Corvette C4 Forum 1984 through 1996

84 Poor Performance at High Speeds

  #1  
Old 05-20-2007, 03:17 PM
Vette84's Avatar
Thread Starter
Join Date: Apr 2007
Location:
Posts: 3
Default 84 Poor Performance at High Speeds

Hey there all,

I've had my 84 for just over 2 weeks now and notice that it has very poor performance at anything around 45-50 mph and up. With my foot on the floor it doesn't even really rev it just slowly picks up it's speed. Anything from 65 mph and up is insanely sluggish, to the point of not worth even trying to get up to these speeds.

Any Guidance would be apreciated.
 
  #2  
Old 05-20-2007, 04:57 PM
beauchampgl's Avatar
Senior Member
Join Date: Oct 2006
Location: Superior WI
Posts: 156
Default RE: 84 Poor Performance at High Speeds

fuel filter, restricted exhaust, plugged cat, would be my firsr guesses
 
  #3  
Old 05-21-2007, 12:57 AM
Join Date: Feb 2007
Location:
Posts: 61
Default RE: 84 Poor Performance at High Speeds

why did you buy it?I am assuming everything was ok. when you test drove it before the purchase and now all these problems are starting to show up.Perhaps you need words with the seller.
 
  #4  
Old 05-21-2007, 06:31 AM
mech259's Avatar
Super Moderator
Join Date: Jan 2006
Location: Lumberton, Texas
Posts: 1,858
Default RE: 84 Poor Performance at High Speeds

Sounds like either the converter or the fuel filter is plugged. Checking engine vacuum at a manifold source would reveal converter contamination. Check vacuum at idle, then up to 2000 rpm, should come back up to original reading @ idle and should be around 17 to 20" of vacuum.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
vector89
Corvette C4 Forum
0
09-01-2012 12:58 AM
Joe Barton
Off Topic
0
07-25-2012 07:25 AM
lbelew
Corvette C4 Forum
2
08-21-2007 05:10 PM
mafulton
Corvette C4 Forum
4
03-23-2007 12:44 PM
white88
General Tech
1
07-25-2006 12:28 PM


Thread Tools
Search this Thread
Quick Reply: 84 Poor Performance at High Speeds



All times are GMT -5. The time now is 08:45 PM.