP low side pressure is too low, check operation of the in-tank LPFP and/or replace the fuel filter and/or LPFP as appropriate. All of this is located under the back seat through an access panel.

If the HPFP high side pressure is too low, remove/inspect the HPFP and replace as appropriate.

While the HPFP is out, inspect the cam lobes for wear. If excessive wear is found, change oil and send a sample to an oil analysis lab to confirm wear metals (cam & HPFP lifter) in the oil. If "forbidden glitter" is indeed found in the oil via visual inspection (from HPFP lifter failure and/or cam damage), the analysis can confirm if other lubricated components (bearings) have been damaged (very very expensive).

A competent dealer or trusted local independent mechanic can do all of this. Nothing special here that requires a dealer. Just competent critical thinking that all good mechanics have. EDIT: Parts costs above from https://hyundai.oempartsonline.com/ a mechanic or dealer price may be double these amounts (to cover their procurement costs, profit, etc.).

Good luck!

 

[chosonnom]

Inexpensive: Fuel filter (~$40)
Less expensive: Low Pressure Fuel Pump (~$700)
About the same: High Pressure Fuel Pump (~$600)
Very expensive (unlikely): HPFP lifter failure damaged the camshaft lobes. (up to several thousand depending on extent of damage, see below).

If the HPFP low side pressure is too low, check operation of the in-tank LPFP and/or replace the fuel filter and/or LPFP as appropriate. All of this is located under the back seat through an access panel.

If the HPFP high side pressure is too low, remove/inspect the HPFP and replace as appropriate.

While the HPFP is out, inspect the cam lobes for wear. If excessive wear is found, change oil and send a sample to an oil analysis lab to confirm wear metals (cam & HPFP lifter) in the oil. If "forbidden glitter" is indeed found in the oil via visual inspection (from HPFP lifter failure and/or cam damage), the analysis can confirm if other lubricated components (bearings) have been damaged (very very expensive).

A competent dealer or trusted local independent mechanic can do all of this. Nothing special here that requires a dealer. Just competent critical thinking that all good mechanics have. EDIT: Parts costs above from https://hyundai.oempartsonline.com/ a mechanic or dealer price may be double these amounts (to cover their procurement costs, profit, etc.).

Good luck!

Thanks for the reply. Very helpful info. Now I just need to find a competent shop. Also car is still under warranty. I got half yr left

 

[Gunkk]

Well that's fortunate!

 

[chosonnom]

Well that's fortunate!

Today I got a response from the Hyundai techs. One injector seems to be stuck and not closing. It will be replaced.

Its staying open too long and causing it to not have enough fuel pressure for the other injectors. Who makes the injectors for Hyundai? Anyways once it comes in they will replace and then re test the whole fuel system.

If I search the web AI summary says it's a known issue. I have the 3.8 GDI.

I only have put what is considered top tier gas in this thing. Like Chevron, Shell, Exxon. But 87.

What could have caused this? Is it the carbon build up from GDI?

May be its time I retired this car and move onto something else.

 

[Gunkk]

Interesting. So it is high side. Not what I expected, yet makes complete sense. Cause can be a few things, mechanical failure of the injector itself (more likely), or debris in the fuel (less likely). If the other 5 go bad next month, the latter is much more likely.

Future-out-of-warranty-you can buy OEM Hyundai injectors for the 3.8 on rockauto.com. Part# HYUNDAI 353103C550, made by Hyundai Motor Group.

GDI carbon buildup occurs mostly in the head intake runners around the intake valves, because in GDI engines the PCV oil buildup isn't washed off the intake valves by intake port injectors, because there aren't any intake port injectors. On poorly maintained vehicles it can also build up around the piston rings, but that's not common in 1st gen Genesis sedans.

Carbon does not build up inside the fuel system, so rule that out.

I wouldn't dump a car just because one injector dies under warranty, but that's me. Unless of course I was looking for a bad excuse to get a new car ;-)

 

[chosonnom]

Interesting. So it is high side. Not what I expected, yet makes complete sense. Cause can be a few things, mechanical failure of the injector itself (more likely), or debris in the fuel (less likely). If the other 5 go bad next month, the latter is much more likely.

Future-out-of-warranty-you can buy OEM Hyundai injectors for the 3.8 on rockauto.com. Part# HYUNDAI 353103C550, made by Hyundai Motor Group.

GDI carbon buildup occurs mostly in the head intake runners around the intake valves, because in GDI engines the PCV oil buildup isn't washed off the intake valves by intake port injectors, because there aren't any intake port injectors. On poorly maintained vehicles it can also build up around the piston rings, but that's not common in 1st gen Genesis sedans.

Carbon does not build up inside the fuel system, so rule that out.

I wouldn't dump a car just because one injector dies under warranty, but that's me. Unless of course I was looking for a bad excuse to get a new car ;-)

I had the intake side cleaned with CDC GDI cleaner like at 20k miles but 7 yrs ago. It kinda makes sense but doesnt. I took best care of it as I could. Unless I got a bad fuel in there.

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