Ok, the basics first:
b18c5 motor and tranny with 4.9 final drive
obd2 wired car with obd2 to obd1 harness and p28 s200
toda spec c cams (@ 0,0)
hytech header
short ram intake
2.5" mandrel exhaust
Street tuned to 13.5-14:1 with wideband.
The cams idle at columns 5 and 6 instead of the 1-2 range where the stock cams idled.....very low vacuum at idle.
The idle we kinda got worked out by advancing the timing and leaning out the fuel from a tuned itr cams map given to me by a friend.
But we couldn't get the lurching to go away on the hwy...
This is cruising between 3800-5200 rpms - which is 65mph to 85mph roughly in 5th gear with my tranny and final drive. I noticed this is between 1 and 10% throttle. It happens a lot between 2% and 6% throttle just cruising at those rpm/ mph.....
What should we check to get rid of this "stumble?"
It is quite annoying.
And if anyone has a stock itr motor with spec c map, please send it to me!
