Good morning DSM'ers
I have gotten idle surge for sometime now, and if you are talon digest reader or irc.dsm.org chatter, u've probably seen me yapping about my idle surge.
car started to idle surge with CEL on for about month or two now. with some serious procrastination, and lack of funds.
here's how the car acts;
cold morning, starts up fine, idles fine, 5 min after drive to work, at a stop sign, starts to idle surge from 800rpm to 1300rpm. continue to work, some days the car will kill when clutch is depressed (pretty dangerous because power steering cuts out), but some days it will idle high or really really low (250rpm). it gets quiet annoying.
here's what i've done;
1. checked the vacuum of the intake with vfaq's homemaid vacuum tester.
2. went to ahpproduct.com's owner Chris to get it diagnosed, but his OBD2 diagnostic computer was broken, but he thought it was the map sensor (many peeps at talon digest disagreed on this), he also checked the idle speed screw but that was fine.
3. i know my o2's good because my a/f gauge is bouncing back and forth normally, and at WOT, it reads nice green rich.
4. i also know my ISC is working (maybe partially) since when i pop on the air conditioner, the idle jumps to 1200rpm and stays there.
5. my exhaust don't smell rich at all.
here are my questions:
1. any dsm'er in my area have a pocket logger or any cheap way to pull engine codes?
2. how would cleaning the isc and throttle with the carb cleaner help? i'd like to try this probably today, but probably wont' get time.
3. would bad battery terminal cause this?
4. would MAP sensor (manifold air pressure only on 2Gs) cause this since ECU is reading wrong manifold pressure?
5. a person told me that he had same problem but his throttle cable was too tight, how can i check for this?
6. maybe spart plugs? (mine are all new NGK's properly gapped and have magnecore 8.5mm something wires maybe 5k miles on these)
7. maybe there's a leak i cannot detect with the homemaid vacuum tester?
any help would be greatly appreciated!
thanks guys.
dsmtuners ROCK!
