sc300 1j running lean at idle
02-23-14, 03:18 PM
#1
Driver School Candidate
Thread Starter
sc300 1j running lean at idle
hello I got a 93 SC 300 with a 1jz swap finally got around to hooking up the aemwide bandand the car is running Lean n poping everything is pretty much stock decides in aem fuel pump fmic and 3in exhaust and the 12v mod checked all of the vacuum lines and the fuel lines and it is starting to hesitate under boostif anyone has any opinions let me know thanks
02-23-14, 03:38 PM
#2
1JZ Single SC400
iTrader: (59)
Join Date: Jan 2009
Location: Alabama, Roll Tide!
Posts: 8,518
Likes: 0
Received 15 Likes
on
12 Posts
What is the wideband showing?
Why are you running boost if lean? Or what AFR is it showing, and how many pounds of boost?
Stock twins?
Check for vaccum leaks?
If you are running a AEM standalone, I would highly recommend you undo the 12 volt mod.
Why are you running boost if lean? Or what AFR is it showing, and how many pounds of boost?
Stock twins?
Check for vaccum leaks?
If you are running a AEM standalone, I would highly recommend you undo the 12 volt mod.
02-23-14, 03:47 PM
#4
1JZ Single SC400
iTrader: (59)
Join Date: Jan 2009
Location: Alabama, Roll Tide!
Posts: 8,518
Likes: 0
Received 15 Likes
on
12 Posts
I have seen an idle with a 17.9 on the AFR at idle. Mine on the other hand, has to be rich. Everyone swap is different, due to injectors, size, pump, standalone, ecu, etc.
02-23-14, 04:21 PM
#5
Driver School Candidate
Thread Starter
17 to 18 in idle. I checked vacuum leaks and boost leaks and there was noneI'm on stock injectors and stock ECUand when I gone to boost there's a hesitation before kicks inthat air to fuel ratio is about 13 to 12 12 to 1 when I'm in boost and also I unplugged the oxygen sensor and it did nothing and it do no codes and when its at Idle I hear popping in the exhaust
Last edited by smiley954; 02-23-14 at 04:28 PM.
02-24-14, 12:05 PM
#7
Driver School Candidate
Thread Starter
i unplug the o2 today and could it for a ride around the block and it rode better and boggin out and not leaning out but what is weird that no check engine light came on .i order a new o2 should be here tomorrow
any inputs with the no check engine light ????
any inputs with the no check engine light ????
Trending Topics
02-25-14, 05:01 AM
#10
^ absolutely not. A stock car (which he has) should run fine. There is another problem. Don't tell someone to mask a problem with some half *** work-around if you don't know what your doing (which you dont or you would have found your issue instead of playing with fuel pressure via aftermarket reg) That's not a proper fix.
Op from what I've seen some of the older ecus won't trigger the cel for o2. When you did the swap, did you install new injector o-rings? I've seen cars do this before with that being the cause. If you replace the o2 I reccomend a denso brand part
Op from what I've seen some of the older ecus won't trigger the cel for o2. When you did the swap, did you install new injector o-rings? I've seen cars do this before with that being the cause. If you replace the o2 I reccomend a denso brand part
Last edited by Vrank; 02-25-14 at 05:17 AM.
02-25-14, 05:50 AM
#11
Lexus Test Driver
iTrader: (1)
Join Date: Dec 2008
Location: fl
Posts: 1,540
Likes: 0
Received 0 Likes
on
0 Posts
OP. based on your screen name you are in the 954/305 Area??
If so PM me and Ill send you my # and help you with your problem. N0$$$$ for me just some free help and advice.
If so PM me and Ill send you my # and help you with your problem. N0$$$$ for me just some free help and advice.
02-25-14, 06:58 PM
#13
Driver School Candidate
Thread Starter
^ absolutely not. A stock car (which he has) should run fine. There is another problem. Don't tell someone to mask a problem with some half *** work-around if you don't know what your doing (which you dont or you would have found your issue instead of playing with fuel pressure via aftermarket reg) That's not a proper fix.
Op from what I've seen some of the older ecus won't trigger the cel for o2. When you did the swap, did you install new injector o-rings? I've seen cars do this before with that being the cause. If you replace the o2 I reccomend a denso brand part
Op from what I've seen some of the older ecus won't trigger the cel for o2. When you did the swap, did you install new injector o-rings? I've seen cars do this before with that being the cause. If you replace the o2 I reccomend a denso brand part
02-25-14, 07:00 PM
#14
Driver School Candidate
Thread Starter
02-26-14, 06:59 AM
#15
^ absolutely not. A stock car (which he has) should run fine. There is another problem. Don't tell someone to mask a problem with some half *** work-around if you don't know what your doing (which you dont or you would have found your issue instead of playing with fuel pressure via aftermarket reg) That's not a proper fix.
Op from what I've seen some of the older ecus won't trigger the cel for o2. When you did the swap, did you install new injector o-rings? I've seen cars do this before with that being the cause. If you replace the o2 I reccomend a denso brand part
Op from what I've seen some of the older ecus won't trigger the cel for o2. When you did the swap, did you install new injector o-rings? I've seen cars do this before with that being the cause. If you replace the o2 I reccomend a denso brand part
hmm sorry vrank. it's no work around. I have a stock car and had the same problem (albeit I had a big holset turbo/manifold/external wg) minus those I had the fmic/exhaust/and fuel pump. and everything else that was stock. i would lean out at idle. there is a possibility the exhaust and front mount might be drawing more air than fuel hence the need to richen it up more.
