2 cents here please!
Thread Starter
Instructor
Joined: Nov 2008
Posts: 170
Likes: 0
From: Odessa Tx
Ok I have learned on this thread that the fuel pressure regulator is near the distributor under the plenum...now how do I get it down to that setting? Do I screw in or out on the screw? Can I mess with it and adjust it while the car is running?
Max G’s
Joined: Nov 2008
Posts: 2,751
Likes: 78
From: Monroe OH
NCM Sinkhole Donor
Ok I got a fuel pressure tester and here is what I have got:
when I just turn on the key without turning the enine over or on it goes up to 54psi and goes back down to 20 psi
when I start the car at idle I have 50psi and its pretty much around 50 psi as I rev the motor and may even loose a bit down to 48 at high rpms.....
So is this good or not? I have never messed with fuel injection before.
when I just turn on the key without turning the enine over or on it goes up to 54psi and goes back down to 20 psi
when I start the car at idle I have 50psi and its pretty much around 50 psi as I rev the motor and may even loose a bit down to 48 at high rpms.....
So is this good or not? I have never messed with fuel injection before.
Way to high. Take back to between 34 and 40psi. 
Thread Starter
Instructor
Joined: Nov 2008
Posts: 170
Likes: 0
From: Odessa Tx
Well I found out by trial and error that screwing the screw out lowers the pressure. Only one problem.... it will only go as low as 42-43psi and the screw is almost out of the regulator. Will a new regulator be needed or is something else wrong?
Racer
Joined: Jun 2001
Posts: 377
Likes: 10
From: Chicago IL
I had the same symptoms way back when- a long time ago when there was a warranty on the car - car would heistate, bog, almost stall, etc. Long story short, it turned out to be the computer / ecm. or so the dealer said it was (after keeping it for 4 days). I cant help with testing of the ecm, but if you had access to another computer to swap for a bit, it could be worth it. and when you talk about the burn off module, you mean the silver box hidden behind the "bread box" right? This is unique to the 85's.
Burning Brakes
Joined: Nov 2007
Posts: 1,213
Likes: 2
From: Cincinnati oh
Make sure to Check your Volume, It can put out enough pressure and not enough volume. also The FPR is just a Bladder if it has a tear in it it will not supress enough fuel and flood your motor It is not terriably expensive I would recomend replacing it.
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