Hello all i just finished my build after putting everything in and double checking when i turned the key it started right up but when i turned the idle down so it would be normal it doesnt want to idle just when i hit the gas...could this just be i need to get it tuned because big injectors?or some other issue..i dont want to take it to the tunner and have them charge me for some other issue

92 Da
motor jdm b16a
weisco pistons 9:1
eagle rods
acl bearings
arps
manley 1mm oversized valves
skunk 2-retainers, springs
gsr cams
port polish job
skunk2 intake mani

fuel:
walbro 255
aem fuel rail
aeromotive reg
rc 750cc injectors

running s300

if you need any more info just ask....im running about 42psi fuel should i turn it down?or just take it to get tuned??the only codes im throwing is vtec spool-which vtec isnt hardwired in yet,and ELD-which someone told me to disable that being its in a 92 da..thanks any imput is great!!!

 

Are you trying to turn the idle down while its warming up? Try to do it after its warm.

 

no i waited till the thermostat open and the temp went up

 

bump..need some advice before the tuners on friday

 

I don't know but for me I had the same problem. I had some 880cc injectors into my boost single slamer. Had a crome base map on my ecu to run the 880cc injectors and e85 so I can get to my tuner. My idle fine when cold but when it's warm it tend to die on me once in a while. Idle pretty ruff like it surging from 500-700 rpm. After I got it tune it was perfectly fine.

 

ya thats what it seems to be doing jumping around, and plugs are telling me its runnin really rich

 

have you messed with any setting on the S300 to try and get it to idle right?? have your tried to turn the idle down from the S300 and not the idle screw?

 

yes everything ive been doing with the idle is in the s300...it just seems like its geting way to much fuel

 

Its going to the tunner tomorrow anything else anyone can think of?

 

Have you told crome about the 750cc injectors? They'll dump nearly 3x as much fuel as stock.

 

did you just adjust the idle screw while it was running?

I always have people follow this idle procedure, and it solves most of the idle issues I can find:

First off, alot of tuners that have a hard time getting a car to idle will turn the idle up to where it smooths out.

Aside from that here is the info:

warm up the car completely.

Next, unplug the IACV and let the idle settle (siometimes you have to use the throttle to calm a surge down).

once the idle has settled adjust the idle screw so that the idle is 150RPM below the target idle set in the ECU (S200, etc).

once you have obtained that idle (I use a timing light with a tach for accurate results) shut off the motor.

plug in the IACV,

pull the backup fuse under the hood for at-least 10 sec. Re-install fuse.

start motor and listen to it rev up like normal, and it should settle right into the target idle spot and give you no issues.

This is all based around target idle for a reason; because if you try to set the idle to whatever you wish it to be and not the ECU setting, the ECU will be fighting your setting and start weird surges etc. Every car I have used this method on has worked like a charm.

If you haven't set the injector battery offset with a multimeter and a little time, I would suggest you do whatever it takes to get it dialed in... it is the culprit of most big-injector idle issues.