Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

Acceleration is crappy and RPM needle jumping?

Thread Tools
 
Search this Thread
 
Old 07-09-2011, 02:24 AM
  #1  
Junior Member
Thread Starter
 
a_ernst10's Avatar
 
Join Date: Jul 2011
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Acceleration is crappy and RPM needle jumping?

I have a 1989 Firebird formula 350 when it first starts up it seems fine but after a few miles it lacks power and if I floor it the RPM needle skipps and jumps and somtimes the passing gear wont kick in. Also when I slowly accelerate it gets shakey and boggy. Please whats wrong and is it one thing or many?
Old 07-09-2011, 04:28 AM
  #2  
Supreme Member

iTrader: (2)
 
dimented24x7's Avatar
 
Join Date: Jan 2002
Location: Moorestown, NJ
Posts: 9,962
Likes: 0
Received 3 Likes on 3 Posts
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Re: Acceleration is crappy and RPM needle jumping?

Sounds like an ignition issue. Maybe a bad coil or a failing ignition module. The tach jumping is from the ignition intermittently cutting out under acceleration.
Old 07-09-2011, 08:34 AM
  #3  
Supreme Member

iTrader: (8)
 
TTOP350's Avatar
 
Join Date: Oct 2001
Location: Il
Posts: 11,689
Received 745 Likes on 505 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Acceleration is crappy and RPM needle jumping?

Your plug wires are bad. sounds like some are burned thru and shorting to ground.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
IROCtometal
TPI
2
09-20-2015 11:08 PM
amcnellis
TBI
6
09-16-2015 04:16 PM
Stroopwafel
Tech / General Engine
7
09-11-2015 06:38 AM
IROCtometal
TPI
3
09-09-2015 10:01 AM
Jk_Under
Tech / General Engine
1
09-08-2015 08:13 AM



Quick Reply: Acceleration is crappy and RPM needle jumping?



All times are GMT -5. The time now is 01:23 AM.