b16a interminttent lean at idle

s300 and SManager software questions & answers
Post Reply
Skeet5204
Posts: 3
Joined: Thu Mar 22, 2018 9:26 am

b16a interminttent lean at idle

Post by Skeet5204 » Thu Mar 22, 2018 10:01 am

i have a 1994 civic si with a b16a turbo... this car ran great for two years and all of the sudden it went from a constant 14.7 afr @idle to 16+ witch causes popping and sometimes the car dies... i have tried new map, fuel pump, filter, ect, iat. for the most part the car does not run right but every once in a while it runs great. i noticed when i put a electrical load( headlights)ect it will change the afr to almost where it needs to be but then leans out again after a few min.

Skeet5204
Posts: 3
Joined: Thu Mar 22, 2018 9:26 am

Re: b16a interminttent lean at idle

Post by Skeet5204 » Thu Mar 22, 2018 10:19 am

Has any1 ever seen injectors cause a intermittent lean idle??? Should i send them off to be cleaned and flow tested??

darksands
Posts: 8
Joined: Mon Feb 18, 2013 5:39 pm

Re: b16a interminttent lean at idle

Post by darksands » Thu Mar 22, 2018 10:32 am

spark plugs? distributor loose? maybe a ground somewhere if changing electrical alters it? But I would also send the injectors to get them tested if all else fails.

Skeet5204
Posts: 3
Joined: Thu Mar 22, 2018 9:26 am

Re: b16a interminttent lean at idle

Post by Skeet5204 » Thu Mar 22, 2018 10:59 am

plugs are bkr7e , all tight, dizzy tight also.

User avatar
Spunkster
Site Admin
Posts: 18059
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata
Contact:

Re: b16a interminttent lean at idle

Post by Spunkster » Thu Mar 22, 2018 3:10 pm

It sounds like you have the wrong dead times for the injectors you are using.

2x0
Posts: 87
Joined: Sat Feb 04, 2017 6:51 pm

Re: b16a interminttent lean at idle

Post by 2x0 » Thu Mar 29, 2018 11:06 am

Watch your AFR and voltage while you induce electrical load and see if they are related. Maybe alternator is getting weak so your voltage is dropping lower than it has before with load, causing your injector dead times to read from a different parameter than normal.
'91 CRX, B18c1, T3/T4, 17psi on e85, FIC 1000cc's, S300 V3 P28

Post Reply