FPR Experiment
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
FPR Experiment
Well, I put a quarter under the cap of my fuel pressure regulator and now the pressure stays at 40 PSI instead of the 34 PSI. It seems to run better. I will probally get an adjustable FPR in the near future but this was a quick fix.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Instead of spending $50-$70 for an AFPR why not:
-remove the stock FPR
-flatten the dimple in the stock cap
-drill a hole in the center of the cap
-weld a nut on top of the cap over the drilled hole
-insert a hex screw into the nut and into the drilled hole
-put the quarter inside the cap and install
-use the screw to adjust the positoin of the quarter within the cap, thus giving you an AFPR for <$5.00.
-remove the stock FPR
-flatten the dimple in the stock cap
-drill a hole in the center of the cap
-weld a nut on top of the cap over the drilled hole
-insert a hex screw into the nut and into the drilled hole
-put the quarter inside the cap and install
-use the screw to adjust the positoin of the quarter within the cap, thus giving you an AFPR for <$5.00.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Since I don't have a welder I've not tried this method but pass along one that I've read works very well and helps hold the mods budget.
I really see no danger nor reason to not use this mod if one has the facilities to do it well.
I really see no danger nor reason to not use this mod if one has the facilities to do it well.
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
After the fuel injector replacement the car just didn't seem to run quite right. Had a slight miss and I tried multiple tips to resolve it, but to no avail. The recent intake gasket replacement left me thinking about this tip before I reassembled everything. Now that it is done the slight miss is gone and it reacts better, IMO.
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
When my fuel pump went out the mechanic plugged the vacuum line to the FPR. After I replaced the pump it ran like crap until I hooked the line back up. I honestly dont believe that slightly increasing the fuel pressure will improve performance unless you've got bigger injectors or some type of upgrade that will benefit.
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Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
Your right, its just a temporary fix. I'm planning on a adjustable FPR in the near future. It was a constant 34 psi before this.