help engine missing realllly bad, possible computer or trans problem

[Tat2dExploder]

OK this is gonna be rough to explain...
I have a 95 sport, in which i swapped the auto tranny out for a mazda 5spd...
now for the problem, it seems like i lose like 2 cylinders, its a really bad miss i have to almost floor just to not lose any speed. from what i have noticed it only happens at higher rpms like 2500 and up, also usualy only happens in 3rd 4th and mostly 5th
heres what i know for a fact about the problem...
only happens when in gear
if i shut the engine off and turn in back on really quick it will run fine until the next time it does it.
or sometimes i can just keep my foot on the gas, and eventually the engine will kick back to normal...
is it possible that my computer is causing this? becasue i'm still using the original computer from when it was an automatic?
btw it never did this with the automatic

 

[Alec]

It's very possible you need a manual computer. If not it's most likely something sensor related.

 

[Tat2dExploder]

thnx alec, i will give the computer a shot....

can anyone else make sense of this?

 

[Tat2dExploder]

update... wasnt the computer... now i'm leaning towards tps? any input would be greatly appreciated

 

[Billy177]

since you have a manual i would have to reccomend against the tps. i would change your plugs or atleast check the gap. but i think that cleaning your maf and a new fuel filter would be your best bet.

 

[Tat2dExploder]

i did my plugs wires coil pack maf iac fuel filter, all 2 weeks ago....

why do you reccomend agaist the tps?

i appreciate your advice

 

[Billy177]

well if it only does it in third-fifth if it was the tps i would think that it would do it all of the time. are you using the manual computer or the auto computer right now. also try a tank of premium gas if it goes away from that then we know where to work if from