[s-cars] Bucking under full throttle

[Robert Myers]

Bucking?  An engine miss at WOT, maybe?  If so, it's likely to be a failing 
coil for one cylinder.

Finding the missing cylinder isn't the easiest thing to do but this 
procedure may help.

Disconnect the electrical connector for injector #1.  Drive the car at WOT 
long enough to build up some boost.  Of course the engine will miss on #1 
but if an additional miss develops with boost then the miss is not in 
cylinder #1.  Go on to #2, etc, until you find the cylinder which does not 
get worse when at boost.  That is the bad cylinder.

You will get responses telling you that your power stage output (PSO - 
sometimes referred to as a POS with some justification ;-) ) has 
failed.  IME when the PSO has failed you get a full-time miss, not just a 
miss at boost.

At 12:55 PM 2/11/2005, Harold McComas wrote:

>I noticed this when pulling away from the toll booth yesterday. Does not 
>seem to do the bucking under half or 3/4 throttle only under full. I 
>searched the archives briefly and most posts refer to boost leak and 
>hoses. I have installed Samco hoses and Breeze clamps last year. Anything 
>else I should check while  poking around under the hood? I will not be 
>able to check it out until Saturday or Sunday.
>
>Harold M
>Manchester, NH
>
>_______________________________________________
>S-CAR-List mailing list
>S-CAR-List at audifans.com
>http://www.audifans.com/mailman/listinfo/s-car-list
>
>
>
>
>-- incoming mail is certified Virus Free.
>Checked by AVG Anti-Virus.
>Version: 7.0.300 / Virus Database: 265 - Release Date: 2/10/2005