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Old 07-24-2013, 08:36 PM   #1
bluba
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HPF stage 2 meth problem

New pump, new Solenoid and sensor is about a year old. On just the pump/meth setting, the car starts to Flutter and loses power on midrange and above. The boost gauge stays at 13 so I don't have a leak or the sensor going bad. The car doesn't seem like it's missing! On pump mode and race mode only( no meth) car runs fine. On race/meth mode, I think Everything is working fine but hard to tell.... I might feel some fluttering on the very top RPM range! Also if the car is cold like it sat overnight, I can get 3 to 5 pulls with the meth before car starts acting up... Once the car is completely warmed up I seem to have the problem with the pump/meth setting, Any ideas
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Old 07-24-2013, 08:56 PM   #2
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Sounds like you have a meth leak somewhere...
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Old 07-25-2013, 09:26 AM   #3
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Wouldn't the boost drop back if I had a leak? I also pressurized the lines and I didn't see any visible leaks
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Old 07-26-2013, 08:27 AM   #4
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Re: HPF stage 2 meth problem

You left out the most important info.....afr.

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Old 07-27-2013, 08:20 AM   #5
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You left out the most important info.....afr.

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I will check once I have chance.
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Old 07-27-2013, 11:10 AM   #6
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HPF stage 2 meth problem

Quote:
Originally Posted by bluba View Post
New pump, new Solenoid and sensor is about a year old. On just the pump/meth setting, the car starts to Flutter and loses power on midrange and above. The boost gauge stays at 13 so I don't have a leak or the sensor going bad. The car doesn't seem like it's missing! On pump mode and race mode only( no meth) car runs fine. On race/meth mode, I think Everything is working fine but hard to tell.... I might feel some fluttering on the very top RPM range! Also if the car is cold like it sat overnight, I can get 3 to 5 pulls with the meth before car starts acting up... Once the car is completely warmed up I seem to have the problem with the pump/meth setting, Any ideas
Sounds like knock and the Aem is pulling timing to compensate... Do u have ur Aem unlocked ? Best way to know is pull the logs... If u need it unlocked ask John Reed for help. johnreedracing@gmail.com ... U dont want to mess with this if meth is not working properly u could do some damage


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Old 07-27-2013, 01:39 PM   #7
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Wouldn't the boost drop back if I had a leak? I also pressurized the lines and I didn't see any visible leaks
The meth system has a pressure sensor, so it will drop the boost if the pressure is too low. You would see a leak big enough to drop the pressure, so perhaps the sensor is failing? Also, if you ran out of meth at some point, you need to disconnect the hose and purge any air out of the system. You probably already know that, but just suggesting things to double check.

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Sounds like knock and the Aem is pulling timing to compensate... Do u have ur Aem unlocked ? Best way to know is pull the logs... If u need it unlocked ask John Reed for help. johnreedracing@gmail.com ... U dont want to mess with this if meth is not working properly u could do some damage
The knock alarm is pretty sensitive, and I think it will start chirping before timing would be pulled.

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Old 07-27-2013, 01:44 PM   #8
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HPF stage 2 meth problem

FYI : from my experience the Aem picks up knock before the siren goes off and pulls timing. So u can have knock without the siren going off. I've done many logs showing the knock retard with no siren going off.and the Aem not even recording them... I adjusted the tune via knock retard as a guide & not knock volts as they happen to fast for the logs to pick up even at 250 samples a second. I now have my AEM serial gauge programmed to monitor knock retard and gives me a visible warning... Way more accurate than the siren and I don't have to worry about hearing it. I bet there r cars out there getting knock and not even knowing it.... It shows up on the Dyno graphs really well u can see the drop where knock occurs and I confirm it with the log.. This way of tuning was how I got such high torque numbers.


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Old 07-29-2013, 05:21 PM   #9
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Ok the problem Definitely arises after the car has been warmed up with a 10 pulls. On pump/ meth, the air/file will go from 11 to 12.5 than I back out of it. Boost never backs down. On race/meth I feel it so slightly but really no A/R change.... Maybe .5
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Old 07-29-2013, 05:26 PM   #10
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Do what I did...cut out your whole meth system. Problem solved and no more risk of intake manifold/intercooler blowing up or catastrophic engine failure...and no explosive tank in the engine bay.

If you want race/meth power on pump fuel...run E85 which I'm sure PA has alot of...and throw in a flex fuel infinity
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Old 07-29-2013, 05:46 PM   #11
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Do what I did...cut out your whole meth system. Problem solved and no more risk of intake manifold/intercooler blowing up or catastrophic engine failure...and no explosive tank in the engine bay.

If you want race/meth power on pump fuel...run E85 which I'm sure PA has alot of...and throw in a flex fuel infinity
What? Can you hook me up with this
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Old 07-29-2013, 06:29 PM   #12
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What? Can you hook me up with this
Click the link in my signature
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Old 07-30-2013, 12:50 PM   #13
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Click the link in my signature
Thanks
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Old 07-30-2013, 12:57 PM   #14
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Ok few more pulls today. Only have the problem when I mash the gas pedal to wide open throttle too.... If I ease into it to wide open throttle, car works fine. Like I said the only thing that has not been replaced new is pressure sensor and spray nozzle
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Old 08-01-2013, 07:34 PM   #15
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Re: HPF stage 2 meth problem

Have you looked at nozzle? The tip moves over time. Something to chm.

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Old 08-01-2013, 08:41 PM   #16
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Have you looked at nozzle? The tip moves over time. Something to chm.

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What u mean moves? I looked at it but just looked u shaped! Maybe clog with something?
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