4.0 Spark Plug Recommendation - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 12-31-05, 12:01 PM
Clay
Guest
 
Posts: n/a
4.0 Spark Plug Recommendation

'94 Mazda B4000 with 4.0 engine.
Which spark plugs are the best for this engine and why?

 
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 12-31-05, 12:01 PM
JimV
Guest
 
Posts: n/a
Re: 4.0 Spark Plug Recommendation

Clay wrote:
> '94 Mazda B4000 with 4.0 engine.
> Which spark plugs are the best for this engine and why?
>

It came with Autolite platinum's. So that would be a safe bet.
 
post #3 of 3 (permalink) Old 12-31-05, 01:01 PM
CJB
Guest
 
Posts: n/a
Re: 4.0 Spark Plug Recommendation


"JimV" <jv9999@yahoo.com> wrote in message
news:EtadnTXzJuzEUCveRVn-sg@comcast.com...
> Clay wrote:
>> '94 Mazda B4000 with 4.0 engine.
>> Which spark plugs are the best for this engine and why?
>>

> It came with Autolite platinum's. So that would be a safe bet.


I can tell you my experience. I bought Bosch Platinum +4's and put in my 92
4.0 Ranger back when I had it. The truck then had something around 90k
miles. Then I was single and couldn't care less about the cost of the
parts; I just wanted the best. It ran ok on the +4's, but not very smooth.

About 20k miles later, I replaced the +4's with Autolite double platinums
and there was an immediate improvement. The truck never really ran right
with the Bosch's in it. A friend who was both a Ranger owner and pro
mechanic (he's worked for both Chevy and Ford dealers) told me that the 4.0
Rangers just seemed to run better on the Autolite APP's. He was absolutely
right.

If you're getting them, I think you need the double platinums. IIRC, some
of the plugs receive a positive charge from the coil pack, some receive a
negative charge. This influences the direction of the spark across the gap.
In the factory plugs, some have the platinum on the center electrode, some
have it on the ground electrode. You'll either need to get Motorcraft plugs
identical to the originals and install them in the exact same cylinders as
the originals, or you can get the Autolite APP's.

That's just anecdotal, I know. Hope it helps some.

CJB


 
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Fordforums Community > USENET NewsGroups > alt.trucks.ford
Gear in this thread - Powered by O'Reilly Auto Parts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome