Sunday, May 16, 2010 - 10:12 pm, by: Mario Lentini(Lexus94)
When you say running lean is it that you can hear detonation (pinging) when you stab it ? . What injectors are you running and how much Boost do you have , how much better are the heads flowing after Barbo did the work on them . First thing I would do it see what fuel pressure you have through the rev range .Have you had it on a dyno with this problem to see what the A/F ratio is and how much timing is in it . Are you still running the AFM , it may be playing up .
If the heads are working a lot better from the old stock heads you will end up with better air flow and in doing so you end up with less boost , to make up for that you would go to a smaller top pulley and push it boost back to say 5 or 6 PSI BUT you also end up running the blower faster and it becomes less efficient , heats the air and that when you start having detonation problems .
Just throwing a few things at you , hard to say when can't see or head the problem . May not help but look at fuel pressure I think and boost you are running .
Sunday, May 16, 2010 - 11:15 pm, by: Joshua White(Joshua_88)
full dyno tuned. running 440 injectors. 8psi. had it pressure tested and flow tested not too long ago. may have to again. running a 3 bar map sensor no AFM. Was running beautiful and after going for a 6hour drive it started playing up. been running this set up for like 6 months at least now....
Monday, May 17, 2010 - 08:08 pm, by: Mario Lentini(Lexus94)
I think you need to find out what the A/F ratio is and fuel pressure . Are you running 8.5:1 pistons ? with that set up 8 psi shouldn't be a problem , I had 10psi but with the 2.3lt whipple and it would just start to ping at about 6000 , this was with a stock ecu .
Monday, May 17, 2010 - 09:03 pm, by: Joshua White(Joshua_88)
stock compression. when i try to give some throttle is goes to 15.5/1 AFR. so yeah pretty lean. new pump, new filter, injectors been taken out and cleaned. whats left in the fuel delivery system? could a pressure reg be failing?! very very frustrating. tuned been looked over and that side is fine. something mechanical seems to be stuffed
Tuesday, May 18, 2010 - 01:33 pm, by: Mario Lentini(Lexus94)
If you know that pump is good and everything to the engine is fine I would get a reg and try it , are you running a raising rate reg also .Wow thats getting up there with the AFR
Saturday, February 12, 2011 - 11:52 am, by: Darren McPhail(Doggmacgt)
Hey Guys new soarer owner, having a few problems I have a charged V8, it has over the last few days started loosing power especially in low rev range, checking codes it came up with code 24 (air temp)and both banks are running lean. any ideas, any help would be greatly appreciated
Saturday, February 12, 2011 - 12:41 pm, by: Matt Petersen(Mattmannz)
You should start a new thread Darren.
Probably include more info about the motor and if it has been modified and how you know it's going lean.
Code 24 might be okay if it's got a piggy back - the AFM has the air temp sensor in it so if it's now running a MAP then it might have been disconnected.