jdmkid808

i been having problems ever since i got my ls vtec started.
turned on that my ecu was fried q31 and my iacv was busted up.
so i bought a new iacv and borrowed my friend's p28 chipped and got it base map for my set up.
now my problem is that my idle is really low below 300 rpm and its running rich. my original fuel was 40 psi and low it down to 35 psi, but still no change of the idle. CEL code was 41 but my friend said he disabled it but still throwing.


anybody could help me out?? really want my car to run good asap.

silkypillows

code 41 is for heated oxygen sensor malfunction. it's most likely reading extremely lean when engine is rich, and it continues to pulse fuel. replace sensor and your idle should improve.

B_Swapped93

go threw the proper steps to fix the low idle. then replace your o2 that can cause you to run rich

jdmkid808

i started the car today and my idle was really low.. as i wait for the warm up 10-15mins
my idle change to around 700+ rpm.. i adjust the screw from my throttle body(sunk2 TB) but it doesn't change anything.. damn, i'm really confuse on this.. i was thinking of using stock inject and stock p28 ecu to break in the motor but i'm broke at this moment

any other suggestion??

B_Swapped93

really ? so nothing when you turned it FULLY counter clockwise was the iacv unplugged when you did it ? or does the car die when you unplug it

jdmkid808

i bought a brand new iacv and yes i did unplugged my iacv and tried adjusting the screw but NOTHING change..
but at the first warm up my idle was really low below 300- my idle wasn't not bouncing. so i waited 10-15mins for my car to warm up really good and my idle back up to 700+ rpm. i wanted to change my idle at close to 850 rpm.

tde_teg

hey im having about the same problem idle is very low at 300 rpm and it goes up and down slightly between 200-400 when i unplug tps it goes to 1000 and smooths out ive tried cleaning iacv but no change no vac leaks new fuel filter with both o2's "cuz it had a bum vavle seal and burned oil" a few days ago sounds like we have a similar problem

jdmkid808

mine bounces because of my iacv wasn't working properly and i also found out that my chipped p28 was burnt which it was q31.

now my problem is that whenever i start the car to warm up it starts at low rpm i mean very below 300- as i wait for my car to warm up my rpm slowly goes back up to 700 rpm.. so thats really weird..

jdmkid808

update: i changed my map sensor because it had a crack and cleaned out my throttle body. my idle is still low but it was a little better than the usually. also i notice that whenever i started the car it stay at low idle as i wait for about 2second it goes up to 1100 rpm than after few seconds it stay an 500- rpm. as i press the gas it goes back to low idle again.. so i have no idea how to solve this problem..

anybody having this type of problem?? and i forgot to mention that code 41(o2 sensor, 17(VSS) is throwing codes and i have an exhaust leak. im gonna try to change my tps sensor tmw since i have extra.

silkypillows

does your tb utilize a FITV? it sounds like it's sticking/adjusted incorrectly. they seem to become open over time, but yours seem to be too far closed.

improper adjustment of an FITV can cause low cold idle and also bouncing idle when warm.


fix your CEL. if the o2 sensor or it's heater is malfunctioning, your car may be doing what your describing because of this code/sensor.

jdmkid808

i'll look around if i have a good working o2 around the house. also i am using an aftermarket skunk2 throttle bode which it doesn't have the FITV.

jdmkid808

still no luck. i change the tps, map, cleaned the TB, adjust the screw from TB and still dont do any change..
i was thinking of running stock injects and stock p28 while i break in the car and hope to get it tuned with hondata when i have the money.. any other things i could do to make my car run good?