Car dies when coming to a stop.

[Florida240sx]

93 240sx Dohc 5spd no mods except 1500watt sound systemI figured it was my amp because it happened around the same time.It's been 4months now.When coming to a stop it dips down to 400-600rpms.If I have A/C it stays at 1100.I just ran seafoam through my brake booster line it it hasn't helped.Don't have any leaks.Only thing I can think of is a bad ground going to check tomorrow.Could it still be IACV?Just ran seafoam though figured it would clean it out.Any other ideas.Maybe fuel filter?It drops down and then goes back up to idle 700-800.Thanx

[NISTECH]

Running seafoam or any induction cleaner throiugh the brake line will really not do alot for the intake as a whole, especially the IACV. You need to run a bit of it through the 1 inch diameter hose coming off you intake tube by the radiator. The hose runs under the intake manifold and feeds your idle contol valves. The hose is located right next to the smaller 1/2 inch hose. The car will run pretty crappey with that hose not connected so you can put some in the hose hook it back up and fire it up,let it clear out from the hose and repeat the process a few times. If seafoam isnt availale you can also use carb clean and do it the same way. Another trick that works is to place a small metal tube or durable straw along the nipple of the intake tube and slide the hose over both of them. and TRICKLE a little water in there while its running. do not allow the water to run in there as a steady stream it will just kill the spark in the cyl but a fine mist of water being fed in works real well to clean carbon deposits in the intake chambers. The reason its not more widly used is the control factor , to much and you have a problem keeping the car running.

[Florida240sx]

Still got the problem...I'm thinking it could be grounding issue or fuel.When my AC is on it stay at 1100RPMS constant.never dips.But as soon as it's off my rpms will drop to 400 If at about 3500rpms and go to neutral.I don't think it does it while in neutral only after being under load....Or you think it's just not clean yet? Kinda wondering if it's a grounding issue ..My battery has some build up on the positive terminal.Which ground would be maybe a result of this?

[NISTECH]

The 2 on the intake manifold coming out of the engine loom. I think you may have more of a idle control valve problem itself.

[Florida240sx]

It's iffy now.Going to check my vaccum hoses.