Droptop5.0

well once its warm the idle is smooth but thats the problem it won't stay warm what soever, it stays near 130-140 btw its a 89 5.0 engine, could the thermostat be stuck open or what else could do this, because i loose brakes also when there isn't enough idle thanks guys

corvetteguy

Sounds like you need a thermostat.
At least it is not
stuck in the closed position.
Make sure you buy a quality
T stat as the cheap replacements
will only last a year and you will
be doing a lot of labor again.
What is the rpms when the
brakes are working poor?

PRO50SC

Yeah, I would try a new stat.

Droptop5.0

ok new t -stat in and even a air filter since mine was shot, got a nice big k&N, and it still idles low once in a while and when it goes to 550 the brakes don't work that great, what do i need to adjust, also the temp gauge may be off since they converted the 86 dash to a 89, so any help with idle would help

FrostByte

Check & clean your throttle postion sensor.

Droptop5.0

when i clean there is no way i can mess how it is set right