Stalling under load/on hills

[theboy455]

My 96' explorer 4x4 xlt has a problem. I live on a hill and if I stop on the hill and quickly hit the gas it has a split second hesitation as if it wants to die. If I put one foot on the brake and one foot on the gas and goose it really quickly, it will die. After it dies I can turn it right back on again and it starts up normal and fine.

It has been to the shop and had the following checked/repaired

checked for vaccume leaks
- checked all electronic sensors and componenst
- replaced plenum gasket set
- replaced intake gasket
- new IAC sensor
new MAP sensor
- complete tune up with plugs

It still has a hissing sound in the intake but it cannot be located. It almost sounds like it has a cold air intake but does not.

Anybody else had this problem?

 

[dynamite196]

in the tune up did you include the air filter and fuel filter?

 

[marragtop]

Also, did you replace the wires?

 

[410Fortune]

Sounds like a classic weak fuel pump to me, did they not check fuel pressure?
how many miles