I have a 93z its runs ok cold but after 1/4 of a mile the car sputtering if you stop you will get a rpm jump from 500 to 1200 rpms untill I dvive it two or three miles than it runs fine I have ran a scan and found no codes ?

Thanks
Rick

 

Clean your IAC and TB.

How many miles on your O2 sensors?

 

maybe 20.000 the car has right at 60.000 on it

 

clean your map sensor as well

it helps

 

Does your oil pressure also jump around?

 

Just with the rpm drop or jump