engine problem? - Ranger-Forums - The Ultimate Ford Ranger Resource


General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-10-2015
Member
Thread Starter
 
Join Date: Jan 2015
Location: tampa, fl
Posts: 7
engine problem?

manual 5 speed 2.3 b2300 1996
in every gear but 1st at exactly 2.3RPMs-2.5RPMs it puts and jerks almost as if its not getting enough gas. it has new coil packs, fuel filter, water pump, oil.
need to know what to change next
Reply With Quote
  #2  
Old 01-10-2015
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,579
Don't change anything.

I would first put a can of Seafoam in the gas tank, do that once a year.

Your description reads like dirty fuel injectors or low fuel pressure, Seafoam will deal with dirty injector part.

The computer can adjust fuel flow for dirty injectors or lower pressure when cruising along but when you accelerate, foot on the pedal, the reaction time from the computer and O2 sensors will cause a delay, a hesitation.

The higher RPMs means injectors are not that dirty or pressure is not that low, so at lower RPMs the lower flow is not felt as a hesitation.

If you can rent/get a fuel pressure gauge it might be worth a look.
'96 should have 35-40psi idling, then raise RPMs to 2,000 and hold for 1 minute, pressure should hold at 35psi at least, it you see if dropping slowly maintain the high RPMs and watch gauge, if it continues to drop I would suspect Fuel Pressure Regulator(FPR)
Shut off engine and check gauge after 10 minutes, if should be no lower than 28psi.


A dirty MAF sensor can also cause bucking and hesitation, but that is usually across all RPM ranges not specific.
Reply With Quote
  #3  
Old 01-10-2015
Member
Thread Starter
 
Join Date: Jan 2015
Location: tampa, fl
Posts: 7
Quote:
Originally Posted by RonD View Post
Don't change anything.

I would first put a can of Seafoam in the gas tank, do that once a year.

Your description reads like dirty fuel injectors or low fuel pressure, Seafoam will deal with dirty injector part.

The computer can adjust fuel flow for dirty injectors or lower pressure when cruising along but when you accelerate, foot on the pedal, the reaction time from the computer and O2 sensors will cause a delay, a hesitation.

The higher RPMs means injectors are not that dirty or pressure is not that low, so at lower RPMs the lower flow is not felt as a hesitation.

If you can rent/get a fuel pressure gauge it might be worth a look.
'96 should have 35-40psi idling, then raise RPMs to 2,000 and hold for 1 minute, pressure should hold at 35psi at least, it you see if dropping slowly maintain the high RPMs and watch gauge, if it continues to drop I would suspect Fuel Pressure Regulator(FPR)
Shut off engine and check gauge after 10 minutes, if should be no lower than 28psi.


A dirty MAF sensor can also cause bucking and hesitation, but that is usually across all RPM ranges not specific.
Did the seafoam along with a tank of premium when i first got it. The problem got like 50percent better
Reply With Quote
  #4  
Old 01-14-2015
Member
Thread Starter
 
Join Date: Jan 2015
Location: tampa, fl
Posts: 7
Recently changed HELP!!!!!

3/22/13 axle seals
4/18/14 NEW: radiator fan, oil pressure switch, thermostat, water pump
6/28/14 oil change
8/1/14 NEW: EGR valve, mass air flow sensor
9/25/14 NEW: fuel filter, heater hose, ignition coils, spark plugs
Reply With Quote
  #5  
Old 01-14-2015
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,579
Are you near an auto parts store that will read your computer for free, most will.

CEL(check engine light) doesn't need to be on for codes to be in memory.
If there are codes write them down, they are specific and don't always mean what is listed on internet.

After they read it have them reset computer with the reader, engine may run rough for a few start ups as it will need to relearn sensor data
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
The difference between a 2005 4.0L Mustang engine and a 2005 4.0L Ranger engine. BlackRanger04 4.0L OHV & SOHC V6 Tech 15 11-21-2010 05:56 AM
5.0 HO engine, computer and engine harness, and t-5 for sale collinsjason68 8-Cylinder Tech 3 10-23-2010 08:49 PM
Engine Oil Problem Knocking *ENGINE GURU'S READ* Roach2004 2.9L & 3.0L V6 Tech 17 08-28-2010 11:20 AM
problem with engine and check engine light warner.325 SOHC - 2.3L & 2.5L Lima Engines 5 12-09-2009 04:48 AM
'95 2wd 4.0 5-speed engine and trans harness -vs- '97 4wd 4.0 engine and trans harnes lifted97ranger General Technical & Electrical 3 01-23-2008 12:48 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 06:44 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.