3100 running rough

[himsa669]

thanks for the input will check out tomorrow. only had the car a week. dad drove it from california it was his parents. as far as i know only routine maintenance was done and it has a rebuilt tranny in it. 137k on the clock. do you think i could have shorted something out with the amp install or is this unrelated? its just weird it runs excellent when it starts it holds a smooth idle and revs awesomely but only in park lol. going to take a look inside the collum as well maybe something getting shorted out by the shifter when its moved.

[himsa669]

also noticed if the brake is pressed in it will kill the car as well. wtf? power steering pump makin little noise when cold and i little low on fluid bout to top her off. what could the brakes be doing to kill the car? i checked all over for vacuum leaks as well.

[bszopi]

Brakes are vacuum controlled (big hose going from the manifold to the brake booster), therefore when you press on the brakes, it puts a load on the engine. Almost sounds like your IAC valve might be bad.

[himsa669]

where is the valve located? is there a way to test it?

[himsa669]

also just noticed i can grab the top of the belt and move the tensioner a couple of inches very easily. is this normal?

[primesuspect]

def not normal.

[himsa669]

replaced iac and same results. goin to replace belt. fights a little longer with the new iac though before it dies.

[himsa669]

alright figured it out a couple days ago. started tracin all the grounds and found the tail light ground to be loose. tightened it down and it ran fine! thanks for the help

[Azrael]

Glad to hear it was an easy fix.