09-10-2012, 09:10 PM
Join Date: Jul 2008
Location: Minneapolis, MN
Total Cats: -1
Stutter/Engine cutting off
Having an issue here and cant seem to figure whats going on.
First mod list:
-8.8 supertech pistons
-ngk bk7e gapped at .045 with COPs
- 600 cc injectors running corn fuel.
- tuned at about 11.5 afr
-overboost protection set at 23psi
-Map line t-ed of fpr
It does not always happen it seems to be intermittent but when it starts it will last for a while and then will just go away.
If i punch it in 3rd gear, so a bit of load there, get to about 16psi i get a stutter like if i was hitting boost cut but not as violent. If i keep my foot on the gas it will keep sputtering until i let off.
Attached is a log. It all starts at 3072 seconds. What is strange is that RPM gets jegiddy and then all of a sudden duty cycle drops to zero and there is a lean spot right after that.
Let me know what you guys think.