ezer993

Hello everyone
I have 993 c4 1997
What are the best spark plugs for my car
Thanks

quacktoduck

topic has been covered numerously... Please use the search function...

http://www.pcarworkshop.com/index.ph...1994_-_1998%29

http://www.pcarworkshop.com/index.ph...rk_Plug_Change

pp000830

If they have been replace in the last 80k miles or so and you have no OBD Codes related to them I would not replace them. If you are having the valve covers off or the hydraulic lifter cartridges replaced I would add wires and plugs as it is just incremental work.

Mike J

80,000 miles is too long in my opinion - you can have reduction of efficiency without triggering codes. My recommendation is 30-40 thousand miles, usually the plugs i pull at that mileage are starting to show electrode rounding and wear. Rotors/caps can go a bit further, again tempered by inspection. I do not replace plug wires based on mileage but on condition and external factors, like misfires. Wires usually shown heat induced hardening and cracking typically on the lower side of the engine, with wires for example on #6 lower taking a beating due to the tight corner the wires are routed near the plug.

C4inLA

I was reading all the various labels on my car. Amazing the fact I see them for 20 years of ownership and just discovering great content. Like emissions sticker showing vacuum routing and one of the stickers should have factory recommended plugs. Perhaps on door jam?

sand_man

Looking back through the records on my '95, this schedule seems fit the frequency of mine; new plugs every 30,000. I am planning to do them at around 90K when my engine is out for a new clutch. The caps, rotors, and wires were done at 60K.

TJ993

BOSCH FR 5 - Still Preferred ?

kjr914

TJ, I'd just search for "spark plugs" and user name Steve Weiner-Rennsport Systems. The most definitive source we have here on all things 993 engine related.

Also info here:
http://pcarworkshop.com/index.php/99...rk_Plug_Change

TJ993

Thanks Keuth

Just confirming Bosch FR-5 is still Preferrred.>?

I pulled 5 - 11 - the plug I worry about most and she is a nice beige colour after 25000
Planning ahead and wanted to know if the Bosch is still preferred?
TJ

ToSi

I'd give the Denso IK20TT a try. Had a good experience in another car & they'll probably outlast the engine. Happy w/ the IK20 in my 993, the TT version wasn't available at the time.

TJ993

GOOD FOR A NA 3.6 ?
No Turbo here = just saying since plug # says TT
Thanks TJ

ezer993

Thank you all for the replay,i will use fr5 bosch and will replace ignition wire and the distributer caps.the car has 97000 km and i had it for 14 years

ezer993

Also i was looking at VK22 iridum plags,are they any good?