Missfire solved

[ians13]

Well after battling this missfire all week it's finaly solved, after doing a vacume leak test testing o2 sensor, maf, cps signal, coil check wire check, turns out it was #6 spark plug broken at the tip, the only reason i did not check the spark plugs to begain with was they are new platinum toyota spark plugs installed a 2 months ago, that goes to show never assume or rule any thing out untill tested,

I found this broken plug when trying to dry the cylinders out after I flooded the motor doing a high pressure injector cleaning.
needless to say i was happy to find this broken plug because plugs are cheap compared to most other things on this car.

within 2 weeks i have replaced
Radiator $152
New Fan Shroud $82
Upper Radiator hose $10
Termostat 180 degres $9.00
Heater Hose $8.00
New AC Compressor $120
Dryer $20.00
Climate control $25
New Fan Clutch $54
one spark plug $5.00

 

[Yellow 13]

Now to find what caused the broken plug...

 

[mrnickleye]

Probably got cracked upon installation. Happened to me once on another car. Drove the car a month, no problems, then all of a sudden, while cruisin' down the freeway, BAM, the ceramic blew out, and compression leaked right by what was left.

Had to drive 10 miles like that to find a parts store.

Maybe it was cracked right outa the box?? Since then, I always look plugs over real close before installing. And I try to be real careful installing them.

Any question, I just use another one.

 

[chriso]

Oh, yeah, it took me about a week after startup of a full rebuild to find the culprit of my misfiring. I had two, yes, that's right TWO bad Bosch Platinum's that were brand new and went in during my rebuild. I would have never guessed but it took a while to figure that one out, oh and a lot of bad words were spoken also.

 

[ians13]

Over looking the spark plug is so easy to do but when you do find it your like wow i could have had this fixed a week ago.

 

[suprastanger507mgte]

Now to find what caused the broken plug...

I vote for you to dump that signature. After looking at it "accidently" . lol hahahaaha :
I was not able to read the posts..All I could see was yellow/blue stuff on my pC screen... :aigo: :aigo: :aigo: