low rpm stumbling

[mopwrd340]

i just purchased a 93 cherokee yesterday and after running it today it stumbles when you put your foot on the gas to take off . didnt do it yesterday when i got it if you gradually tip into the throttle stopped or rolling it won't do it . I'm thinking tps am i headed in the right direction. it is a 4.0 aw4 thanks :wavey:

[JeepcoMJ]

how's the pressure at the schraeder valve on the fuel rail?

[mopwrd340]

havent checked yet it will run great when floored . just seems to stumble below 2000 rpm what should the pressure be at when running.

[JeepcoMJ]

look for a vacuum leak.

[mopwrd340]

thats possible i traded my van for yesterday to a used car dealer and when i got there they were working on it .they ha put a new vc gasket on (cork) by the way . it looked like it had been leaking pretty bad theh cobbled up some hoses for the pvc system . if i look more I'm sure i will find a broken vacum line thanks. :idea: