What should I do if the vehicle has sat over a year and never been started?


Asked by Mar 18, 2008 at 03:42 PM about the 1989 Mazda RX-7

Question type: Maintenance & Repair

I was told to spray wd-40 or sae-30 motor oil in the spark plugs. Is that right?

11 Answers

if engine will turn over nothing buy new gas,fuelter,and change oil and filter and collent in raidor.

To Thanh

If engine doesnt turn over, charge battery and change spark plugs and clean the leads? expect alot of smoke to come out after its been there for one year.

Steve Gilbert

Yes alittle bit of oil won't hurt, this way if any of the apex seals are seized this will help get the compression back and it will start alot easier. after it starts you will want to get new plugs, because the oil you put in there will foul them and hell it's been sitting a year.

1 out of 1 people think this is helpful.
Billy Roetman

Pull EGI fuse out. Take out the bottom plugs, put a little bit of tranny fluid in, turn over the motor for barely a second. Continue to do for at least a week until apex seals feel lubed. Then troubleshoot from there if it doesnt start right up. It will smoke a lot, but will clear soon

2 out of 2 people think this is helpful.
Javier Rodriguez

Well,after a long hybernation of your beloved RX7,you should put MYstery Oil up the carburetor if is 12A or if is 13B take the upper intake manifold and add at least 2 shot glasses per port.After that take all spark plugs that way you don 't have resistance due to compression,wait at least a feww days that way the oil does its magic and try to rotate the engine by hand if is possible.If doesn't move ,try a breaker bar very gently moving just a coule inches at a time and adding the mistery oil at the same time..

A Facebook user

definatly change the oil ,fuel filter,check coolant,check for any mice nests in the intake ( more common then you might think) really want to go to town pull the plugs and put a couple ounces of risslone engine treatment in each cyl let it sit for a day. this will loosen up the piston rings from the cyl walls. turn it over with out the plugs installed. then reasemble and go

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Sean Butt

Once you get it started let it heat cycle, or in other words let the car run until the radiator fan comes on, this insures that your cooling system is doing it's job and allows the motor to clear itself out. Seeing as though it is an RX7 it will probably smoke for a little bit, or more so than a car with pistons.

Dev Débie

That's the FC3S right? It's a 13B for sure, the steps above are correct, and you also have to make sure that the engine will not flood when trying to start it again. If you do happen to flood it (meaning too much fuel in the combustion chambers), grab a pair of long needle nose pliers and pinch the fuel line until it starts then release the line, of course thats for 13Bs without the fuel shutoff. Expect a lot of smoke (mostly blue, this is normal) on first startup, run it until it comes to it's normal operation temperature range, then you can shut it off from there.

2 out of 2 people think this is helpful.
Nathan Johnson

For what my 2 sense are worth an RX7 should NEVER not be run for that long. For a normal car it is not a good idea... But for an rotary engine I would be really worried about it. There are several very small and very fragile seals and gaskets that go on the rotor. After a few years I would guess the motor may run for a day, week, or even a month... But I think those seals will fail and than you have no compression and then the motor is dead... I will have to be rebuilt. Also unlike a normal motor that can run for a while when a cylinder or even several of them loose compressoin, a rotary motor will be a giant paperweight real fast once the gaskets and seals fail...

Edgar Bueno

i personally will recommend MMO (marvel Mystery Oil) or SeaFoam if you can get it, seafoam is better but costs a lot more, all you do is squirt a bit through the plug holes, manually spin the engine, repeat about 5-6 times let it sit overnight, repeat 2 times next day and try cranking it..... also check this forum out for all your mechanical needs. rx7club.com

1 out of 1 people think this is helpful.

I have a rx7 with 12a rotary and it has 10k miles on motor but has been sitting for 3 years motor has been rebuilt for about year before it sat what should I do to try to start it

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