Any '15 - 17 owners had problems with LSPI?

[plumcolr]

Low speed pre-ignition, which can be catastrophic.

 

[99WhiteC5Coupe]

Low speed pre-ignition, which can be catastrophic.

.

No. Why do you ask?

I have a 2015 Expedition Limited 4x4, purchased new.

 

[07navi]

lispy lips ?

 

[plumcolr]

I'm trying to figure out if it's really an issue, and if so, how big of one. Mostly seems to happen at low rpm, upper gear, open throttle conditions.

 

[07navi]

I'm trying to figure out if it's really an issue, and if so, how big of one. Mostly seems to happen at low rpm, upper gear, open throttle conditions.

Sounds like spark timing. Years ago cars routinely pinged in fact the cab drivers often used the cheapest gas they could get and they pinged half the time but I would do a diagnostic test on it.

 

[plumcolr]

Not timing related. Cylinders develop hot spots at low rpm and boost which causes preignition.

 

[07navi]

Not timing related. Cylinders develop hot spots at low rpm and boost which causes preignition.

OK, I knew I would be wrong sooner or later

 

[lbv150]

No, because I run the recommended 93 octane, never ever ran anything lower in my'16.

 

[JasonH]

I run 87 octane for daily driving. No issues with pre-ignition.

 

[07navi]

There shouldn't be any ping with any gas and I am still leaning towards a timing problem but you really need to look into it.

 

[plumcolr]

07navi, look up LSPI on wikipedia. It is an abnormal condition which occurs on direct injection super (turbo) charged engines (occasionally) under low RPM high load conditions. It is DETONATION caused by a cylinder hotspot igniting the intake charge explosively and prematurely and has nothing to do with normal ignition timing. It can cause catastrophic piston / connecting rod failure. It could have been an issue on '15 to '17 expys and earlier F150s as the addition of port injection seemed to remove the condition.

I did further research and found that reformulated motor oil which the name brands are now doing makes the problem disappear, so I am no longer concerned.

 

[07navi]

07navi, look up LSPI on wikipedia. It is an abnormal condition which occurs on direct injection super (turbo) charged engines (occasionally) under low RPM high load conditions. It is DETONATION caused by a cylinder hotspot igniting the intake charge explosively and prematurely and has nothing to do with normal ignition timing. It can cause catastrophic piston / connecting rod failure. It could have been an issue on '15 to '17 expys and earlier F150s as the addition of port injection seemed to remove the condition.

I did further research and found that reformulated motor oil which the name brands are now doing makes the problem disappear, so I am no longer concerned.

So what is the cure for this phenonium ?

 

[chuck s]

No, because I run the recommended 93 octane

Recommended? By whom? Engine runs fine on the fuel it's designed for -- 87 octane. Undeniable it has more power with more expensive and needless higher octane but that's a different question. 93 octane isn't mentioned at all. Yeah, I'll fill with 93 when towing my travel trailer in the summer but otherwise don't bother.

Ford:

Your vehicle is designed to operate on
regular unleaded gasoline with a minimum
pump (R+M)/2 octane rating of 87.
...
For best overall vehicle and engine
performance, premium fuel with an octane
rating of 91 or higher is recommended. The
performance gained by using premium fuel
is most noticeable in hot weather as well
as other conditions, for example when
towing a trailer. See Towing (page 202).

-- Chuck

 

[LokiWolf]

Recommended? By whom? Engine runs fine on the fuel it's designed for -- 87 octane. Undeniable it has more power with more expensive and needless higher octane but that's a different question. 93 octane isn't mentioned at all. Yeah, I'll fill with 93 when towing my travel trailer in the summer but otherwise don't bother.

Ford:-- Chuck

You answered your own question.

Right there is what you quoted from the manual, it says “recommended”. That is what gives you “best performance”.

Again, one more time. The EB is tuned from the factory for 91+, it detunes for anything less. Buy a 60K vehicle and worry about less than the cost of 2 Starbucks coffees in price difference per tank. To me it just makes no sense, but that is your call.

The recommended fuel for ANY EB is 91+, will it run without damage on 87, yes. With less power, especially under high load conditions like towing, fully loaded, or extreme heat.


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[LokiWolf]

In addition, LSPI can be mitigated, or decreased in possibility by increasing Octane. Ethanol treated gas(evaporative cooling) also helps. Like the OP said, better oils(Synthetics and Blends) also helped to prevent it. Straight Dino does not come from the factory in any of the EB’s I have owned(15,17,20 Expedition, 16 Edge Sport, 20 Explorer ST). Most are Blends, and the ST is getting Full Syn.


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[chuck s]

Premium is only recommended for specific conditions, not as a universal fuel. Performance is more than adequate with 87 octane, "best performance" is only needed occasionally. 60¢/gallon additional cost for 93 here regardless of what 87 sells for.

-- Chuck

 

[LokiWolf]

Premium is only recommended for specific conditions, not as a universal fuel. Performance is more than adequate with 87 octane, "best performance" is only needed occasionally. 60¢/gallon additional cost for 93 here regardless of what 87 sells for.

-- Chuck

The statement does not say under “specific conditions”, the better performance is just more noticeable under high load conditions.

91+ is always recommended, but not required.



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[lbv150]

Well close to 40K on my '16 and it only received Shell Premium it's whole life so far. I am very pleased with the performance and it is very fun to drive, almost as fun as my '85 Must GT. It blows away other vehicles that dare to try me.

 

[Boostedbus]

It blows away other vehicles that dare to try me.

Lol.... I was undefeated up until last weekend heading to my WV getaway cabin. My wife and I noticed two trucks up ahead running side by side trying to taunt each other behind traffic on a 2 lane. The one truck was a loud Ford King Ranch 6.0 Diesel with a monstrous pipe that was rolling coal every chance he got, and the other was a newer half ton Silverado. I snuck up and pulled the Chevy when traffic cleared and got between the two going back to single lane. I told my wife we are gonna see exactly what the KR has in a couple of miles when it goes back to two lanes on the long hill climb up the next mountain. Sure enough as soon as we got there he jumped over in the right lane and hammered the oil burner rolling soot out the pipe. I of course gave it all she had to offer and while the KR and I gapped the Chevy by bus lengths, he was gapping me by inches. I couldn’t reel him in. I’ve driven my buddies Harley Davidson edition 6.0 with a Bully Dog programmer in extreme mode before, but I think this King Ranch had a lot more mods, especially exhaust. My wife and I did get a good laugh at the guy in the Silverado who brought the knife to the gun fight. We were loaded down with our usual luggage, food, 2 dogs, tools, a new love seat glider in a big box,and a hitch basket with a big cooler on it. I told her that dude in the Chevy just got his ass drug by Clark Grisswald in the “Family Truckster” !

 

[LokiWolf]

Lol.... I was undefeated up until last weekend heading to my WV getaway cabin. My wife and I noticed two trucks up ahead running side by side trying to taunt each other behind traffic on a 2 lane. The one truck was a loud Ford King Ranch 6.0 Diesel with a monstrous pipe that was rolling coal every chance he got, and the other was a newer half ton Silverado. I snuck up and pulled the Chevy when traffic cleared and got between the two going back to single lane. I told my wife we are gonna see exactly what the KR has in a couple of miles when it goes back to two lanes on the long hill climb up the next mountain. Sure enough as soon as we got there he jumped over in the right lane and hammered the oil burner rolling soot out the pipe. I of course gave it all she had to offer and while the KR and I gapped the Chevy by bus lengths, he was gapping me by inches. I couldn’t reel him in. I’ve driven my buddies Harley Davidson edition 6.0 with a Bully Dog programmer in extreme mode before, but I think this King Ranch had a lot more mods, especially exhaust. My wife and I did get a good laugh at the guy in the Silverado who brought the knife to the gun fight. We were loaded down with our usual luggage, food, 2 dogs, tools, a new love seat glider in a big box,and a hitch basket with a big cooler on it. I told her that dude in the Chevy just got his ass drug by Clark Grisswald in the “Family Truckster” !

Bully Dog is a completely terrible Tuner on the 6.0, especially if he is running the canned BullyDog tunes.

If the 6.0 is running any reputable tuners Custom tunes and has an EGR Delete and Studs, which I would assume this guy had, then you cannot touch him going up a Mountain, exhaust or no exhaust. He is putting down way more Torque than you and is probably close to you on HP. Weight wise, you loaded probably comes close to matching him unloaded.

Owned a 2006 F250 with the 6.0 for 10 years. It had 7.5 Inches of lift on 35’s, was Studded, EGR Cooler Deleted, Aftermarket Oil Cooler, Volant Intake, Volant Turbo back Exhaust. It was running QuickTrick’s Looney Street most of the time, even when pulling a Car trailer weighing in around 10K. Just watched my Exhaust Temps, and it pulled like a champ. Climbing, it never skipped a beat.

With a tune though you could have run with him, especially unloaded.

I miss my 6.0! Loved the sound of the diesel, especially when that turbo spooled up!


Towing a friends Chevy that broke down!



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