o2 reading high!

[Chatmanboy]

What's make the 02 go High? I'm between a 850-910. Could running reach cause o2 readings to go high?

 

[notacarlo]

The 02 sensors just provide info, they don't control anything. It gives the ecu a reference so it knows what's going on and it can make little adjustments. If you have too much fuel the regulator could be set too high or not functioning correctly. The maf also may be a little screwy since it monitors how much air is coming in and the ecu fuels accordingly.

The 850 is good for a wide open blast at the top of third, but 910 is a little rich. The narrow band readings are only useful to you at the top of third WOT. Anything in between dead throttle and WOT is negligible.

Is the air cleaner clean? Are the spark plugs in good order? Do your O2's fluctuate from 100-800/900 at idle?

 

[notacarlo]

Another note....

Looking at your signature, you have a TT chip and maf translator. Are those set as they are required to run together? I believe the chip requires the translator to be run with all the dips set at default and the chip can be manipulated to adjust fuel curve.

What is your fp set at idle. (specifically for a 85 hot air motor with an 86 ecu?)
Pull a little fuel out with the chip. For alky cars I believe you like the 02's to be around 750.

 

[Chatmanboy]

fp is 43 line off