So I've been driving my LS for a while and I just started to notice that it has been vibrating more than it should and also my RPM is between 0-0.5 so its around 0-500 RPMS when I'm idle, even when its cold or warm. Does anyone know what's wrong?

My other question was that my ABS lightthing has been turning on and off randomly and everytime I start my car, it makes a whirring noise. Is that normal? or is it the ABS thing about to break?

Btw I'm francis and I'm new at these car stuff, and also I'm new at this forum place. xD

 

You might have a bad ABS sensor, are any of your calipers dragging at all? I had a stuck caliper that ruined an ABS sensor. Also your idle seems really low, you might want to adjust it.

 

sorry if im being hela noob but what are the calipers?

 

This is easier to explain with a picture, the part on the right is the brake caliper.

 

That RPM at idle is too low. Your engine will not run at a much lower RPM than 500. I would try clocking your TPS along with checking to see if your Throttle Cable is binding or too tight. If you do get someone to help you the TPS should be clocked to .5V at idle and 4.5V at WOT.

 

as of the idle, you can have a bad idle sensor or your ecu could be acting up. try resetting the ecu by disconnecting the battery for about 20-30 minutes if you still have that problem then go to your local auto part store and ask if they can hook up the code scanner to your car.

 

It's an OBD1 car, he doesn't have a service connector (just the blue 2 pin connector to pull codes). The IACV typically causes the idle to raise or surge.

 

so i should clean the IACV? reset the ecu? and check if the calipers are loose for the ABS problem?

 

resetting the ecu will take away that abs light. if it comes on again then you know you got a problem. check your throttle cable sensor and get someone with a obd1 scanner to check it out if you cant fix the problem.. taking it to a mechanic will only cost alot because most mechanics lie and say oh the problem was this and that

 

alright thanks, but what about the low idle problem?

 

You can adjust the idle screw and see if that raises the idle. It's on the throttle body, like right above where the air intake connects. Use a flat-head screwdriver to turn it. Adjust the screw while the car is at operating temp.

Hope this helps.