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question on throttle response??

  • Thread starter Thread starter hardflip
  • Start date Start date Aug 13, 2004
H

hardflip

New Member
Aug 7, 2004
17
0
0
Washington
Aug 13, 2004
#1
  • Aug 13, 2004
  • #1
When revving my engine I step on the gas and when I let off real quick it takes a second or 2 for it rev back down. This makes it not sound to cool and it's probably something bad. What can I do to fix this problem
 

Venom4.6

Founding Member
Jun 30, 2002
1,356
0
0
Saint Louis, MO
Aug 13, 2004
#2
  • Aug 13, 2004
  • #2
TPS might be going bad or out of range at idle. Probe the middle wire on it and see what the voltage is. Should be between 0.96-0.99 vdc at idle.
 

KDK1988GT

Founding Member
Jan 7, 2002
1,937
0
37
Fredericton
Aug 13, 2004
#3
  • Aug 13, 2004
  • #3
yeh

also run a fullsweep test on it .. probe the middle wire (green)use a multimeter.. turn the key on.. then move the throttle.. should at full throttle be close to 5V... watch and see if there are no gaps while slowly moving the throttle to full throttle. And like Venom4.6 around .96V to .99V with the key turned on.
Good luck man
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Aug 14, 2004
#4
  • Aug 14, 2004
  • #4
ah, the stock reciprocating mass is heavy - it will take a min to come down (as it takes a min to go up, compared to a lightened alum set up). maybe im missing something here.

a vac leak can also cause the idle to hang for a sec or two, before returning to idle.
good luck.
 

N8Miller

I need NOS....make it 2 of the big ones
Founding Member
Jul 26, 2000
2,661
0
0
Kingston, PA, USA
Aug 14, 2004
#5
  • Aug 14, 2004
  • #5
how about just trying to spray the IAC and t-body out with carb cleaner?
 
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