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Re: Boost see-sawing on a gtec 2 chip
#15322
30/12/2005 05:49
30/12/2005 05:49
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Anonymous
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Anonymous
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the ebv can be a little erretic, yes.....
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Re: Boost see-sawing on a gtec 2 chip
#15324
30/12/2005 20:13
30/12/2005 20:13
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Joined: Dec 2005
Posts: 2,033 I WANT F40
S1MMA
Competition Level
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Competition Level
Joined: Dec 2005
Posts: 2,033
I WANT F40
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as above its your EBV, I tried cleaning mine and it did nothing. Best cure is by whacking a PRV on there
Sideways a LOT
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Re: Boost see-sawing on a gtec 2 chip
#15325
30/12/2005 21:04
30/12/2005 21:04
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Anonymous
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Anonymous
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How do you set up the prv?
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Re: Boost see-sawing on a gtec 2 chip
#15326
30/12/2005 22:03
30/12/2005 22:03
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Anonymous
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Anonymous
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Re: Boost see-sawing on a gtec 2 chip
#15328
30/12/2005 22:56
30/12/2005 22:56
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Anonymous
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Anonymous
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If the EBV is the cause of teh fault a PRV will solve it, both are boost controllers. Regarding the on/off boost characteristic, you'll get used to it.
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Re: Boost see-sawing on a gtec 2 chip
#15330
31/12/2005 17:27
31/12/2005 17:27
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Anonymous
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Anonymous
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Almost all components are Bosch. Italian wires perhaps?
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Re: Boost see-sawing on a gtec 2 chip
#15332
01/01/2006 02:00
01/01/2006 02:00
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Anonymous
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Anonymous
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The PRV isnt totally on off... i find it kicks up to 10-12psi if u are tapping it then if ur full throttle then its the full whack u get! U do get used to it!
Ross
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Re: Boost see-sawing on a gtec 2 chip
#15333
07/01/2006 00:18
07/01/2006 00:18
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Anonymous
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Anonymous
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This happens on some cars (with either gtec1 or 2) due to the way the ECU controls the EBV being "lazy" and not responding quickly... it's because I'm trying to keep the overboost as low as possible (therefore quite close to the sustained boost level), if the boost overshoots it's target value then it can end up "see-sawing" between the sustained and overboost values.
One solution is to make a custom chip with slightly higher overboost level (have fixed a couple of "see-saw" boost problems like that), so the ECU/EBV can settle between them and not "see-saw" up/down, or to just fit a PRV or electronic boost controller to set the boost level manually.
Fitting a PRV is overall a better solution 'cause it helps keep overboost down and gives a lot more consistent boost.
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