Fuel pressure regulator.

[DarthBuick]

I noticed my car started running lean at WOT. I moved my FP gauge to windshield and it never got over 46 PSI. So I started to test the FPR and pressure barely changed when I removed the vacuum line. So while it was idling I tried to blow 8 PSI of regulated air into the Vacuum port to see if pressure would rise and I saw a small amount of fuel come out of the Vacuum port. I am guessing this is the reason pressure wont rise under boost.
It is a standard blue Kenne Bell regulator and I was wondering if someone has a part number for a new diaphragm or repair kit. Thanks

 

[Boost231]

Glad to see someone knows how to trouble shoot.

Sent from my SM-N910T using Tapatalk

 

[1KWIKSIX]

That Kenne Bell fuel pressure regulator is no longer available, although it looks very similar to a unit that Dennis Kirban offers.
Here's a couple of links to a new unit (so you can see how they both resemble each other ) and also for a replacement diaphragm, not sure if it will work.
Might be a good idea just to replace yours with a new tried and true unit from Kirban Performance,

http://www.kirbanperformance.com/pr...ADJUSTABLE+FUEL+PRESSURE+REGULATOR+#6547.html


http://www.kirbanperformance.com/pr...ADJUSTABLE FUEL+PRESSURE REGULATOR+#7602.html

Good Luck

dave

 

[DarthBuick]

Another question My O2 My was very low at 589 mV but it showed 0 knock. Shouldn't it have had some knock going that lean. Boost was 15 PSI.

 

[1KWIKSIX]

I'd strongly suggest pulling that O2 sensor and replacing it with a Denso 02 sensor.
These are considered the best sensor for these cars and most tolerant for longer life.
Cheap at only $14.95 from Highway Stars

Here's a link:
http://www.highwaystars.net/sensor-oxygen-o2-denso/

 

[DarthBuick]

I found my problem. This will explain why I was running rich at cruise speeds also.
I just placed a order at Kirbans so hopefully I will be back on the streets next week.