Gotta 91 swap in a civic...iam having idle problems

it idles fine until it warms up and then just drops and wants to stall...but doesn't stall....and shoots back up an might stall once in awhile.....Could this be because of the cut thermostat...I had to cut the thermostat to get coolant flow constant... because my rad hose was blowing up with air...so the question is, the cut thermostat a leading problem on why my idle is doing this?

Also coolant is in the overflow box bout half ful which i know is a problem but had my head gasket replaced....pleez someone help!!

 

does it idle up and down ? on and on and on ?

 

Yeah...you have a resolution?

 

could be TPS

 

Allready changed it

 

clean your idle air control valve
and your throttle body

 

Aight bud

 

well your overflow box is supposed to have coolant in it.. that's not a problem.

any air in your coolant system can cause idling problems.

if you installed your tps without properly setting its voltage, then that could be the problem

also examine your eacv, and fast idle valves,
there are holes in the throttle bodies inlet that can tell you if they're working when they should.
put your finger over them to feel for suction at the proper time.

 

ok will do but i am still having the idle problem