gmrulz4u Posted May 30, 2003 Report Share Posted May 30, 2003 When it comes to the 2.8/3.1 engines, is their a certain amount of degrees Spark Advance that are considered "normal" or "in acceptable range"? The reason I ask is because I have an OBD ALDL Scanner and am able to monitor almost everything, and my ECM commands a Spark Advance of about 15 degrees at Idle, and 32 degrees at about 75% throttle. I have no idea whether this is OK or not? I am having an extremely hard time finding anything online that states what is "normal"? Especially for DIS ignition... THANKS! Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted May 31, 2003 Report Share Posted May 31, 2003 yes that is normal. You are having a hard time finding anything because the timing as you know is controlled by the computer. Its a program that is flashed into the computer, therefore making ranges hard to determine in a DIS ingniton system. Now if for some reason the timing won't advance, the car will not have any power. The car might even run like crap. At the very least, trigger the SES light indicating a malfunction in the computer. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 31, 2003 Report Share Posted May 31, 2003 What kind of scan tool do you have and how much did it cost? Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted May 31, 2003 Report Share Posted May 31, 2003 who? Quote Link to comment Share on other sites More sharing options...
gmrulz4u Posted May 31, 2003 Author Report Share Posted May 31, 2003 I use an AutoXray, it cost $149 and was WELL worth every penny! Their site is: http://www.autoxray.com They have a ton of dealers throughout North America. Here's a better link to the exact place I bought mine: http://www.autotestsys.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=ATS&Product_Code=ATX10110&Category_Code=AX Only $149 with Free Shipping and Carrying Case!! Keep in mind this will only allow you to Scan OBD I GM cars from 1982-1995. I just bought this one because I didn't really see a point of buying their full blown set-up with Ford, Chrysler, OBD II, OBD II Enhanced etc..etc... Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted May 31, 2003 Report Share Posted May 31, 2003 shit I wish mine costed that much. A little over $2000 here. Quote Link to comment Share on other sites More sharing options...
gmrulz4u Posted June 1, 2003 Author Report Share Posted June 1, 2003 $2000? What the hell is that? A GM Tech 1 or Tech 2 or something? I know the Snap-On ones are expensive, but I didn't know of any others that are THAT much... Quote Link to comment Share on other sites More sharing options...
JS91Z34 Posted June 2, 2003 Report Share Posted June 2, 2003 thats what I have is a snap-on! Quote Link to comment Share on other sites More sharing options...
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