problem now need some help guys

[need boost]

Guys the other day my buick went running really bad, checked grounds and such , no luck till I pulled back out on the road and nailed it, ton of black smoke then took off and has been running good again since then. It is running hard but seems a little down on power still. I think the MAF is going south on me but not sure. I have a scanmaster in it but this buick is new to me and I am still learning about it. On a buick that is running GOOD what should all the readings be on a scanmaster? The AF is going to 255 when you nail it and with the hot wire kit it jumps up to 15.4 volts but I am a real newbie on these buicks, thanks in advance Daniel Ray

 

[XLR8]

255 is good - it is the max you will see for the AF. AF should be around 5 in park. You can try tapping the MAF while the car is idling and see if it stumbles - if it does the MAF could be going bad. The only way I know of to really check the MAF is to replace it with a known good MAF to see if your problems go away. MAybe someone will post the new address for gnttype.org which shows what all the Scanmaster readings should be.

 

[MistaScott]

There are ways to test the MAF but replacement with a known good one is the quickest way to do it.

The "tap test" as some like to call it is not a good one, especially if the sensor isn't hooked up to a voltmeter while you do it to note changes.

Check this out:

http://www.wellsmfgcorp.com/counterpoints/Counterpoint3_2.pdf

Great article.

 

[gnsrule]

I really dont know where i got this from, but im glad someones got it
http://www.rennie-macintosh.com/techarea/chips/chippage.html
I hope this helps...
Good Luck