mail tune on a 503
So far I have done a compression test, checked plugs for fouling/improper gap, checked wires, replaced opti (which was done after finding oil/coolant on the optical side of the unit), adjusted valves, checked multiple times for vacuum leaks, used the AFIT (Active Fuel Injector Tester) to ensure proper pressure drop on each injector, used noid lights to check for proper injector firing, and used a TECH2 GM Scanner to monitor activity of all sensors and made sure they fell within the proper parameters. I may have forgotten a few things, but all together I am 'fairly' confident that the car is mechanically sound (you can never be 100% on anything though).
The only thing I haven't done that i would like to do is run a wide-band on it to check the a/f through the power band. If there are any common issues that I should be taking a second look at let me know cuz Im still up in the air with this whole thing and really wanna pin point it.
The only thing I haven't done that i would like to do is run a wide-band on it to check the a/f through the power band. If there are any common issues that I should be taking a second look at let me know cuz Im still up in the air with this whole thing and really wanna pin point it.
What brand opti?
How did you test the wires?
Did you test your coil using an ohmmeter?
Did you use a vacuum gauge?
What was your IAC counts and TPS voltage readings?
What's your fuel pressure at WOT under load?
Got the opti from thepartsladi on ebay. Coil has less than 9k miles on it (same with the ignition module). Don't know of anyway to actually test the wires, other than ohmming them out, but i did spray a little water on them when it was dark out to check for arcing. Not to mention they were replaced shortly before i found the bad opti which i put on maybe 1500miles ago. Not sure what the exact IAC and TPS readings were but the IAC was operational (allowing for changes in idle request) and did not indicate unmetered air and the TPS did acknowledge throttle percentage request all the way to WOT. I have yet to run a fuel pressure gauge during WOT simply because that is not where my concern is. It is at cruising speeds on the highway with problems under approx. 1800 RPM in 5th and under approx. 2300 in 6th, yet if that could still cause issues I will be sure to check it.
Sorry to hi-jack, kinda, but I'm putting a CC503 into a 93 and I will need a tune soon so I have a few questions.
Is Ed Wright still "the man" when it comes to tuning 93's?
What should I set the idle to? Or is that something the tuner will know?
Is Ed Wright still "the man" when it comes to tuning 93's?
What should I set the idle to? Or is that something the tuner will know?
From what I have read, Ed Wright is one of the original LT1 tuners and that PCM4Less and MadTuner cam out after. But I believe any of them will do you right. I have a MadTuner tune and I am completely satisfied.
