ok.. i been battling a bad idle problem for a while (u13) [Archive] - SR20 Forum

: ok.. i been battling a bad idle problem for a while (u13)


Andrew(nj)
07-21-2008, 02:54 PM
Ok here are the issues...when there's a cold start i have to tap the gas to stay on.at first then it idles rough..if i dont it sounds like its running on 3 cylinders
then dies..after that its fine....the vac pres would be at 20 vac at 800-1k but then it drops to 400-300k the the vac drops to 12-13..I did pressure test the system i found leaks and fixed it ...BUT when i pressure the system to 20-25 i get a leak at the adj FPR it seems the it leaks a lil at the top bolt to hold the adjustment....engine comp is good,i adjusted idle but still happens..timing is good.and i change the temp senor..spark plugs i have to double check...in the morning before i start the car to see if its wet with fuel...does this sound like a leaky injector...

ok.. i pulled the rail and none of the injectors were leaking ...but i did notice one spacer is missing..the one next the injector 3 ..and injector 2 was replaced..because all on the injecotrs are grey and # 2 is purple...i know purple injectors r 370's and greys are 333cc:eek2: ...and what if they but na injectors in wouldnt the car not run..if its a u13 ecu since its set to 370?



and should i pull the rail agian when the car is cold to see if that makes a dif since at cold starts this happenes...but at the same time i have that idle problem *** pressure test it agian..im just gonna cap the fpr..to see if i have anymore vac leaks...

jonwepa
07-21-2008, 09:51 PM
Dude, it is really hard to understand your writing, but it sounds like you might have the wrong injectors? A u13 ecu is set to run 370's not 333's. Are you sure they're 333's? Can you post some pics?

Andrew(nj)
07-23-2008, 11:40 AM
Dude, it is really hard to understand your writing, but it sounds like you might have the wrong injectors? A u13 ecu is set to run 370's not 333's. Are you sure they're 333's? Can you post some pics?

ya sorry bout that the orginal post is on the dash..i just copy paste things but...i swapped out the injectors to the 370
s but ill take a pic of the ones that where in my car...im still having idle problems ..im leaning toward a vac leak...if its not that then i dunno what it is...

jonwepa
07-23-2008, 12:29 PM
ya sorry bout that the orginal post is on the dash..i just copy paste things but...i swapped out the injectors to the 370
s but ill take a pic of the ones that where in my car...im still having idle problems ..im leaning toward a vac leak...if its not that then i dunno what it is...

Well, if it isn't the injectors, I definitely think you have a vac leak. Those vacuum leaks are a pain in the aZZ....check and recheck all your couplers,and don't forget around the throttle body, they is usually a hidden port on the throttle body. I found out this the hard way:(

Get a pressure tester or make one, makes things alot easier.
You can buy one here: http://www.siliconeintakes.com/index.php?cPath=8&osCsid=7bde9a07a52a48d149939f35a91ba24b