Besides replacing the plugs, what else should be replaced and/or installed for a proper, full blown tune-up?...Also how many stock fuel filters does the FD have? I've only owned the car for a little over a Month and the engine seems to be working great. I get bout 14 mpg in the city and 20 mpg on highway driving. But I would feel better if it got a good tune-up. Oner last thing...what's the gap on the plugs? Thanks.

 

Here's what I would recommend:

1. Change oil/filter
2. Flush coolant
3. Change fuel filter
4. Change spark plugs (they will be gapless. There are some that will work like the HKS plugs and they will come with the proper gap setting)
5. Check spark plug wires, replace if necessary
6. Change O2 sensor
7. Change tranny oil

That should get you going. Good luck!

 

Some good info about spark plugs in the following link:

https://www.rx7club.com/forum/showth...hreadid=109013

 

Mahjik - Good stuff man.

Don't forget changing the rear end diff fluid while you're at it.

 

Maybe this might go along with a FULL blown tune up...

1) Bleed Clutch/change fluid \
2) Bleed Brakes/change fluid / if needed
3) Change Differential Fluid

Jack

 

Great advise!! Thanks guys.

 

Great advise!! Thanks guys.

 

Don't forget the timing belt!

 

rotaries don't have timing belts my friend

 

tranny and diff fluid is always a good way to ~smoothen~ things out

 

What about desludging the engine? I had a juffy-lube guy tell me I needed that once, still haven't done it even though my brother killed his saab by not having them desludge it. Is there anything special about the rotary in regards to desludging? Is it a DIY project?

 

I know.

 

Desludge? WTF is he talking about. Seems like BS to make money on you.
Redline your engine once in a while to clean out the carbon deposits. That's all you need to do.

 

Umm, rotary plugs have no little metal hook thing over the plug. Therefore no gap. Spark plugs are literally plug and play for our engines. See here http://66.216.67.51/product.asp?0=213&1=273&3=409

 

desludging - I think it's a motor oil flush. Such flush fluid is available at auto parts stores, which contains mostly alcohol. I wouldn't recommend it since a quart of you oil mixed with oil flush is kept inside the oil cooler. This can be very bad for your motor. If you really want to flush it, do two oil changes within 100 miles.

The gas filter needs to be replaced every 60K according to Mazda. Spark Plug is every 30k but some folks change it every 15k.

Other fluids (break, tranny, differential, engine oil, coolant) should be changed accordingly.

Don't forget air filter, which is every 30k or earlier. Also, lube the antenna with some lithium grease. Replace the wiper insert as needed. Run a bottle of Techron to clean the injectors. Clean battery contact.

Some ppl change the O2 sensor as maintenance. Given that the price of OEM sensor is pretty steep, I tend to view it as a repair item.

Other than that, inspect your radiator hose (especially the upper should be replaced at 70-80k), belts, brake pads, lights, exhaust heat shields.

 

Good stuff...

 

HA HA.. desludge a rotary. I mean, WHERE for cryin' out loud? No valve cover or valvetrain to sludge up. No lifter valley to hold sludge. No side skirts to hold sludge. Oil pan baffles, maybe?

And try and run that stuff through your turbos. HA! I bet the guy offered to help replace your turbos once you were done, right? Ouch!

 

from ricksrotary.com site:

Change oil
Change oil filter
Change Transmission Fluid
Change Differential Fluids
Replace Air Filter Element
Replace Spark Plugs
Replace Fuel Filter
Replace Distributor Cap
and rotor
Inspect Belts and Hoses
Inspect Exterior Lamps
Inspect Wipers and Refills
Inspect Battery and
Connections
Rotate Tires,set pressure
Inspect Brake
Replace Brake Fluid
Drain and Replace Coolant
Inspect Engine Idle
Pack Wheel Bearings Rear
(If applicable)
Lube Door,Hood,Tailgate
Check throttle sensor
Inpect PCV Valve
Inspect Suspention
InspectA/C Operation if Applicable
Road Test

chris

 

Motorflush's are mostly just really thin oil with lots of detergents. If they were alcohol, running it for even 5 minutes would strip all the oil (and sludge) off of all the internals and ruin things pretty quickly.

From what I've seen, they actually do a really good job on the internals of nasty piston engines. Take a 200,000 mile engine with oil that's thick and black every oil change, then run a motor flush and the next change will look like brand new.

However, I would not run motor flush through turbos and I would not run motor flush through a rotary. That motor flush stuff makes the engine get really, really, hot; and probably doesn't lubricate the rotors very well. But it probably does clean up the oil nozzles.

Toyota dealerships have a machine made by bilstein that they hook up to the engine and it flushes out all the gunk. Plus, I think they do it with the engine turned off.

Also, definitly replace your o2 sensors with every tune-up.