thafox

ok,i looked on the -se idle problem site and found something similar but not exactly like my problem, i was just driving home from work 2day and as i came to a stop it felt like the whole car was shaking and it was idling round 700-800 i tap the throttle a bit to take it up 100rpm and it's smooth, still have all the power and everything, it's just a very rough idle and idk where to look first, tune up was done not to long ago, has about 200520miles (i know i know everyones' gonna say time 4 a rebuild, but that's not exactly what i'd like to hear right about now lol lacking in the funds dept right about now and this is my daily) i dont really do much other than drive it normaly everyday shift round 3k and this happened when i was just driving listening to the radio like normal, no ac on or anything else just the radio

Rx-7Doctor

iTrader: (13)

Has the sound of the engine changed at all?
Any loss of power?

thafox

no loss of power...yes diff sound of the engine just when it's idling rough but when i tap the throttle a bit it sounds normal

Rx-7Doctor

iTrader: (13)

Perform a compression test.

Could be vacuum leak, check all hoses and the air intake hose connections especially where the 2 pieces of the hose join together.

Kentetsu

Yeah, time for a compression check. Driving casually all the time like that, you might have built up enough carbon to cause an apex seal to stick. A can of Seafoam through a partial (1/8 - 1/4) tank of gas could correct that, if that is the issue...

85 FB

What about steaming the engine with a spray bottle full of water through the vacuum hose of the brake booster? Would that also work?

bliffle

I've found that all my rotarys run smoother once I start adding 6-8oz. of MMO to every fillup of gas. Better than the radical de-carb treatments.

thafox

Ok wtf....its not doin it anymore since this morning....I started it up 1st time this morning and it was back 2 normal ever since....and I've been driving pretty much all day

85 FB

Any change in weather in your area? My car is a bit finicky when it gets really cold sometimes.

j9fd3s

iTrader: (3)

sticking bac valve maybe, or a vacuum leak. the big air duct hoses, since one end is on the car and the others on the motor, can leak intermittantly