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Old 04-05-2014   #27
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,686
Default Re: 1991 ZR1 ODB1 Port Location

Quote:
Originally Posted by roadczar View Post
No luck after replacing the plugs
Did the paper clip diagnostic:
http://youtu.be/tl7aOi9GetY

From what I could tell:
31 - Cam Sensor Missing or Too Many Pulses
33 - MAP Sensor Voltage High
44 - Oxygen Sensor (Left Bank Lean)
55 - Fuel Monitor Lean
64 - Right Oxygen Sensor (Right Bank Lean)
66 - ??

Looks like a mess?
When you have multiple MALF codes like this, first place to look is making sure the memcal is seated properly. Also, disconnect the BATT and erase. These may all be in history. Make sure to see if they come back, ie CEL again.
Also, make certain the ECM ground is in good shape. I hope you have an FSM.
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