How do you program a chip (I've been burning a few chip already) to solve a lean condition while I am cruising and a rich condition at WOT??????

My XP240 scanner is giving me 158 for the block learn cell during cruising around stuff.
However, at WOT conditions, the O2 sensor is in the low to mid 900 mV, which is rich as far as I understand.

What can I program on my next chip in order to richen the mixture at cruise and lean out the WOT mixture.

My fuel pressure regulator is now set at 38psi, I dont want to go any lower.



------------------
'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(58psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.39sec @ 107.21mph
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph

 

Hey Doc,
How is it going, long time no talk.
I had some similar problems. Your still running the MAF setup huh?
I said screw it and went to Speed Density. Much more work to tune but definatly much more refined and alot more to change.

If your blm's are at 158 that is extremely lean. Get some very steady data, meaning , do a long cruise at the same throttle position and speed/load, then change a very small things at a time. Forget looking at the O2, it is a small sometimes useful tool, maybe for WOT it is good.. but thats about it.

Brendan

------------------
1987 IROC-Z L98,SR,EB 6085's,LPE 219/219 SR Cam, Crane 1.6RR, EB TPI Base, 58mm TB, Stock T5, 30lb SVO, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, Aluminum DS, 94 Disk Rear, Adjustable Prop Valve, Precision 3.73 Gears, Weld in Sub-Frame Connectors, Hotchkis LCA's, KYB Shocks/Struts, Poly Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm, Big stereo, 730SD Conversion.

To see the ROC, Check out the webpage Here

 

Hey. leirch,

I'm so fustrated with both of my Camaros.

I have another post on the drivetrain topic concerning my '87, check that out, please.

We should get together some time.

This Tuesday (tomorrow), I'm thinking of running at Dragway 42 with my current setup. And then, remain the Art Carr TC and reinstall the stock TC. But that is alot of work.

 

Yes, We could meet sometime, that would be cool. Although I haven't had much time with tuning. I've been tuning a motor on MAF and then to a decent/pretty well running SD system all the while running on 7 cylinders!...
So I don't know what a "good" calibration is like with this nice miss all of the time.

I read your article on transmission/drivetrain. I think RB has the correct idea. Let us know if it fixed it?
This post isn't going to last very long on the PROM board..


Brendan