40psi WHEN? At idle? Ignition off, motor on? What was it at idle with the vacuum line disconnected?

it was at 40 psi at idle and all i did was hook up the meter i didnt touch anything else no vacum lines or ne thing...and then when i just turned the key in the on position without starting it it was round 45 psi.....

Hey Everyone...

Let'* put the fuel pressure gauge down. Recently we have a couple of members that fought this code in every manner possible.

Dyno...did you pull the booties off the battery connection wires? Also..you need to get under the car, remove the plastic shield and clean connections for the ground at the block. It looks tough but goes pretty well. Then pull the cover off the maxifuse relay center...and clean the connections where the positive lead is bolted to supply power.

The light and PCM seem to drive you nuts because it takes two consecutive drive cycles with a failure to come on and 3 good consecutive cycles to go off.

Here'* my advice, and take this from someone that went crazy like you are. Stop testing fuel pressure. If you want that light gone, hop over to the thread Lash linked, read it..you will see that 3-4 cars with this issue were cleared up with some form of battery cable cleaning or replacement of cable or battery. (battery was only replaced by San Juan Cruiser due to crack by terminal). I replaced cables because at that point..I was no longer playing around.

FP on a S2 SC is 48-57psi per the correct testing procedure of key on, bleed air, key off, back on ..off back on to attain max pressure....leave like that for 10 min to look for any leak down.

ok well i cleaned every terminal i could find but the ground wires so i guess that will hopefully b my last stop...ill take your advice and go to it....

Also..PULL the boots off the terminals and look at the cables. My terminals looked great. all nice and clean. Still had the problem. I can't stress enough how this issue is slight variations in electrical current. Also check to ensure the #6 plug wire is not touching the O2 sensor wires. 1/2" away is ok..

The manual aims you straight for electrical variation items. I lived with that %#&^#%*&%#$^$#%^ light for almost 2 months. $100 in battery cables and I haven't seen it in almost 2 weeks.