Engine pre-igniting around 55 mph? - Ranger-Forums - The Ultimate Ford Ranger Resource

2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

LinkBack Thread Tools Search this Thread
Old 01-16-2011
Thread Starter
Join Date: Jan 2011
Location: Quakertown, PA
Posts: 2
Engine pre-igniting around 55 mph?

Hey guys I am new to the Ford community so I don't know much about Rangers. I recently picked up a 2000 Ranger with a 3.0L 4 speed Automatic with 75000 miles. The truck runs great from 0-50 but when it hits 4th gear in overdrive it starts to pre-ignite. It is only when the motor is working pretty hard (up hills). The oil pressure is good and the temp is good. There is no check engine light. I just changed the oil and air filter. I read some posts and thought it may be related to the EGR valve. I got a new pdfe sensor which seemed to be a big issue with these trucks - no change. I also tested the EGR by putting a vacuum to it - the engine died down as it is supposed to. I am not really sure what to try next. I know it must not be major because it runs great otherwise. If anyone has an idea please help me out. Thanks
Reply With Quote
Old 01-19-2011
Join Date: Jun 2010
Location: SP, WI
Posts: 11
Reply With Quote
Old 01-20-2011
Join Date: Jun 2005
Location: Havertown,PA
Posts: 467
Sorry to say 3.0 pinging=Normal.Plugs will help for a little but always returns. 3.0 is a great motor but you will have to get use to this.
Reply With Quote
Old 01-20-2011
Thread Starter
Join Date: Jan 2011
Location: Quakertown, PA
Posts: 2
Ok that is cool, I am used to hondas which ping usually when the motor is overheating or the timing is off...is there a way to adjust the timing, there is no distributor right coil packs instead? Thanks for the help
Reply With Quote
Old 01-20-2011
Toreador4x4's Avatar
iTrader: (6)
Join Date: Apr 2007
Location: Livonia, MI
Posts: 3,958
go to your ford dealership and buy a can of PM-3 carburetor tune up cleaner. slowly ingest it into the motor through the vacuum line from the brake booster. follow the directions on the back (i think it says use 5 oz, let sit 15 mins etc) repeat this 3 times, change the plugs and oil right after (plugs after it cools, aluminum heads) and your pre-ignition will be reduced if not eliminated all together. There is an old TSB for this and it works really well
Reply With Quote
Old 01-28-2011
SkidPlate's Avatar
Join Date: Sep 2010
Location: La Crete , Alberta
Posts: 43
I had the same problem with my truck. It ran fine even after 50 when on flat road over 50 up hill the truck would buck and pop. Turned out to be the plugs and wires. Check your plugs for carbon tracking.
Reply With Quote
Old 03-04-2011
Join Date: Mar 2011
Location: easton ma
Posts: 5
clean the MAF ,use maf clean don't damage the wires, & throttle body ,carb cleaner works, use lucas fuel conditioner / injecter clean new fuel filter maybe sea faom it to should lesen it alot till it gets really hot and humid. its the heads/ chambers causing it to happen sharp edges in the combustion chambers they cause dieseling aka pinging. the sct tunner can help some to stop it from being so previlent, plus you'll get some power / driveability.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
1996 2.3 problems around 40 to 60 mph FlashBangJim SOHC - 2.3L & 2.5L Lima Engines 4 11-26-2014 03:47 AM
30 MPH accident and my ranger it totaled....A few parts for sale. RNGMSTR DOHC - 2.3L Duratec / Mazda L Engines 37 04-18-2008 06:05 PM
1999 4x4 shakes at 74+ mph on the highway, what gives??? LuckyRanger13 2.9L & 3.0L V6 Tech 4 04-14-2008 10:57 AM
145 mph fx4 General Technical & Electrical 55 11-12-2006 10:47 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 06:43 PM.

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.