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Zeke's Avatar
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 32,072
Why it pays to check/read your plugs (long)

On the early MFI and carbed cars anyway.

When I got this old heap, it hadn't run in years. So, when it started up after the prep work, I was delighted, to say the least. Well, that was a couple of months ago, and I've been sorting out things since.

The first thing I noticed was that it was gassing up the oil, so I thought I was in for a pump rebuild. Tyson said, "Drive it and drive it hard, just keep an eye on the oil." I did and changed it a couple times in a week. The pump seems to have resealed itself well enough that I can put off the rebuild for now.

So, I'm still tuning and sorting along and decide to read the plugs again. When I got it, the plugs were brown on one side and sooty on the other. I've run it around a bit and thought I'd check and see how those new plugs were doing. Five nice tannish ones and........what's this?.........a whitish one. Hmmmmmmm. So, I need to investigate. I start with the obvious, the injector. And I find that the hard fuel line to the injector moves a bit. Didn't notice that before. I separate the line from the injector and the injector is loose in the head about a half a turn.

I cleaned the injector with Berrymans and filled it up with some more Berrymans and resinstalled it. Snugged up the hard line and another step to a smoother engine.

The moral: Just curious poking around uncovers troubles by accident. Gotta keep an eye out for aberrations on the unknown car.

It'll be a long time before the thing gets paint. But, while I'm dealing with the rust and mechanicals, I sneak it out now and then for some exercise. It gets better with each run.

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Old 01-06-2004, 07:13 PM
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campbellcj's Avatar
Join Date: Aug 1999
Location: Agoura, CA
Posts: 5,753
Great tip Milt. I remember not too long ago I was very lucky to discover a cracked injector on my previous 914 (2.0/four D-Jet) prior to leaving for a drive. It had been running perfectly up until then but the injector finally let go. At 30psi a substantial amount of fuel pressure is excerted on those suckers, and of course the leakage is right above the exhaust system!

We can't take -anything- for granted on these 30+ year old jewels as they get older and more precious. Check often, and check twice...

Chris C.
1973 914 "R" (914-6) | track toy
2009 911 Turbo 6-speed (997.1TT) | street weapon
2001 F150 Supercrew 4x4 | tow vehicle

Last edited by campbellcj; 01-06-2004 at 10:04 PM..
Old 01-06-2004, 10:00 PM
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