Ecoboost waste gate/bov problem
07-21-2018, 12:53 PM
#161
Senior Member
My truck has begun making a very weird sound. First time it happened couple weeks ago caught me off guard so much I didn't even think it was my truck. But it happened again yesterday and can confirm its my truck making it. You know when you are listening to the radio and a severe thunderstorm warning comes across...that loud annoying electronic warning sound....it kinda sounds like that.
I have no idea where it's coming from...but I'm noticing I've been getting blips in my rpms when I'm going up hills. At first I thought they were misfires but I'm beginning to wonder if my torque converter is going and maybe that's where the sound is coming from.
Or maybe it's still related to the wastegates/bovs as discussed here...I dunno going to have to keep investigating
I have no idea where it's coming from...but I'm noticing I've been getting blips in my rpms when I'm going up hills. At first I thought they were misfires but I'm beginning to wonder if my torque converter is going and maybe that's where the sound is coming from.
Or maybe it's still related to the wastegates/bovs as discussed here...I dunno going to have to keep investigating
01-15-2019, 03:26 PM
#162
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Surging ecoboost
Does it sound like this? Ecoboost wastegate problem at -2 degrees - YouTube Ecoboost wastegate problem at -2 degrees - YouTube
01-15-2019, 04:37 PM
#163
Senior Member
02-26-2019, 07:33 PM
#164
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I've been dealing with this issue for years now in my 2013.
Yesterday I changed the BOV as I hoped it was a ripped diaphragm in the BOV. Cleaned & Tightened all tubes, signs of a few leaks around one turbo and the CAC.
No such luck, still the same. Reflashed to stock, reset cam, and every other thing I could.
Problem is exactly the same with 5* 87P/T tune, just magnified worse because of the extra power when it works right.
My symptoms: medium steady throttle acceleration, 1500 to 2500 rpm there is a "hesitation, lag, power loss" where you can hear the hissing BOV letting off boost. I did this while venting to Atmosphere and it confirms that the sound is coming thru the BOV system. Truck accelerates sluggish during this time unless you floor it hard.
When rpms hit 2500 everything seems to correct itself and wham! Crazy hard acceleration from then on, especially if you were squeezing the throttle down to push thru the lag period.
Steady throttle in this rev range results in surging and rpm fluctuations until it catches and goes when over 2500 rpm.
Very annoying to drive normally. Really light or really heavy throttle is better but not perfect.
No alarms or codes. Ever.
Power is terrific, tows like a beast. Always have great boost, even when problems are occurring.
Never a CAC issue. (hole drilled)
Stock or tuned it's a consistent problem.
My question : at half the price I paid for the BOV, should I try the part bl3z9b325c?
Seems likely that this is a problem that this would cause.
Anyone else have this issue and tried fixes? Win or lose?
Timing chain, wastegates, hoping this problem is not it.
It's been doing this since before 20,000 kilometres, now at 80,000. Being so new it makes me doubt timing chain. But I did hear the chain slap on start a few times in the first year of ownership, and its never returned.
Will appreciate any help, I'm not the only truck around here behaving like this.
Yesterday I changed the BOV as I hoped it was a ripped diaphragm in the BOV. Cleaned & Tightened all tubes, signs of a few leaks around one turbo and the CAC.
No such luck, still the same. Reflashed to stock, reset cam, and every other thing I could.
Problem is exactly the same with 5* 87P/T tune, just magnified worse because of the extra power when it works right.
My symptoms: medium steady throttle acceleration, 1500 to 2500 rpm there is a "hesitation, lag, power loss" where you can hear the hissing BOV letting off boost. I did this while venting to Atmosphere and it confirms that the sound is coming thru the BOV system. Truck accelerates sluggish during this time unless you floor it hard.
When rpms hit 2500 everything seems to correct itself and wham! Crazy hard acceleration from then on, especially if you were squeezing the throttle down to push thru the lag period.
Steady throttle in this rev range results in surging and rpm fluctuations until it catches and goes when over 2500 rpm.
Very annoying to drive normally. Really light or really heavy throttle is better but not perfect.
No alarms or codes. Ever.
Power is terrific, tows like a beast. Always have great boost, even when problems are occurring.
Never a CAC issue. (hole drilled)
Stock or tuned it's a consistent problem.
My question : at half the price I paid for the BOV, should I try the part bl3z9b325c?
Seems likely that this is a problem that this would cause.
Anyone else have this issue and tried fixes? Win or lose?
Timing chain, wastegates, hoping this problem is not it.
It's been doing this since before 20,000 kilometres, now at 80,000. Being so new it makes me doubt timing chain. But I did hear the chain slap on start a few times in the first year of ownership, and its never returned.
Will appreciate any help, I'm not the only truck around here behaving like this.
02-28-2019, 02:36 AM
#166
I started a new thread looking for help on my similar problem, but this thread seems to have lots of communality.
I know the plumbing and testing of my other "turbo" pretty well, (2001 911 twin turbo) but haven't delved into the ecoboost yet.
After reading some of the last posts in this thread, It actually seems like a fairly similar system.
The Porsche 911 Turbo:
On the 911, the wastegates are typically tuned:
Is there a known spec for "crack pressure" on the ecoboost wastegates? Is it recommended to increase crack pressure on a tuned engine?
PS, this is my issue I'm trying to solve... Intermittent, happens mostly when cold or on high mountain passes in higher gears.
I know the plumbing and testing of my other "turbo" pretty well, (2001 911 twin turbo) but haven't delved into the ecoboost yet.
After reading some of the last posts in this thread, It actually seems like a fairly similar system.
The Porsche 911 Turbo:
- Twin turbos with integrated mechanical wastegates.
- The wastegates are spring loaded, adjusted by a lock-nut actuator rod.
- Wastegates can be held to higher pressure by the engine control system either allowing or blocking pressure from entering the wastegate control line.
- Separate "diverter" valve system (equivalent to blow-off)
- Diverter valves are used to dump pressure when throttle is lifted (to prevent turbo stalling)
- Wastegates are used to control boost pressure when on throttle.
On the 911, the wastegates are typically tuned:
- Ensure they are not seized.
- "crack" open at ~6psi
- fully open at ~7.5 psi.
- Tuned engines that run higher boost are often increased a few pounds on crack pressure by adjustment rod.
- 1 turn of the locknut/adjuster = about 1.5 psi change in wastegate cracking pressure.
- Same on both wastegates
- Full boost (~16 psi) is achieved by NOT feeding the pressure to the wastegate.
- You always want to set your fully mechanical "default" wastegate opening pressure to be less than maximum boost and have the controller increase the boost as commanded.
Is there a known spec for "crack pressure" on the ecoboost wastegates? Is it recommended to increase crack pressure on a tuned engine?
PS, this is my issue I'm trying to solve... Intermittent, happens mostly when cold or on high mountain passes in higher gears.
Last edited by pfbz; 02-28-2019 at 02:48 AM.
11-11-2020, 11:27 AM
#167
Does it sound like this? Ecoboost wastegate problem at -2 degrees - YouTube Ecoboost wastegate problem at -2 degrees - YouTube
11-11-2020, 05:29 PM
#168
Senior Member
11-11-2020, 05:39 PM
#169
11-12-2020, 07:00 AM
#170
Member
I started a new thread looking for help on my similar problem, but this thread seems to have lots of communality.
I know the plumbing and testing of my other "turbo" pretty well, (2001 911 twin turbo) but haven't delved into the ecoboost yet.
After reading some of the last posts in this thread, It actually seems like a fairly similar system.
The Porsche 911 Turbo:
On the 911, the wastegates are typically tuned:
Is there a known spec for "crack pressure" on the ecoboost wastegates? Is it recommended to increase crack pressure on a tuned engine?
PS, this is my issue I'm trying to solve... Intermittent, happens mostly when cold or on high mountain passes in higher gears.
https://youtu.be/60O5SLFD_3o
I know the plumbing and testing of my other "turbo" pretty well, (2001 911 twin turbo) but haven't delved into the ecoboost yet.
After reading some of the last posts in this thread, It actually seems like a fairly similar system.
The Porsche 911 Turbo:
- Twin turbos with integrated mechanical wastegates.
- The wastegates are spring loaded, adjusted by a lock-nut actuator rod.
- Wastegates can be held to higher pressure by the engine control system either allowing or blocking pressure from entering the wastegate control line.
- Separate "diverter" valve system (equivalent to blow-off)
- Diverter valves are used to dump pressure when throttle is lifted (to prevent turbo stalling)
- Wastegates are used to control boost pressure when on throttle.
On the 911, the wastegates are typically tuned:
- Ensure they are not seized.
- "crack" open at ~6psi
- fully open at ~7.5 psi.
- Tuned engines that run higher boost are often increased a few pounds on crack pressure by adjustment rod.
- 1 turn of the locknut/adjuster = about 1.5 psi change in wastegate cracking pressure.
- Same on both wastegates
- Full boost (~16 psi) is achieved by NOT feeding the pressure to the wastegate.
- You always want to set your fully mechanical "default" wastegate opening pressure to be less than maximum boost and have the controller increase the boost as commanded.
Is there a known spec for "crack pressure" on the ecoboost wastegates? Is it recommended to increase crack pressure on a tuned engine?
PS, this is my issue I'm trying to solve... Intermittent, happens mostly when cold or on high mountain passes in higher gears.
https://youtu.be/60O5SLFD_3o