indianaoutback Posted January 30, 2006 Share Posted January 30, 2006 Anyone know what symptoms my Outback might experience if the fuel pressure regulator is bad? My car stalls occasionally, usually after initial warm up or after a long highway run. Have replaced plug wires, temp coolant sensor, coil pack, etc. Quote Link to comment Share on other sites More sharing options...
Setright Posted January 30, 2006 Share Posted January 30, 2006 If the regulator goes bad, and can't hold the pressure up, you tend to get rough running at high revs. Perhaps the MAF is wonky? Quote Link to comment Share on other sites More sharing options...
friendly_jacek Posted January 30, 2006 Share Posted January 30, 2006 Hard to say, but you can always measure the fuel presure as part of your troubleshooting. The above comment is correct, MAF gets easly dirty in MAF-equipped engines. Some Subs are MAP-equiped though. Did you look into dirty fuel filter, dirty throttle, dirty injectors? Quote Link to comment Share on other sites More sharing options...
2X2KOB Posted January 30, 2006 Share Posted January 30, 2006 Checking for stored codes in the OBDII system might be informative. Quote Link to comment Share on other sites More sharing options...
tunered Posted January 30, 2006 Share Posted January 30, 2006 the fuel pressure regulator keeps fuel pressure from being to high,if the injectors are weak and the regulator is bad i guess the extra pressure could possibly flood the engine,other car brands that i have worked on with the vaccum hose off only raised the pressure 3-5 lbs so i really dought that this is the problem. Quote Link to comment Share on other sites More sharing options...
indianaoutback Posted January 30, 2006 Author Share Posted January 30, 2006 Thanks everyone, but.........we've cleaned the injectors, fuel filter, air filter, new plugs and wires, just replaced the starter, neutral safety switch and coolant temp sensor. The dealership replaced the air control valve and ignition coil pack........all that in four months and the car still does the same thing. The throttle body has also been cleaned. The symtoms started right before we replaced the second stage catalytic convertor. You warm the car up, drive for awhile, come to a stop, the tach drops below 0 and the car dies. Turn the key and it fires right up. Won't do it again until after a long high speed run. Any ideas would be appreciated. By the way, the code reads P1507............ Quote Link to comment Share on other sites More sharing options...
Legacy777 Posted January 31, 2006 Share Posted January 31, 2006 Get a gauge and check the fuel pressure at idle with and without the vacuum line attached. Quote Link to comment Share on other sites More sharing options...
indianaoutback Posted January 31, 2006 Author Share Posted January 31, 2006 Don't mean to sound ignorant, but what should that show us? Get a gauge and check the fuel pressure at idle with and without the vacuum line attached. Quote Link to comment Share on other sites More sharing options...
cookie Posted January 31, 2006 Share Posted January 31, 2006 If he means vac to the regulator it would tell you if it works. Quote Link to comment Share on other sites More sharing options...
sea#3 Posted January 31, 2006 Share Posted January 31, 2006 Thanks everyone, but.........we've cleaned the injectors, fuel filter, air filter,new plugs and wires, just replaced the starter, neutral safety switch and coolant temp sensor. The dealership replaced the air control valve and ignition coil pack........all that in four months and the car still does the same thing. The throttle body has also been cleaned. The symtoms started right before we replaced the second stage catalytic convertor. You warm the car up, drive for awhile, come to a stop, the tach drops below 0 and the car dies. Turn the key and it fires right up. Won't do it again until after a long high speed run. Any ideas would be appreciated. By the way, the code reads P1507............ P1507 is an idle control system malfuntion (fail safe ) Might want to check out the IAC SEA#3 Quote Link to comment Share on other sites More sharing options...
Legacy777 Posted February 1, 2006 Share Posted February 1, 2006 If he means vac to the regulator it would tell you if it works. Bingo Quote Link to comment Share on other sites More sharing options...
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