drifter_xs

hi so im really frustrated now and i dont know what to do ... what can cause misfiring on throttle... all gears steady acceleration ... and it feel like its misfiring.

specs:
-87 NA 6 port
-132,xxx
-new plugs
-new wires
-new oil

Black Knight RX7 FC3S

iTrader: (7)

adjust the tps sensor

J5sense

iTrader: (3)

only light accl? med and hard accl ok?

drifter_xs

do you think you can walk me through that plz

drifter_xs

well actually its both i think . i havent really been gunning it cuz im scared a lil lolz but light and med for sure

do you know what else can cause this other than the tps?

Kawizx9r

iTrader: (2)

I vote for TPS. Get yourself a multimeter and get ready to calibrate it. This one proved useful - http://www.fd3s.net/tps_adjustment.html

PS If/when you remove the AWS line from the throttle body, get ready to catch your spill of coolant! I'd have a towel/rag underneath and ready. Found out the hard way (maybe I didn't catch that in the link I posted)

Edit: Ignore the above, I thought I was posting under 3rd Gen.

Black Knight RX7 FC3S

iTrader: (7)

on a S4 look at the back of the ecu, on pin 2g which is a green with red stripe wire, use a multimeter to probe that wire for 1 volt.
The wire has to have approximately 1volt at idle, at 800rpm or close to it, with engine warmed up already. If its not close to 1 volt adjust the tps in the engine bay by screwing the adjustment screw on the sensor.
Other people check for the resistance, but checking for volt is what the ecu reads it in.

The tps will also have breaks in contact within the sensor (it is a 20+ year old car) So you can do a sensor range sweep to check for any internal contact problem in the tps sensor.