Shutters and hesitates when accelerating at about 4k

[deyoungtsi91]

I have read some diffetent things but cant really find an anwser to my problem. After about 10 minutes of driving my 91 TSi starts to hesitate and shutter a bit at WOT as soon as I hit 4k. Iam also idling high like 1400, not sure if that would make a difference. I just put in new plugs and a new fuel pump. The car was doing this before the new stuff btw. I put in Bosch Platinum plugs but I read in a few places that NGK plugs are the way to go so I am not sure if that is the problem. My best guess would the plugs or possible O2 sensor. The wires and coil are also newer. Any help would be awesome. Thanks

 

[blessed1gst]

any check engine light codes?

 

[icemanracing]

what are your plugs gapped at?
Mine does this above 5500 rpm if my Spark plug gap is above 28 I try to run mine at 24. It also causes my car to idle at 1200rpm with the gap above 28, and 1000rpm at 24

 

[turboboy4]

I would definately check plug gap and the plug wires even if they are new could still be junk

 

[luv2rallye]

And put in the NGK's - dsm's run best with them.

 

[DSMTyson]

And put in the NGK's - dsm's run best with them.

I didn't know that. Thanks

 

[deyoungtsi91]

Will the NGK iridiums be the best? Also, I found the box from the new plug wires and they were a cheap knock off brand Ive never seen before.

 

[luv2rallye]

No stay away from the iridiums (http://www.dsmtuners.com/forums/newbie-forum/198308-spark-plugs-13.html#post1642842). Use NGK BPR7ES.

 

[RileyRobertson]

I was just having the same problem yesterday and changed my spark plugs, it works great now!