Is 49-52 psi to much fuel pressure on the fuel rail when at idle? this is for a 96 grand cherokee laredo. 4.0L. I trying to figure out why my moms ride keeps stalling or wanting to die when coming at a stop. when its at idle it sometimes rough idles and then goes back and forth. just want to make sure that too much fuel pressure is not causing this. my dad has replaced coil, spark plug/wires, tranny fluid/filter, fuel filter and pump. crank position sensor. is too much fuel pressure bad? i read it should be around 37-41 psi. thank you!