I need information

["Matt Harger" <MJHarger@msn.com>]

My husband recently bought me an '86 Quattro 4000 series.  The engine has been 
replaced with an '87 130 hp.

After I drive for about 5-10 minutes, whether the car is cold or warm, it 
starts to bog down.  I can floor the accelerator, but it will only go about 15 
mph, no matter what gear I shift into.  It seems to help when I pump the 
accelerator.  It usually goes away in less than 5 minutes, but can be very 
annoying when on a busy road!  

Does anyone have any suggestions that can help me with this problem?

Thanks!