I have a 94 Del Sol Si and it seems to run pretty good, except the car will randomly die at stoplights when driving it around, but start right back up. I'm thinking it has something to do with the brake booster. If I pump the brakes, the idle will raise up from about 1000 rpms to around 1500. Once I stop pumping the brakes, the idles drops down lower and seems to almost stall.

Already cleaned IACV and FITV, and replaced PCV valve.

Any ideas would be much appreciated!

 

Might be a vacuum leak in the hose to the brake booster.

 

Ignition related. Worn plugs, wires, cap, rotors or weak coil.
Main relay related.

Probably not particularly related to the brakes. Action on the brake switch and changes in the vacuum required by the booster will prompt the computer to stick in a bit of fuel, but then go back to trying to maintain a fuel efficient idle.

 

maybe injector going bad?


Posted from Honda-tech.com App for Android

 

Well I just bought the car, from what I can tell the plugs, wires, and distributor have been recently replaced.

Yesterday it was really hot out and the car wouldn't start. I came back after work that night when it cooled down and it started first try. I pulled the main relay out before and I didn't see any cracked solder points or anything.

Also, I replaced the check valve just because and it didn't solve it .