What does a fuel pressure regulator do?
06-30-2002 | 05:49 AM
#1
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Hey all I think I need a little help. What does an adjustable fuel pressure regulator do? Can it lower fuel pressure? Ever since I put this big Walbro in my car it has been running overly rich. The S-AFC doesn't seem to compensate enough for it. So before I throw more money at an adjustable FPR I need to know that it's going to do what I want it to do, which is, lower my fuel pressure. I'm looking at the Aeromotive A 1000 6 FPR right now which is supposed to be adjustable between 30-70 psi or something like that.
Thanks,
Michael
Thanks,
Michael
06-30-2002 | 01:53 PM
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From: Portland, OR
The only thing the vacuum line does to the factory regulator is raise the fuel pressure when decelerating for emissions.
But if you disable that I'm not sure what the factory ECU would do, might experience lean decelerating = backfiring.
But if you disable that I'm not sure what the factory ECU would do, might experience lean decelerating = backfiring.
06-30-2002 | 02:26 PM
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Originally Posted by dac' date='Jun 30 2002, 08:53 PM
The only thing the vacuum line does to the factory regulator is raise the fuel pressure when decelerating for emissions.
But if you disable that I'm not sure what the factory ECU would do, might experience lean decelerating = backfiring.
But if you disable that I'm not sure what the factory ECU would do, might experience lean decelerating = backfiring.
If I'm missing something let me know.
06-30-2002 | 02:28 PM
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Originally Posted by 13BAce' date='Jun 30 2002, 04:07 PM
Yes, you can lower the fuel pressure with it, provided that you're not using the stock regulator as well. If you place the aftermarket FPR after the stock one then you can only raise the pressure.
06-30-2002 | 10:50 PM
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From: Bay Area, CA
Originally Posted by OKIERX-7' date='Jun 30 2002, 01:41 PM
Can I disable the stock fpr by removing and capping the vacuum line nipples or do I need to remove the fpr completely from the fuel rail?
Why do you say that vosko? How hard could it be?
Why do you say that vosko? How hard could it be?
06-30-2002 | 10:51 PM
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From: Bay Area, CA
Originally Posted by OKIERX-7' date='Jun 30 2002, 04:28 PM
[quote name='13BAce' date='Jun 30 2002, 04:07 PM']Yes, you can lower the fuel pressure with it, provided that you're not using the stock regulator as well. If you place the aftermarket FPR after the stock one then you can only raise the pressure.
NO, you MUST install it after the secondary rail. Installing it before the fuel rails will cause many problems.
07-01-2002 | 11:19 AM
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Originally Posted by 13BAce' date='Jul 1 2002, 05:51 AM
[quote name='OKIERX-7' date='Jun 30 2002, 04:28 PM'][quote name='13BAce' date='Jun 30 2002, 04:07 PM']Yes, you can lower the fuel pressure with it, provided that you're not using the stock regulator as well. If you place the aftermarket FPR after the stock one then you can only raise the pressure.
NO, you MUST install it after the secondary rail. Installing it before the fuel rails will cause many problems.
Heh, good thing I don't give automotive advice for a living....Thanks for the link Ace. Now I see why putting that FPR in is somewhat of a major undertaking. I'll probably go back to a smaller pump for now.