acenase

I have a problem with my SC400 whenever I am going uphill and I apply the brakes, it feels like the car is about to just die out. I see the RPM needle going down and it idles around 300-400RPM. When I am on flat surface, it usually idles around 500-600. I haven't completely stopped on a hill yet just going really slowly like 4-5 mph. Any idea why it does this? kinda hesitating and such. Maybe the low idle to begin with? What is the SC supposed to idle at? I'm guessing around 1K RPM. Just not sure what to do, any advise?? Thanks.

cal9126

maybe its the idle air control....mine idles low at lke 5-600 rpms but im pretty sure thats where its supposed to be.....

acenase

do you know how to adjust it? like do I just turn that hex shaped screw clockwise a bit and it will start idling higher?

cooter2669

the IAC is a valve. it gets stuck on older sc's from being...well...old. a new one is insanely expensive. you can take it out and hand-clean it or even spray brake cleaner in while revving the engine. the latter solution should be taken to extremes. ut worked for me partially but it is a temp solution and will have to be hand-cleaned. good luck.