cruising throttle

[RYanR31]

came across a small missfire a few weeks ago and its gradually got worse and worse, its only when im cruising under cruising throttle, when i say cruiseing throttle i mean when im resting my foot on the accelerator to maintain 60 etc. It starts to missfire quite a bit until i accelerate the slightest bit and it disapears. It runs fine when under full load. Is this my THrottle position sensor? its missfireing that bad that it jerks around the car back and forth when cruising down the road. very frustrating, also is the rb20/25 tps the same?

[RYanR31]

also, the car is very drowny and sometimes feels as tho i need to give more acceleration to keep momentum up...sound like its running rich as hell

[JasonO]

O2 sensor could be on the way out, as it only really comes into play when idling or cruising.

Does it do the same if you cruise at say 50mph or 80mph ?

[rb25]

Electrical problem by the sound of it. Check the CAS and TPS and any other obvious stuff like dodgy wires, earth on fuel pump too maybe.

[RYanR31]

i bought another tps today, it still does it so im gonna have a look at O2 sensor and see if thats it, what are they worth?

also, i cant get mine out....its too close to everything else to get a spanner on it.

[NismoGirl]

My car is doing the exact same thing at the moment. I've got it booked into the mechanics on Friday to try and fix the problem.

As he said, it has it's little tantrum only while cruising.. whether it's on 60/80/100kph. But if you are WOT, it seems fine?