AEM TruBoost doesn't hold low boost
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AEM TruBoost doesn't hold low boost *****Solved*****
Okay so as the title says I have been having this problem for some time now but haven't been driving the car so it really hasn't bothered me.
I have a AEM TruBoost, it is connected correctly, verified by 2 shops and the manual several times. The wastegate spring is 8 psi which makes about 7. The gate holds the turbo find and it does not spike or over boost.
When I turn the BC on the lowest setting (10) it does not hold the turbo below 11psi, it may be higher but I have the tune messed up at that level so it doesn't hurt anything. Could it be a bad solenoid? Or is there some odd way to set it up that I don't know. It will hold it at or above 11 psi if I stay in it, doesn't just spike there.
I would love to be able to set it to about 9-10 psi but can't seem to get it down there and would hate to buy a manual boost controller and just use this thing as a gauge.
Okay so as the title says I have been having this problem for some time now but haven't been driving the car so it really hasn't bothered me.
I have a AEM TruBoost, it is connected correctly, verified by 2 shops and the manual several times. The wastegate spring is 8 psi which makes about 7. The gate holds the turbo find and it does not spike or over boost.
When I turn the BC on the lowest setting (10) it does not hold the turbo below 11psi, it may be higher but I have the tune messed up at that level so it doesn't hurt anything. Could it be a bad solenoid? Or is there some odd way to set it up that I don't know. It will hold it at or above 11 psi if I stay in it, doesn't just spike there.
I would love to be able to set it to about 9-10 psi but can't seem to get it down there and would hate to buy a manual boost controller and just use this thing as a gauge.
Last edited by Super Slow SS; Sep 29, 2011 at 03:16 PM.
Pressure check your solenoid. Also double check for leaks at the fittings on the solenoid, boost source and at the wastegate. I have used several of these and never had this issue.
Do you have the boost source Y'ed off having one line go to the bottom port of the wastegate, then another going to the boost solenoid that adds pressure to the top port? If so a slight leak in the solenoid could easily cause your problem. Another thing to check is to make sure your vent is not clogged on the un-used port on the solenoid.
Do you have the boost source Y'ed off having one line go to the bottom port of the wastegate, then another going to the boost solenoid that adds pressure to the top port? If so a slight leak in the solenoid could easily cause your problem. Another thing to check is to make sure your vent is not clogged on the un-used port on the solenoid.
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Pressure check your solenoid. Also double check for leaks at the fittings on the solenoid, boost source and at the wastegate. I have used several of these and never had this issue.
Do you have the boost source Y'ed off having one line go to the bottom port of the wastegate, then another going to the boost solenoid that adds pressure to the top port? If so a slight leak in the solenoid could easily cause your problem. Another thing to check is to make sure your vent is not clogged on the un-used port on the solenoid.
Do you have the boost source Y'ed off having one line go to the bottom port of the wastegate, then another going to the boost solenoid that adds pressure to the top port? If so a slight leak in the solenoid could easily cause your problem. Another thing to check is to make sure your vent is not clogged on the un-used port on the solenoid.
Also entire setup is in the sig.
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just double checked my vacuum lines ,
Solenoid 1- goes to boost reference (intake)
Solenoid 3- Air reference (filter)
Solenoid 2 - goes to top of wasegate
Side of wastegate goes to boost reference (intake)
Solenoid 1- goes to boost reference (intake)
Solenoid 3- Air reference (filter)
Solenoid 2 - goes to top of wasegate
Side of wastegate goes to boost reference (intake)
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you will have to mess with the spr setting, you will have to run it lower than waste gate spring pressure.
That adjusts the boost level that the wastegate starts to crack open, and you need to run that low so it won't spike.
I've had to run it down to 4.7 on a 7lb spring in my last car to run just over wastegate pressure.
That adjusts the boost level that the wastegate starts to crack open, and you need to run that low so it won't spike.
I've had to run it down to 4.7 on a 7lb spring in my last car to run just over wastegate pressure.
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you will have to mess with the spr setting, you will have to run it lower than waste gate spring pressure.
That adjusts the boost level that the wastegate starts to crack open, and you need to run that low so it won't spike.
I've had to run it down to 4.7 on a 7lb spring in my last car to run just over wastegate pressure.
That adjusts the boost level that the wastegate starts to crack open, and you need to run that low so it won't spike.
I've had to run it down to 4.7 on a 7lb spring in my last car to run just over wastegate pressure.
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Right, but I am using the intake as a "true" boost reference point as the compressor will often read 1-3 psi lower than actual intake pressure due to loss across the I/C and other factors, I have always used the intake. Would this cause a problem with the controller?
Right, but I am using the intake as a "true" boost reference point as the compressor will often read 1-3 psi lower than actual intake pressure due to loss across the I/C and other factors, I have always used the intake. Would this cause a problem with the controller?
They are being used as a pressure source on the wastegate. There is more pressure at the compressor than there is at the intake unless you have the worlds most efficient intercooler.
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Thanks, to everyone in this thread who has helped.
does it feel like its surging...? your fighting the spring in the wastegate, take the spr pressure number lower.
if your bored watch the 4 videos on youtube AEM made to walk you through the way it works.
this is why I got the manual controller,,,,
if your bored watch the 4 videos on youtube AEM made to walk you through the way it works.
this is why I got the manual controller,,,,
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With the settings above it seemed to spool much slower than it did with the controller off.
