djrazr

iTrader: (2)

Just recently on cold start ups, i've been getting a rough rumbling idle. Rpms start at 1800-1900 rpms, and i get the rumbling idle, then it smooths out, then starts rumbling again. She does it' until the engine is warm, and then it goes away completely, then it starts back up when cold

suggestions?
thanks

sicwhip

Did anyone ever solve this ... I have recently had the exact same issue ... suspect bad gas or bad plugs ... not sure how to diagnose either one ...

BigBang

iTrader: (1)

My celica does that too. Could be the motor mounts? D:

xxtoobsxx

iTrader: (4)

My guess is your fuel air ratio is bad.Try new oem O2 sensors, not universals either (i made that mistake). Basically what happens is you get a bunch of carbon built up on your pistons. Your injectors squirt fuel ((obviously) and the carbon absorbs the fuel until it warms up and the carbon gets burned off. Make sense? Now if you have a hesitation while driving it after its warm it could be a slew of problems.

Fuel injector treatment, O2 sensors and some seafoam (then new plugs). should fix it...