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Old 09-24-2000, 09:11 PM   #1
DLC
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Post new plugs

I installed a set of Denso plugs over the weekend. The plugs i replaced were NGKs with plenty of miles on them. One of them had oil around the porcelain and a bit in the wires. They were all very black and charred but otherwise undamaged.

The new plugs haven't made much of a difference as i'm still getting a miss when it's warm. When my Magnecors get here and i replace the TPS we'll see what it's like then.

Other than the injectors being clogged, what else could cause a miss like this?
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Old 09-24-2000, 10:52 PM   #2
Ben
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Hi Dave, how much does those plug cost ??
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Old 09-25-2000, 03:02 AM   #3
Shik
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Dave, it's too bad you didn't tell me you were changing your plugs, I have an extra set of NGK BKR7E-11's (one step colder). Oh well.

Get those ancient plug wires replaced and then check things out as you mentioned
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Old 09-25-2000, 08:05 AM   #4
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I think the plugs were $1.50 each at AutoZone.

I'm still waiting on my Magenecor wires through a group buy i and a few other guys (30+) are involved in. I'm hoping for them pretty soon.

I'm going to call a local salvage yard and see what they'd charge for a TPS, if they know what it is :B
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Old 09-25-2000, 08:12 AM   #5
Ben
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Hi Shik, whats the different for standard plug and colder plug, isn't the colder plug is good for our turbo engine??
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Old 09-25-2000, 08:32 AM   #6
Jason
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Have you replaced the fuel filter yet?
I just changed spark plugs (15Kmi old) and fuel filter, and engine oil, boy what a difference it made.

The engine was not misfiring before, but felt a bit weak at low rpm. Now, it is much stronger then before.

Since the oil change and 15Kmi spark plug are unlikely to make much great difference, i will say fuel filter contribute this "gain".
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Old 09-25-2000, 10:04 AM   #7
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I haven't yet, and to be honest i hadn't given it much thought.

I don't even know where it's at!
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Old 09-25-2000, 04:07 PM   #8
Shik
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Dave, you didn't change the fuel filter yet!? It's right near the left front shock tower and will have two bent tubes coming from it(one for the fuel to go in, one for the fuel to go out). The two hoses are probably held on with little hose clamps. Just crimp the hoses off and undo the hoses from the filter, take the filter out of it's holder and put the new one in and reconnect everything. If you look in your service manual, it may tell you to disconnect the fuel pump and start the car till it stalls so there is no pressurized fuel in the lines. That is the biggest waste of time I have ever heard of. Just crimp the lines( half the time I don't even do that) and keep them pointed away from your eyes.

Ben, a colder plug will absorb more heat from the combustion chamber, thus lowering the chances of detonation. If you run too cold of a plug, on short runs, they will not get up to their "self cleaning" temperature and can foul out, but the NGK "7's" will work fine for every day driving. I've had no problems with them at all.
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Old 09-25-2000, 11:27 PM   #9
Ben
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Shik, thanks for your reply, but will thoes "7" plugs could use in daily driving and rally race too????
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Old 09-26-2000, 03:12 AM   #10
Shik
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Absolutely. The plugs are only one step colder then the originals for the Legacy ( they use BKR6E-11 plugs from the factory), so you will not get any bad effects such as fouling, because they aren't THAT much colder.

But because they are slightly colder then the originals, they will offer slightly better protection against detonation so they would be perfect for the TSD rallys you do, especially if you start raising your boost psi. Hope this helps.
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