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-   -   Running rough (https://www.gmforum.com/buick-172/running-rough-308258/)

shawn_s 10-31-2014 07:40 PM

Running rough
 
My 97 PA seems to be running ruff like when i get on the gas..
I did a tune up about a month or 2 ago.. And this week i noticed its running rough when i take off from lights & pickn up speed to get on the highway like the the car vibrates & everything..
Nothings wrong with the exhaust, nothings wrong with plugs/wires ect...
I need help..

Tech II 10-31-2014 08:03 PM

Not sure of your description....is this like a misfire? Fuel starvation?

Any codes?

Try running with MAF disconnected?

Check the vac line to fuel pressure regulator, for fuel?

shawn_s 10-31-2014 08:57 PM

I would say possible fuel starvation.. its like if i take off lightly on the gas its fine takes off smooth.. Say i press the peddle maybe a quarter of the way down.. It sounds ruff & not smooth like before

shawn_s 10-31-2014 09:36 PM

Jus checkd the FPR lone and it has a little moisture in the line.. Im about to run and grab one hopefully it fixes the problem

shawn_s 11-01-2014 12:24 AM

Swapped it out.. Problem still there.

Soft Ride 11-01-2014 03:52 AM

Fuel Filter changed lately?
Pressure at rail ok?

shawn_s 11-01-2014 11:45 AM

Changed whn i gave her a tune-up! And yea the pressures ok.. Now.. The fpr screen had rusted out.. Thats bad..

Tech II 11-01-2014 01:22 PM


Originally Posted by shawn_s (Post 1606434)
Changed whn i gave her a tune-up! And yea the pressures ok.. Now.. The fpr screen had rusted out.. Thats bad..

Screen? What screen....you said you replaced the FPR, that includes everything.

When we asked you to check the vac line to the regulator, we were talking about fuel, not moisture....

shawn_s 11-02-2014 12:08 AM

the FPR has a screen on the bottom side.. The old one was old & needed to be changed...
And im talking about that! On the old one it was rusted out.. If tht makes sense.. It had holes in it..


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