Heres the situation, I had a idle problem when i first got my gsr 3 or so years ago and i fixed it. Starting about 2 weeks ago my car just started to idle really bad once again. So this time i assumed my brake master cyl was going out. So i ordered a new nisan one and replaced it. I still have the bad idle, i checked my throttle body and IACV . The idle is from 1.5k to 3.5k and isnt rapid, its slow paced.

Any ideas?

 

The brake MC isn't what causes a bad idle, its the brake booster that can. There are many potential causes of a low/bad idle, so search and start checking them one by one. Causes can range from FITV's, IACV's, clogged air or fuel filters, bad plug wires or oil seeping past the plug tube seals, coil, ignitor, dist. cap, rotor, etc.

 

Carb cleaner is your friend. Did you play with or replace anything right before it started happening? Intake manifold, throttle body, etc?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95 integra &raquo;</TD></TR><TR><TD CLASS="quote">Carb cleaner is your friend. Did you play with or replace anything right before it started happening? Intake manifold, throttle body, etc?</TD></TR></TABLE>
nope, it just started to idle bad after i got off work, car was fine the morning of. i would idle at 900, now its jumping from 1.5k~3.5k and its very annoying to drive with a stiff clutch and solid motor mounts.

i already checked the IACV, TB, and manifold. im gonna try and switch out manifolds and clean the IATV. this idle isnt fast paced like the last time i had this problem. it revs up and down very very slowly which i find odd. if the brake booster was going out, what would the symptoms be? my car brakes fine but i notice the brake pedal moves up and down when i have it depressed,