97 sl1 started stalling when 1/4 tank of gas now stalls at 3/4 tank replaced fuel pump and filter/regulator twice runs great when full
It seems that cap of the tank is not letting in air to replace the volume consumed by the engine. Earlier, when it used to stall when1/4 full, there must been less blockage of air but now the air inlet must be really clogged-up,so much so that after being emptied 1/4 of fuel, the negative pressure built up inside the tank is enough to negate the fuel pumps capacity & without gas it will stall the engine which is being deprived of fuel.
One way to make sure that this IS the problem, fill the tank half, do not put the cap try a drive at least for 5 miles & if the engine does not stall, then one can be sure that he cap of the gas tank has to be replaced............sodeep
Oct 19, 2009 |
1997 Saturn SL