Intake manifold leak? - Ranger-Forums - The Ultimate Ford Ranger Resource

DOHC - 2.3L Duratec / Mazda L Engines Discussions and Topics specific to the Duratec 4 cylinder engines

LinkBack Thread Tools Search this Thread
Old 11-27-2010
Thread Starter
Join Date: Nov 2010
Location: Norfolk, VA
Posts: 2
Intake manifold leak?

Hi, new to this thread. I have a 2003 2.3L Ranger, 5 speed. I am trying to determine why the truck runs so bad.

I have little power and retrieve the following codes:
P0300, P0301, P0304, P0316.

I recently replaced the cat converter and both O2 sensors. Also replaced plugs and wires, as well as air filter. When I rev the engine to ~3000 rpm I hear a distinct sound like a vacuum leak. I have sprayed starting fluid along all vacuum lines and cannot find any leak. I am having trouble getting all the way around the intake manifold to test for leaks there. any other ideas/suggestions?

Thanks for your help!
Reply With Quote
Old 11-27-2010
87xlt's Avatar
Join Date: Jun 2008
Location: In my truck!
Posts: 875
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0316 Serious misfire in first 1,000 engine revolutions
Reply With Quote
Old 11-27-2010
Join Date: Nov 2010
Location: mt.desert , maine
Posts: 9
yes,.,,,,,,i have had the same problem......mines a 2001 2.3

i had it checked and found out the the INTAKE MANIFOLD itself wasnt BROKIN ON THE INSIDE..... theres a metal shaft that moves the flaps ( not know what they are called) to allow proper air flow.....
hopefully this gets u in the right direction........
Reply With Quote
Old 12-02-2010
Thread Starter
Join Date: Nov 2010
Location: Norfolk, VA
Posts: 2
Thanks to all. Turns out it was a bad coil. No there are no codes and it's full speed ahead!
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Head gasket/intake manifold leak Yetirider General Ford Ranger Discussion 0 02-27-2012 07:31 PM
4.0 intake inside manifold antifreeze leak to engine bud General Ford Ranger Discussion 1 01-15-2011 06:52 PM
Intake Manifold Gasket/Intake Manifold fordboston 4.0L OHV & SOHC V6 Tech 6 01-25-2010 10:37 PM
manifold leak Lemaymk 237 2.9L & 3.0L V6 Tech 1 09-20-2008 12:46 PM
Exhaust Manifold Leak Hefavitzen SOHC - 2.3L & 2.5L Lima Engines 4 06-29-2006 03:30 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 06:12 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 and affiliated sites.