Lean Issue
Moderator: Gaskleppie
-
gc8dc95
- Posts: 13
- http://phpbb3styles.net
- Joined: Mon May 05, 2008 5:21 am
- Location: IA
Lean Issue
I am trying to find my problem. My car runs and starts fairly well, but it seems to go lean very quickly when the boost pressure gets higher. The map is made by me on the street and basically want to know if I am out of fuel or if my tuning is wrong in this area. Its not the greatest map and is my first real attempt at it. I have since done a little more part throttle, so ignore the lower rpm stuff. 89 Prelude SI (B20A5) Precision SC61 MSD Digital 6 Plus/HVC-II Coil -8an Fuel Lines/Aeromotive FPR/Walbro 255/ Fuel Cell Precision 880cc Injectors??? Still trying to verify this? Could be the problem Running on E85 fuel As you can see in the datalog it seems to be doing ok getting into boost until up to around 9psi and then goes lean almost instantly. The car seems to run fine at under 9psi. I have, as you can see on the map turned the fuel way up in the boost portion to see if it helped and it did not. It seems to me that these injectors may be much smaller than previously thought or I am maybe not keeping enough fuel pressure. I am going to watch my fuel pressure the next time I get a chance to get the car out. I have a set of known 1000cc PTE on the way and I am really hoping it is that or I suck at tuning....lol. Any help would be greatly appreciated. Thanks
- Attachments
-
- b123_11082010_1839.elf
- 2nd and 3rd gear run
- (43.25 KiB) Downloaded 144 times
-
- base_first_startup4.cal
- Current Map
- (8.19 KiB) Downloaded 151 times
-
JaredKaragen
- Posts: 1504
- Joined: Fri Nov 23, 2007 4:00 am
- Location: Bay Area, Ca
- Contact:
I think I found the problem. After doing some reading and watching my datalogs more closely, I noticed the bat voltage at 11.5v. I went out to my car with a multimeter and discovered my alternator is toast. My fuel pump is only getting about 10.5v and isnt keeping the fuel pressure up very well at idle. So, hopefully this fixes my problem. It seems like it would cause my problems.