Adjustable FPR?

abhattan · 09-03-2007, 07:44 PM

Hey guys, here again with a question. I was changing out my injectors, because one of them was stuck open or something. While doing this, the plastic cap off of the FPR fell off and I saw a screw on top. Is the stock FPR adjustable or is it possible this is an aftermarket that looks like a direct replacement? All it says on it is "DENSO", which I know could be a stock component for Toyotas. Also, does anyone know what the stock computer's max is on injector duty cycle?

redmaro · 09-03-2007, 11:55 PM

Thats not your fuel pressure regulator thats your Fuel pulsation dampner.

Read Link:

http://www.supracentral.com/index.ph...d=51&Itemid=61

cre · 09-06-2007, 06:01 AM

Another tip: DO NOT attempt to adjust that screw! Unless you've got some VERY specialized equipment, you'll never get it back where it needs to be.

abhattan · 09-06-2007, 11:46 PM

It's a good thing you said that, I was just about to play with it tomorrow.

cre · 09-07-2007, 02:53 AM

Heh, yeah, I figured I ought to mention that. Mine was already out and I couldn't get it do help anything. So, I did some searching online and found a large PDF from some trade mag on that little bugger. They also said (to their subscribed mechanics) to not even bother touching it.

09-03-2007, 07:44 PM	#1
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	Adjustable FPR? Hey guys, here again with a question. I was changing out my injectors, because one of them was stuck open or something. While doing this, the plastic cap off of the FPR fell off and I saw a screw on top. Is the stock FPR adjustable or is it possible this is an aftermarket that looks like a direct replacement? All it says on it is "DENSO", which I know could be a stock component for Toyotas. Also, does anyone know what the stock computer's max is on injector duty cycle? __________________ '91 Turbo Targa 5 Spd. '87 Corolla GT-S 5 Spd '91 Accord Daily Driver 5 Spd Soon to be rebuilt (All to some extent)

09-03-2007, 11:55 PM	#2
redmaro walbro fp Join Date: Mar 2006 Location: arizona Posts: 432	Thats not your fuel pressure regulator thats your Fuel pulsation dampner. Read Link: http://www.supracentral.com/index.ph...d=51&Itemid=61 __________________ MK3, Auto, Turbo.

09-06-2007, 11:46 PM	#4
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	It's a good thing you said that, I was just about to play with it tomorrow. __________________ '91 Turbo Targa 5 Spd. '87 Corolla GT-S 5 Spd '91 Accord Daily Driver 5 Spd Soon to be rebuilt (All to some extent)

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09-06-2007, 06:01 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Another tip: DO NOT attempt to adjust that screw! Unless you've got some VERY specialized equipment, you'll never get it back where it needs to be.

09-07-2007, 02:53 AM	#5
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Heh, yeah, I figured I ought to mention that. Mine was already out and I couldn't get it do help anything. So, I did some searching online and found a large PDF from some trade mag on that little bugger. They also said (to their subscribed mechanics) to not even bother touching it.