Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Reply
 
Thread Tools Search this Thread

  #1  
Old 10-08-2010, 09:28 AM
Scott Scott is offline
Liking the Ford Ranger Forum
 
Join Date: Jan 2010
Posts: 24
Default Knocking only in 4th and 5th gear?

I've been having a knock issue for awhile and it's driving me nuts. It only happens when the engine is warm and i give it light throttle in 4th or 5th gear. If I stomp on it it goes away. I have new plugs, wires, and coils so I don't think its ignition related. I rebuilt the injectors awhile back so I think that's ok too. Any ideas why it would knock under such specific circumstances?
__________________
1997 Ford Ranger XLT short bed regular cab
2.3L Lima
5 speed manual
Reply With Quote
  #2  
Old 10-08-2010, 11:46 AM
sgtsandman sgtsandman is offline
Tank Diver
 
Join Date: Mar 2010
Posts: 3,078
Default Re: Knocking only in 4th and 5th gear?

The only thing that seemed to help me with that was bumping the octane up to 89.

Cleaning the fuel system helps with idle and fuel efficiency but not much with knocking.
__________________
Sgtsandman's Work in Progress
2011 Ranger XLT, 4X4, 4 door Super Cab. 4.0L, 5 Speed M50D-R1HD, 3.73:1, 8.8" open differential, Jason Pace cap
1999 Honda CR-V EX, RT4WD, 2.0L, 5 Speed MT, 4.56:1, open differential
Reply With Quote
  #3  
Old 10-08-2010, 11:57 AM
Scott Scott is offline
Liking the Ford Ranger Forum
 
Join Date: Jan 2010
Posts: 24
Default Re: Knocking only in 4th and 5th gear?

I've bumped it up to 91 and it doesn't change anything. What I don't understand is why the motor sounds fine through the entire powerband on the lower gears but not in 4th or 5th. I replaced the head about a year ago, the entire top end is basically new. Does anyone know if this motor has a knock sensor?
__________________
1997 Ford Ranger XLT short bed regular cab
2.3L Lima
5 speed manual
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
5th wheel rangerwheelinmike General Ford Ranger Discussion 16 10-24-2010 04:38 PM
July 4th Fireworks STL Photography 3 07-05-2010 02:20 AM
The 5th annual BADAZZ truck expo Demon-FX4 Midwestern Region 0 06-18-2010 04:17 PM
Grinding in 3rd and 5th gears TransAmFSAS Drivetrain Tech 9 02-17-2010 07:58 PM
4th gear lost johnys Drivetrain Tech 1 02-07-2010 02:05 PM