Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
|
SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
|
|
|
#1
11-03-2007, 01:10 AM
|
||||
|
||||
|
weird test with spark plugs
if i use a bosch platinum 2, my svx has barely any misfire
if i use a bosch platinum plus 2, it has extreme misfire i did this test within 10 minuts of eachother on 1 cylinder, the bosh platinum was best, is that because of the better fit without those washers on it?? http://static.summitracing.com/globa...bch-4301_w.jpg btw, had 2 spark plugs with bosch platinum plus 2,and the other 4 with the plain platinum 2, 1 cylinder had a misfire with a plus 2 plug, but i switched it with just a plain platinum 2 without the washers and it ran good.... 
|
|
#2
11-03-2007, 01:19 AM
|
|||
|
|||
|
your prob is w/ the plug... bosch
put the correct ngk in there and avoid the gimmicks
__________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin blk 92' LSL w/ average mods pics here http://s306.photobucket.com/albums/nn277/yourconfused/ Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."
|
|
#3
11-03-2007, 01:28 AM
|
||||
|
||||
|
ok, well thats great news concidering i didnt want to buy a new coil, but what is by far the best plug for the svx??
|
|
#4
11-03-2007, 07:30 AM
|
||||
|
||||
|
I have Bosch Platinum 2s and they run fine.
__________________
bLAh
|
|
#5
11-03-2007, 10:57 AM
|
||||
|
||||
|
you say you have bosch platinum 2's, well are they the plus 2 or just 2?? you using the ones i put a photo up of?
|
|
#6
11-03-2007, 11:00 AM
|
||||
|
||||
|
Platinum +2. They were $5 each.
__________________
bLAh
|
|
#7
11-03-2007, 12:46 PM
|
||||
|
||||
|
I just did a search and you have 4 different threads about the same problem with coil/sparkplugs/misfiring. It makes it very difficult to try to help you when the clues are spread out all over. Please try to keep it to one thread so that we can easily see all of the information and what troubleshooting has been done already.
__________________
Matt Locker Link 2015 BRZ Limited 6MT 92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting 92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles 19 Subaru Ascent Premium - -Hers !. 89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P.
|
|
#8
11-03-2007, 01:01 PM
|
||||
|
||||
|
when i baught the car it had 4 plugs that were the +2, and the other two were platinum 2.
it has misfiring and backfiring, i cant figure out what it is, 2 months later while it is misfiring i get a CEL, saying cylinder 2 misfire i pull the plug on cyl. 2, put a new one in... no change, i reset the ecu i then switched the cyl. 2 coil with cyl.1 coil, hardley any change, yet NO CEL i put all new bosch +2 in, runs even worse i took out the new +2 plug from cyl.1 (cyl. with the supected bad coil), and changed it with a old platinum 2, not the +2 now it runs like before i changed all the plugs the engine died on me while i was driving, oil lights flashed, dont know if these problems are related... i can definatly tell when its running on all 6 cyl. and only 5, when it doesnt misfire it will instantly get up and go, it will shift at 6500 rpm, but if it feels like its sluggish it will only shift at 4500 rpm at WOT and have the power of a NA legacy..... i hope i have give some better details.... Last edited by cruisen_15; 11-03-2007 at 01:04 PM.
|
|
#9
11-03-2007, 01:28 PM
|
||||
|
||||
|
If I am reading that correctly it means the misfire did not follow the suspected bad coil from cylinder 2 to cylinder 1. This would mean there is nothing wrong with the coil.
If the coil is not causing the misfire you have to move on. Try pulling the plug on the fuel injector on the misfiring cylinder while it is running and misfiring. See if there is any change as you unplug it and plug it back in a few times.
__________________
Matt Locker Link 2015 BRZ Limited 6MT 92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting 92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles 19 Subaru Ascent Premium - -Hers !. 89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P.
|
|
#10
11-03-2007, 01:55 PM
|
||||
|
||||
|
but right now i dont know what cylinder is misfiring, i still dont understand how it acts weird when i change the plug with the suspected bad coil......
|
|
#11
11-03-2007, 02:40 PM
|
||||
|
||||
|
So we are back to not knowing if it is the coil or not.
Forget about the plugs for a minute. To tell what cylinder is misfiring you need to have the car running. While it is running and misfiring go to each cylinder and one at a time unplug the fuel injector, listen for changes in how the engine is running, and plug it back in. When you find a cylinder where unplugging the injector does not change the running of the engine you have found the cylinder with the misfire. The good cylinders should cause the engine to almost die when you unplug them. The bad cylinder you will hear little or no change in running when you unplug it. Once you identify which cylinder is misfiring you need to identify what is causing the misfire. Is it the fire or the fuel. To find if it is the ignition, you swap coils between the suspect cylinder and a good cylinder and then go through the unplugging of fuel injector clips again. If the misfire follows the coil to the new cylinder then it is the coil. If the misfire stays with the cylinder and does not follow the coil swap then it is the sparkplug or the fuel in that cylinder. If testing does not show it is the coil you need to swap fuel injectors between cylinders and again test for where the misfire moves to. Read through this thread starting at post#20. He went through avery similar problem and they used a great troubleshooting technique to find the answer. http://www.subaru-svx.net/forum/show...r+firing+order
__________________
Matt Locker Link 2015 BRZ Limited 6MT 92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting 92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles 19 Subaru Ascent Premium - -Hers !. 89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P. Last edited by immortal_suby; 11-03-2007 at 02:43 PM.
|
 |
|
|
Hybrid Mode
