Anyone have this problem?It seems that it just stutters for a second or 2 when you floor it.We thought it was the N20 or the TPS swithc,but we disconnected it all.I was told maybe a crank sensor re-learn,anyone hear of this?We are going to start with the TB on Monday and start switching stuff to see if we can narrow it down.We also replaced the PCM witha band new one out of the box and it still does it.Any help would be really appreciated!!!!!!!!

 

Sounds more like a vacuum leak to me. Take your finger and block off the TB hole while the car is idling and see if it still runs, it should die.

 

This sounds either like a timing problem or your starving for fuel at WOT. Have you A-tapped your vehicle with the new mods?

 

when my EGR to intake tube leaked it did the same thing. could be a vacuum leak like mentioned before

 

Crank sensor relearn would maybe cause this and new PCM would need relearn also. I am not sure if you can do relearn without a Tech 2 monitor.Any body feel free to correct me here but i think im right. Also big cam and heads with little or no port velocity would have accelleration problems also.

 

Thanks everyone for the help.We think we narrowed it down.We pulled the exhaust down to replace the O2 sensors and the cats were both plugged!!!!!I think this might have been the problem.We are going to replace them and then go over the recomendations just to make sure!!!!!Thanks Big Time!!!!!!

 

Could be...

-huge vacuum leak
-mechanical problem
-messed up TPS sensor

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Slammed Vette:
<strong>Thanks everyone for the help.We think we narrowed it down.We pulled the exhaust down to replace the O2 sensors and the cats were both plugged!!!!!I think this might have been the problem.We are going to replace them and then go over the recomendations just to make sure!!!!!Thanks Big Time!!!!!!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Be careful if motor stumbles and then pulls hard, that wouldnt be clogged cats, and you should be sure of what caused clogged cats also or it will do it to the new ones.

 

Dynoed it yesterday with the stock programming in it and it's all good.One cats was completely melted closed and the other 90% gone.Suprised the car ran at all!!!It never sounded right to me.Even before we put the H/C in it.I guess we need to start checking the exhaust systems on every car fopr now on. Thanks for the help!!!We are going back to the dyno next week

<small>[ April 11, 2002, 12:09 PM: Message edited by: Slammed Vette ]</small>