CantStopDriftin

ok so i have about had it trying to find this problem. my car seems to accelerate fine, but when i hold it at a steady rpm while driving, it seems to drop in rpms and then pick back up to where it was. i removed my cats and cleaned some crap out of there, i checked my plugs and wires, and my maf seems to be working ok. if anyone has any ideas please help asap or im gonna part this thing out. thanks, wes

rototiller1

That is a lean surge, go up 1 or 2 primary jet sizes

CantStopDriftin

btw this is my 86 n/a im having problems with.

rototiller1

Then change fuel filter, and check pump output

CantStopDriftin

any other ideas??

neptuneRX

how's your fuel pump? getting enough power?

rototiller1

A Bad throttle position sensor

mazdaverx713b

iTrader: (91)

ys, check the TPS. i am about 90% sure that is your cause right there. it can be adjusted easialy. the tps's do however wear out and go bad so you may just need a new one.

CantStopDriftin

how would i test or adjust it. i lost my haynes manual and the auto stores are closed. please help asap.