96 sc300, have anyone used NGK laser patinum spark plugs (BKR6EP-11)? I'm having misfiring cyliner 4,5,6. I don't have EGR valve nor EGR modulator. Idel is very bad on 700rpm under.. can anyone help me?

 

I dont see that listed for our car. I see the BKR5EP-11 but not the 6. Did you check the gap and did you just change your plugs, a plug may be bad

 

When you go +/- 1 from the number thats just going with colder or hotter plugs. I forget exactly which is which but I guess he wanted to try and run colder? or maybe hotter plugs.

sc300Super: uummm Check continuity of the wire. Also check the cap and rotor of the distributore. It may have gone bad already.

Good luck.

 

I changed new wires, new plugs, checked coil. I haven't checked crank angle sensor, checked fuel inject electric wiries. My car is sc300, 5sp, I checked all air hoses, it looks fine. Anything you can think of?

thanks

 

Check the wire order.

 

The cap and rotor buddy. Make sure those pins are good.

Heres a picture... FYI, not SC. I just pulled it out from google to make a point. +1 with 24boosted. Maybe you crossed the firing order of the wires as well so check that too.

 

yes, i did and they are in right order. Anything you can think of please let me know.

thanks

 

My local Lex dealer will diagnose ANY problem in 1 hour and chsarge me the flat rate for the info. Good deal for me and they seel the parts also. Call around to the Lex dealers in your area.


John

 

What code are you popping?

 

Are you throwing a code?

If the car was running fine prior to doing this then either those plugs are incorrect (guessing they are pre-gapped so that counts out gapping issues) or else you messed something up on your install.

Pull the new parts off and start over.

Jonny

 

did you use the factory 2j cap or the truck cap.

 

If you installed the plugs yourself check the lines to the throttle body and if the wires are plugged into the correct plugs.