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White Pony · Posted: Wed May 24, 2006 2:40 pm Post subject: Spark Plug Wires/coils...

My car is missing terribly now, and it seems every time it gets wet out going up hills becomes a "little engine that could" episode. I need to replace the spark plug wires (among other things like the fuel filter) but I want some input before I buy... The plug wires are obviously original so I know those are a big part of the problem.

My 924 will see little or no track time but I am performance minded and I would like anything I buy to be an improvement over OEM parts, if at all possible, for reasonable money. I have new NGK R plugs...

Shoud I find the "better" set ( the red fyrebrayd or something off of Paragon) or just go with the cheapest one? And do I need a new ignition coil?

Thanks in advance again for helping me keep my daily driver on the road!
_________________
1987 Porsche 924S
White/black (The White Pony)

For sale, $1000
http://www.924board.org/viewtopic.php?p=173801#173801

Paul · Posted: Sun Jun 11, 2006 1:09 pm Post subject:

I would suggest a compression check and a vacuum check.

If both are normal and if your ignition related parts (cap/rotor/spark plugs/spark plug wires) are old replace them. Also if you don't know when the fuel filter was replaced, replace it.

If this doesn't solve the problem, please post again.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

baddad1 · Joined: 27 Apr 2003 Posts: 72

Paul -

I've noticed a considerable amout of black soot in the tailpipe. Which in my novice knowledge means car is running rich. I've searched the boards and came up with possible O2 sensor. Is this the only thing I should be looking at ? There is no appearant black exhaust smoke.

Paul · Posted: Mon Jun 12, 2006 9:30 am Post subject:

Check your fuel pressure, or if you have the means and if the parts are original, replace the fuel pressure regulator, the fuel damper, and the O2 sensor.

If that doesn't do it, check the temp sensors and the AFM for correct operation. If everything is new or working within specs the A/F mixture can be adjusted at the AFM.

BTW if an aftermarket chip was installed, some of these tend to run rich.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

baddad1 · Joined: 27 Apr 2003 Posts: 72

Thanks Paul -

All three will be on order in the morning. May need to call upon your 29 (+) years experience and ask "how to" with the A/F mixture setting.

Paul · Posted: Mon Jun 12, 2006 12:53 pm Post subject:

There's a lot good info at:

www.clarks-garage.com

Here's info about the O2 sensor:

http://www.clarks-garage.com/shop-manual/fuel-18.htm
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

baddad1 · Joined: 27 Apr 2003 Posts: 72

Thanks Paul -

Some good reading for all...

baddad1 · Joined: 27 Apr 2003 Posts: 72

http://www.connact.com/~kgross/FAQ/944faq12.html

http://www.scirocco.org/tech/misc/afgauge/af.html