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Subject Houston Z Auto Diagnostics
     
Posted by Dane (Houston) on May 11, 2015 at 12:47 PM
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Message I usually just post on facebook because its easier but ill try to start posting some more of our work and builds on here.. Here is a quick fix we had come in this morning.

Houston ZAuto is by far the most equipped Z shop in Texas with 300Degree N Probe, Nistune, and Snap-on diagnostic Tools, in house alignment machine and suspension Intercomp Racing scale system. Also On the Way!! A Dynocom Industries Dyno with Eddey brake for steady state tuning!

Shawn Smith brought in his 1994 300zx Twinturbo for us to check timing and set up the TPS sensor. With Nistune Developments Data scan we saw that the O2 sensor were near flatlined. Typically you would assume a lean condition or lazy O2 sensors. But by downloading and comparing the EPROM file we quickly found that Shawn had an AshSpec 555cc injector eprom (that was actually labled wrong on the epron sticker!) in his 370CC injector car. Thus setting the pulse width to short for 370cc injectors and causing a total lean condition. We dropped in a JWT eprom and sent this one down the road. This was an easy catch with our diagnostic skills and equipment.


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