air/ fuel ratio gauge
#2
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Location: BonnevilleHell
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Re: air/ fuel ratio gauge
Originally Posted by almikyska
How would i hook up a fair fuel ratio gauge?
You can connect all of them at the ECM. The connections should be soldered in order to get a good read from the O2 sensor.
The ignition comes from the Black connector block (cavity A6, Pink wire with a black stripe)
O2 Signal can be connected at the yellow connector block (cavity D2, should have Black with Purple stripe wire.)
O2 Ground can be connected at the yellow connector block (cavity D3, should have a tan wire in it.)
This will put your A/F gauge in parallel to the ECM'* own O2 sensor connections...you will see the same values the ECM is seeing.
Last caveat to all this: GM does not use a wide-band O2 sensor. The O2 sensor also lags behind the engine and is erratic at less than WOT, go it'* usefulness is for checking rich/lean when you stomp on the throttle and hold it down.
#4
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Re: af gauge
Originally Posted by almikyska
wow thank you that helps me out a whole lot. When you say the block you mean the plug under the dash?
When you take the trim off, you can see the computer (ECM) tucked up in the right corner of the dash (silver aluminum box with three large harness connectors going into it...and a lot of wires.) One of the connectors is black plastic, another is yellow plastic. That'* the easiest places to tap into the car'* wiring to read the stock O2 sensor.
Here a current thread on dropping the ecm to goof around with it. The pictures of the ecm and the dash are on the first page
http://www.bonnevilleclub.com/forum/...909&highlight=
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Re: af gauge
Originally Posted by almikyska
oh ok i understand. Do you know of any place i can get an af gauge for kinda cheap?
Meters: Summit Racing equipment has a pretty inexpensive round digital meter (looks like an old Cyberdyne gauge). K&N also sells a square one. Autometer sells an analog round gauge that works pretty well and is a little easier to read at a glance.
#10
with all the modded cars ive owned ive never had an issue with the cheap ones and i felt they were very accurate, being on a tight tight budget stinks id rather spend the extra money on something else