A couple tune-up questions

[Aron]

I want to do a tune-up on the Tona, and I got a couple questions. Here's the skinny on my car: 90 ES T1 auto. Bone stock except manual boost controller, running 10# un-intercooled.

1. Spark plugs - when is it a good idea to go a heat range colder? I'll probably use NGK.

2. Timing - what's a good base timing? I think "stock" is 12* at idle. Good enough?

3. O2 sensor - How big of a pain in the --- is it to get to? I have a slotted socket for O2 sensors, so I'm not worried about getting it off, but is it easy to get to?

That's all I can think of for now. Thanks for the help.

[MiniMopar]

1) Yeah, a range or two colder can only help. I've put AutoLite "63"s in my mostly-stock cars and honestly I've never had an issue with fouling.

2) Good enough.

3) It's really not that bad. I don't have the slotted socket, but I usually take a hammer to the sensor, bust off the body, and put a socket on it. I've always been able to get my breaker bar in there well enough to crack it loose.

[Aron]

Excellent, thanks Russ

[turbovanman²]

NGK Iridiums are awesome plugs, last forever. Get some good wires-Aurora, Magnecore, Taylor, MSD. Dont' forget about the fuel filter and PCV valve.

Use only NTK or OEM oxygen sensors, Bosch and others are crap. I would soak the Ox sensor overnight with penatrating oil, then cut off the wire and use a regular 7/8 socket, they can be very hard to get out. Brake clean off the area when done to remove the oil as it will damage the new sensor.

[Aron]

Cool, thanks for the advice.

[turbovanman²]

I forgot, use some recessed plugs, they will help, especially with no intercooler. I am using NGK BR9ES plugs, just have them get you the Iridium version and you'll be fine.

[Aron]

Ok, will do