I finally got the speedometer to work in my car after installing the T5 and enabled highway fuel mode at 60 mph. I have an AutoMeter A/F ratio guage and when it goes over 60 mph the light dissapears completely like the 02 sensoe isnt putting out any voltage. Could it really be THAT lean ? I got the AFR set to 15.4 at all RPM. It sort of scares me :/

My idle question. When I start the car (hot or cold) the idle shoots up to 1500-2000 (bad for a cold engine with no oil pressure) then it takes about 4-5 seconds for it settle back down. I played with the IAC park steps and set it to 160, 120 and currently at 20 with no effect whatsoever. What's the deal ? :/ Should I reset the IAC again ??

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1991 Z28 5.7 TPI

ZZ4 heads, ZZ4 cam, Harland Sharp roller rockers, Accel base, SLP siamesed runners, 52MM SLP Throttle Body, Hooker Headers, Flowmaster catback, MSD6A ignition, Home made ramair system, aluminum driveshaft, WC 5-speed etc

 

Are you running a manual transmission BIN? If your still running the 350/auto bin I would highly recommend starting with a 305/manual bin then adjust the injector constant and cylinder size constant. You'll find that the car will run MUCH better over all. The highway mode your seeing is normal, I have one of those AF ratio gauges and it does the same thing...

Brendan


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1987 IROC-Z L98,SR,EB 6085's,LPE 219/219 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