Gn Still Not Fixed

[QuikRick]

Well, I replaced my MAF and checked fuel pressure and those are both okay but car still has a kind of coughing sound coming from the top of the engine when idling and runs rough and no power. If car is idling and I give it throttle, should I be getting any boost? Don't know if you only get boost when under load driving but there is no boost if I goose it sitting still in park. Anyone have ideas as to where to look next? I did find a lose plug wire but that didn't solve the problem. Let me know if anyone has any other ideas. I hate to have to put this car in a shop.....:frown:

 

[Missouri T]

Not sure what all you've done already but:

Check and/or set the TPS voltage at idle....check the WOT value while you're there.
Check and/or set IAC numbers at idle.

NOTE: When you set the minimum air on IAC with the throttle body screw, it'll alter the TPS so you'll have to rest the TPS voltage again.

 

[BlackBandit]

You'll only build boost under load.

I would check your spark on all the cylinders and ohm out the coil pack and plug wires. Plug wires should be close and coil packs should read about 12k across the towers. If that's all correct I would run a compression test.

 

[QuikRick]

Not sure what all you've done already but:

Check and/or set the TPS voltage at idle....check the WOT value while you're there.
Check and/or set IAC numbers at idle.

NOTE: When you set the minimum air on IAC with the throttle body screw, it'll alter the TPS so you'll have to rest the TPS voltage again.

Like the guy in the caveman commercial said for his response = Yeah, ahhhhhhhh - WHAT? LOL I'm kind of a junior mechanic. I guess "WOT" is wide open throttle but what are the others? I don't have a scanmaster yet but would this help to determine the problem and is this what I need to check the above? Let me know and thanks for the help.

 

[BlackBandit]

I would go here General Maintenance and Up Keep and start with the spring cleaning and then do allot of reading.

 

[Project TNX]

Link us to Part I next time: http://www.turbobuick.com/forums/general-turbo-buick-tech/227520-my-gns-running-bad-need-help.html

 

[Missouri T]

Follow the links provided by the folks above then.....
Drum roll, please.......
Get a Scanmaster.
They're inexpensive and a must-have, in my opinion.