I just bought an AE93 Corolla SX SECA with a 4AGE small port and I'm having some low idle problems with it. On cold start it sits at 2k and goes down to 1k once warm but after a bit of driving the idle hovers between 800 and 1k and then drops to 500-400rpm. It sometimes just stalls but not often.
From what I've read it could be the TPS or dirty throttle body? Not sure, just wondering if anyone else can shed any light on this. Im reading that some just raise the idle via the idle screw to solve this issue?
I did notice however that when the idle goes down to 500 it then tries to hover back up and when that happens the battery gauge dips a bit. Its worse when the head unit is on but not by much. Maybe its a battery problem?
EDIT:
Decided to take the car for a drive into the city, idling really rough once warmed up. Got stuck in traffic and the car was stalling every time I moved and then clutched in. Something else was that while it was rough idling the dash lights and head lights would dim and then once I got moving again they'd be brighter. I've replaced the battery with a known charged one and it hasn't fixed anything.
Parked the car and had dinner and then drove home however the idle somehow stabilised at 600-650. I had the A/C running too. For a good half hour on my way home the rpm stayed stable at 600-650 except when I clutch in it drops down to 500 or so and then sits at 600-650. Im thinking raising the idle via the screw?
From what I've read it could be the TPS or dirty throttle body? Not sure, just wondering if anyone else can shed any light on this. Im reading that some just raise the idle via the idle screw to solve this issue?
I did notice however that when the idle goes down to 500 it then tries to hover back up and when that happens the battery gauge dips a bit. Its worse when the head unit is on but not by much. Maybe its a battery problem?
EDIT:
Decided to take the car for a drive into the city, idling really rough once warmed up. Got stuck in traffic and the car was stalling every time I moved and then clutched in. Something else was that while it was rough idling the dash lights and head lights would dim and then once I got moving again they'd be brighter. I've replaced the battery with a known charged one and it hasn't fixed anything.
Parked the car and had dinner and then drove home however the idle somehow stabilised at 600-650. I had the A/C running too. For a good half hour on my way home the rpm stayed stable at 600-650 except when I clutch in it drops down to 500 or so and then sits at 600-650. Im thinking raising the idle via the screw?
