94 4.0 dies with any amount of throttle

[stsalvage]

Or it could be this bad boy most of the time it's not

 

[stsalvage]

that's the aftermarket one this is the factory one

 

[stsalvage]

2.9 and the 3.0 and the 4.0 use the same Cat

 

[cougar190]

Look at the tube that goes from your air filter box to your the plenum. I had a 92 Ranger that would start and run idle as a top but if you got off idle it would dye. If you slammed the throttle from idle it would jump and run until it got close to max RPM then start lurching/stalling. Like a huge vacuum leak, turns out the tube was cracked in the areas where it has the flexible joints. Hope this helps! ...cougar...