i was wondering if instead of hooking a scan tool up to retreive dtc's can you jump 2 terminals on the connetor under the dash to make the service engine blink a certain number of times to get the code. if you can what terminals, and where would i have to go to get the code from? thanks!

 

I believe theres a tech article on this at the www.thirdgen.org site.

 

sweet, just for anyone elese who is interested here is the link
http://www.thirdgen.org/faq/thirdgen.shtml#misc

 

So.. What was the code your car was throwing? I own a Snap-On Scanner wich has some nifty tips and tricks for every code.

 

it was code 32 which was something with the egr valve and code 43 which was low voltage at electronic spark timing circuit

 

Any tips or tricks for trouble code 44? Car is running lean. Just replaced alternator for overvolting (18-20 volts at times). Could I have fried my o2 sensor? Just replaced plugs, wires, cap,rotor, problem still there. "Service engine soon" code 44.
Help

1992 Z28 305

 

95% of the time code 44 is caused by a faulty 02 sensor.

 

There is no voltage sent to your O2 sensors. The O2 sensors produce their own voltage [0.1 v (lean) - 0.9 v (rich)] depending on how much oxygen is unburnt in your exhaust. Newer O2 sensors are contradictory to this because they have a heater circuit. Most of which have 3 or 4 wires in the plug. They are designed to heat theirselves up quicker so the engine can run in closed loop sooner.

Other things to check is your fuel filter. Low fuel pressure can cause a lean condition. Make sure your O2 wire has not touched the exhaust manifold. Check for vacuum leaks especially around the throttle body and intake. One last BIG thing to check is any exhaust leaks before (in front of) the O2 sensor. A leaking exhaust manifold gasket can "suck" air and cause the O2 to sense a lean condition. Other than all that.. replace your O2.

 

Thanks Mark, I gonna try that. they are cheap enough, ($18).

Thanks again
dean


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