6 replies to this topic

[vaspeedjunky]

Ok I just started my 87 CRX SI for the first time today and two things happened. First. When I start it up it revs almost to the red line. so I had to shut it off. then I took two vacuum lines off that are on the TB and pluged them up and the car started fine. Then if the car is cold the car Idles ok. once it warms up it starts surging between 500 and 1500rpm. I was Thinking TPS sensor. what do you all think of this. the car drives and runs fin. just that rev problem and Idle problem.

[lemons]

the search button is your friend....

it could be air in the coolant, bad tps, and other things

[LEW]

redline? woah...it's prob not a sensor

i would say sticking throttle cable/tb collet

or a sever vac leak, like the pcv valve came unhooked (it's easy to see it on the intake, but it disapears below the intake, into a black foam pod on the back of the motor above the oil filter)

my best guess

btw, next time u work on it, have the neg bat terminal already loose incase it revs up and it's not the tb or cable.

[LEW]

surging is cause u removed the vac lines from the cold idle unit or u have air in the coolant

[vaspeedjunky]

Ya the surging was cause of air in the coolant. The reving was the ashpot diaphragm. So I just took the vacuum line off of it for now and she runs great.

[RTM]

how do you get air out of the coolant? seriously i don't know and this may be one of my problems also.

[lopezi]

how do  you get air out of the coolant? seriously i don't know and this may be one of my problems also.

<{POST_SNAPBACK}>

There is a bleeder valve that you open and you can either run a tube to a bucket or just let it spatter over the engine (yes I found out the hard way..). The procedure is covered in the service manual located elsewhere on this site.