Low Octane Ping??? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 02-17-2008
Member
Thread Starter
 
Join Date: Nov 2006
Location: Grovetown, GA
Posts: 30
Low Octane Ping???

Hi. J.T. here. My ranger is a 94 SuperCab 4.0 auto with 199,000K. I have a bad ping when under load or heavy acceleration. I've tried high octane gas, octane boosters, fuel system & injector cleaners. New plugs & wires. Cleaned MAF. New Fram Air Hog air filter. Nothing seems to help. Am desperate for some answers! Any input would be greatly appreciated.
Thanks,
J. Terry
Reply With Quote
  #2  
Old 02-17-2008
Member
 
Join Date: Mar 2007
Location: Upstate,NY
Posts: 2,598
First try some Seafoam through the brake booster line to the intake.With that many miles there are probably carbon deposits in the combustion chamber creating hot spots.
After that I would consider changing the O2 sensors as they may be old and out of spec telling the PCM the engine is running richer than it actually is.
Next on the list would be the Throttle Position sensor.Test and/or replace it.
Check the fuel pressure at the fuel rail.Should be around 60 psi I believe.Changed the fuel filter recently?
Reply With Quote
  #3  
Old 02-19-2008
williambuckle's Avatar
Member
 
Join Date: Feb 2008
Location: Fontana, Ca.
Posts: 1
Hey guys, I'm new here and I just got a free 92 4.0 ext cab that runs good but has the same ping under load... What is seafoam? thanx Wll.
Reply With Quote
  #4  
Old 02-19-2008
Member
Thread Starter
 
Join Date: Nov 2006
Location: Grovetown, GA
Posts: 30
Seafoam is a just a brand name, but their products are excellant! Tranny additives, motor additives, fuel adds., etc...
J. Terry
Reply With Quote
  #5  
Old 02-26-2008
Member
Thread Starter
 
Join Date: Nov 2006
Location: Grovetown, GA
Posts: 30
Low Octane Ping

Thanks To All, The SeaFoam thru the brake booster vacum line worked great.
Reply With Quote
  #6  
Old 02-27-2008
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Thanks for reporting back. As I was reading down through your description I was thinking it was combustion chamber carbon buildup. With that many miles on a motor, its usually the root cause.

What I usually do to all my cars: twice a year I run two cans of chevron w/techron FI cleaner in a single tank of shell 93 (v-power)
I've done that for years and have never had a problem. And the engines I've torn down all are very clean. Only once did I see a little coking on some valve stems. But it still wasn't enough to cause problems and was very minimal at high mileage.

btw, FI cleaners are not all the same. The "techron" cleaner is good stuff in my experiences of using and rebuilding my own engines.

Rich
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Misfire, Random ping, and black smoke TheChairman SOHC - 2.3L & 2.5L Lima Engines 1 06-24-2012 06:54 PM
LOW LOW LOW RPMS JRacer 4.0L OHV & SOHC V6 Tech 23 05-07-2009 12:25 AM
ping! powermanb3000 2.9L & 3.0L V6 Tech 16 09-15-2005 10:34 AM
Gas Ping Yakee General Ford Ranger Discussion 2 05-23-2005 12:43 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 08:38 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.