In my quest to regain my "passed inspection" status (i'm running too rich), I've started where most people have said to start: with my spark plugs. I guess fouled spark plugs will cause an engine to run too rich. But...i have no idea how to tell if my spark plug is ok. It looks pretty charred. I managed to snag a pic. Sorry it's so damned big. I just bought a digital camera recently and haven't exactly figured the thing out yet. Thanks for any input you can provide.
PS: I didn't put these in, so I have no idea how long they've been in my engine.
I wouldn't say that plug is fowled, but it definitely alludes to the fact that your running rich. I might look at replacing your fuel pressure regulator, and clean your ICV. Each would cater to your plugs looking like that (if you don't have a lot of mileage on those plugs)
btw, I'm not a fan of Plat +4's etiher. In theory a hotter plug (like a +4) makes sense, but I tried them, and my car wasn't happy. Did some research, and found out that the e36 ignition system is somewhat unique and doesn't benefit from such. e46 cars do, but not the e36. Go buy Bosch Super F 8 LDCR plugs. Oem, and what you need.
The plug doesn't looked fouled, but the electrode on the top right is bend out of position and touching the center insulator. That plus it loks like the center electrode is eroded away. Together, they could cause the plug to misfire.
thanks for the help Jllphan. I'll look into those parts this weekend.
I know what you're saying, Gator, but I think that's just the angle of the picture. All 4 prongs of the spark plug were in tact when i pulled them out and none were touching the center insulator. The center electorde isn't eroded away either. sorry about the bum photography. But thanks for the help.
Originally posted by BImmerN2B+Jul 9 2005, 10:16 AM--><div class='quotetop'>QUOTE(BImmerN2B @ Jul 9 2005, 10:16 AM)</div><div class='quotemain'><!--QuoteBegin-kvadgama@Jul 9 2005, 10:06 AM Bosch Plat 4+???
I've had bad results with these platinum plugs.
Dealer sold me NGK Copper 4+ and am very please with it. ($15 each).
Where did you find the NGK sparkplugs? I tried searching for them but haven't found them anywhere. Do you have a part number for that?
Sorry! No idea what the part number is.
Ijust went to the dealer and asked for NGK's (rather than Bosch), and they gave me NGK 4+ Dealer prince for Bosch OEM's $4, NGK 4+ $15 each).
Guy said these plus are copper core and guranteed to last 100K miles.
I've already done 20K and very happy with the results.
Not sure if these plugs will revolve your problem or not tho.
I installed a set of Bosch 2 platinum plugs and my 1994 325is ran like crap. It had a bad hesitation below 3k rpm then smoothed out. I just replaced them with a standard copper Autolite plug and its never run this smooth until now. Each plug is $1.09 a piece. I was after the NGK's but my local parts store were all out.
__________________ 1994 BMW Mauritus Blue 325is, 214k miles, daily driver
2005 4runner, Sport Edition
1992 Ford Mustang LX 570rwhp
1989 Ford Mustang LX 275hp daily driver
The plugs cant be that old...especialyl since whoever put them in put in Bosch +4's.
My e34 ran exactly the same with the +4's. Honestly I dont think it was worth the money, mroe the peace of mind to buy $6 plugs a piece. Like JLL mentioned, try cleanign your ICV (search FAQ's) and that could help more than enough to pass.
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