Blackstahill Posted June 27, 2007 Report Share Posted June 27, 2007 Got a fuel/heat problem Car run just fine until i shut it down when its warm,or have it out in the sun a warm day Then it stall after 10-30 sec. sometime little longer Some times it start right up but often i have to crank it 10-20 times before it starts then it runs perfect Never any problems in cold mornings ect. only when its hot out side No codes except H PO95 I have a fuelpressure tester connected and it show 40 psi,but when the cars stall it drops to 0 I also been abel to see through PCM Data the Fuel Pump Feedback Voltage drops from steady 13,7V to approximately 11V when it stall Need some help what to do! Link to comment Share on other sites More sharing options...
Cadillac Jim Posted June 27, 2007 Report Share Posted June 27, 2007 It sounds like it might be the fuel pressure regulator (FPR). Since it's not electrical it can cause hard starting and stalling when hot without throwing a code. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
Ranger Posted June 27, 2007 Report Share Posted June 27, 2007 Sounds logical that the fuel pressure will drop to 0 when the engine stalls. I'm with Jim. My money is on a leaky FPR. Link to comment Share on other sites More sharing options...
Spurlee Posted June 27, 2007 Report Share Posted June 27, 2007 FPR! www.rockauto.com to the rescue. $40.00 Scott 1996 El Dorado 2006 STS 2000 Corvette Link to comment Share on other sites More sharing options...
Blackstahill Posted June 27, 2007 Author Report Share Posted June 27, 2007 I've been looking at the FPR and no visible leak But when i listen at the fuel pump through the gas door i hear it stop right before it stall The question is: Bad fuel pump? Or some device thats control the fuel pump voltage don't stand the heat in engine room? I drive 800 miles two times a week,and the car runs perfect as long i don't stop and shut it down fore a while Link to comment Share on other sites More sharing options...
Ranger Posted June 28, 2007 Report Share Posted June 28, 2007 Ok, what comes first, the stall or the pressure drop? Maybe it IS an intermittent pump. Link to comment Share on other sites More sharing options...
Blackstahill Posted June 28, 2007 Author Report Share Posted June 28, 2007 Ok, what comes first, the stall or the pressure drop? Maybe it IS an intermittent pump. The pressure drop comes first Link to comment Share on other sites More sharing options...
Ranger Posted June 28, 2007 Report Share Posted June 28, 2007 Then I would suspect a failing pump. Check the connections first. Perhaps they are loose. dirty or corroded if you are lucky. Link to comment Share on other sites More sharing options...
Blackstahill Posted June 28, 2007 Author Report Share Posted June 28, 2007 Ok i have not check the connection yet but i will I look into the FPR once more,no leak and it holds vakum fine but the fuel pressure drops 20 psi in one hour,is it possible the pressure leak back in to the tank? Link to comment Share on other sites More sharing options...
Ranger Posted June 28, 2007 Report Share Posted June 28, 2007 the fuel pressure drops 20 psi in one hour While driving or after shutdown? Link to comment Share on other sites More sharing options...
stsjoe Posted June 28, 2007 Report Share Posted June 28, 2007 Replace the FPR, its the easiest and cheapest, if that doesn't fix it then start looking at the pump. Joe Link to comment Share on other sites More sharing options...
Blackstahill Posted August 24, 2007 Author Report Share Posted August 24, 2007 I´v change the fuelpump and no more stalling!! //Erik... Link to comment Share on other sites More sharing options...
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