Jump to content

A quick tale of junk bosch plugs


bmw_e30
 Share

Recommended Posts

did a "tuneup" a few weeks ago with new plugs/cap/rotor/fuel filter/coil but didn't set the dwell or check the valves as both are pretty spot on still.

 

turned car and after all parts installed and ran a bit rough and bogged down at anything past 4k but i thought i was imagining things. drove the car a few days ago and bogging down/ahrd starting/rough running all still there.

 

checked the entire fuel system first from back to front all looked clean so i knew the junk russian made bosch wr7dc+ plugs were the next step. i pulled my last plugs and installed them which are ngk bp6 about 8 years old with 10k miles on them problem solved right away

 

moral of story always use the highest quality japanese parts in your 2002 it will run like a toyota/honda/mazda but drive like a bmw :)

Edited by bmw_e30
  • Haha 1
Link to comment
Share on other sites

It also might be a letter in the part number-

 

wr7dc+ looks like it has a resistor in it.

ngk bp6 does not.   

 

If you have resistor wires, a resistor rotor, a blue coil, a ballast resistor,

or any particularly high- impedance combination of the above,

you'll get high- speed blowout and misfires at high speed.

 

I'm not defending the Botch plugs- the generation that broke off

in the head cured me of any need to run them.

 

And NGK has apparently discontinued the non- resistor -

It should also be a bp6es, 'extended tip' plug...

 

t

plugless.

  • Like 2
Link to comment
Share on other sites

On 8/24/2022 at 11:57 AM, Son of Marty said:

In no way am I defending Bosch and their off shore junk, but did you gap the plugs before installing them?

 

i did gap them to .032 when i installed them but when I measured them today they were closer to .028 that explains partly why they were sucking since my car likes them at around .032

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Upcoming Events

×
×
  • Create New...