RPM drop to 500 - engine stall when i come to a stop

**osix** · 15-01-2007, 12:56 PM

Yesterday after i install a new AMplifer ( not sure if it related)

while i was driving my My Rpm seem to drop . to 500 when i come to a stop . i was so worry that it will stall on me . so i keep reving it up to keep 1000 .

hm.. any idea what is happening ?
and what are the common problem for such problem .

i was thinking if my Engine oil need changing .
or anything lacking ?

recently i found my radiator water rusty so i open up the engine and pump water in it to wash it . .
i even turn on the engine while i pump water in it ..
but after that the car run fine /

just today it running weird .
and when i come to a top at a red light the car almost stall on me . and when i do a stop at a shop to buy some drink . the car stall before i turn the engine off .
.
on the drive back when i try to make a U turn . the rmp drop to 500 almost lower . any idea why .

**Vios-GT_07** · 15-01-2007, 03:41 PM

would this be a 4A-GE smallport by any chance?

**BeRad** · 15-01-2007, 04:05 PM

what sought of car is it?

how bigs the amp, if its a big amp sucking alot of power, the engine will stall but has to be using alot of power to do this.

did you have the air con on? if so point the finger at the idle up valve.

your oil doesnt need changing, well it might but its definately not related.

the water in the radiator will go rusty over time if you use water, use coolant and change it when you change the oil it will keep things a bit cleaner and wont clog up your water galleries with rust and shit.

**osix** · 15-01-2007, 04:16 PM

My car is a Ta22 -
i am using a 1GFE engine .

- any idea what happen and my RMP drop to 500 ?
worry me alot as it like going to stall every time i stop at red light and make a U turn . - whahahha
any idea anyone

**The Last Streetfighter** · 15-01-2007, 05:04 PM

http://www.twincam.info/index.php?showtopic=24733

**ace** · 15-01-2007, 09:51 PM

If its related to the amplifier (or entire sound system), you might need a bigger or newer alternator to keep the current up....

**osix** · 16-01-2007, 03:53 AM

- Hmm i test the car today and is fine ?
but after abot 30 min of driving this start to happen ..

specially when i bring it up to 5th gear .

can it be possible the fuel line is having a problem ?
any other reason for such problem

**TooF** · 16-01-2007, 10:04 AM

ISCV possibly needs cleaning ? its a fairly common sympton of a clogged up ISCV

**osix** · 16-01-2007, 11:48 AM

what is a ISCV ?
can you show me some photo or where is it on a 1GFE
anyone can advcie on how i can clean it .

i don't think a Thai workshop know is a ISCV unless i point it to him or at least know where is it . to explain

**TooF** · 16-01-2007, 11:52 AM

idle speed control valve. it controls the bypass pass the closed throttle plate. they get gummed up with oil and crud. it will be mounted on the inlet plenum usually parallel to the throttle plate