spahn1

Yesterday i bought a 1984 Rx7 GS for $500. it runs but i am rebuildint the carb. it is overloading itself and back firing. are there any comon problems with this car that i should now about? this is the first rotary car that i have ever owned and i just dont know nothing about them. Also, did i over pay at all?

Aaron Cake

iTrader: (1)

Your first stop is the 1st gen FAQ:
https://www.rx7club.com/forum/showthread.php?t=782426

It will answer most of the common questions.

Kentetsu

Welcome aboard. It doesn't sound like you overpaid, but probably got a great deal.

A great resource for carb info is www.sterlingmetalworks.com That will answer a lot of your questions and help with the rebuild process.






.

spahn1

a buddy of mine told me that this engine mixes oil and gasoline. he also said that my oil sending module or somthing was out. does the rotary really run on gas/oil mixture?

Thanx for the links, they helped alot.

Aaron Cake

iTrader: (1)

There is a metering oil pump mounted to the passenger side of the front cover that meters a small amount of oil based on throttle position. Two lines connect it to nozzles in the carb.

Your "buddy" would only be able to tell if it is non-functional by performing a flow test. Instructions are in the Haynes/FSM. These pumps almost never fail unless something physical happens to them (ie. cracks, hit with a hammer, etc.).

spahn1

ok, thanks. i will double check that. i have one more question tho that has had me scratching my head. How exactly would firing order work on these engines?

southsidecox

iTrader: (52)

^^^once again,haynes manual,their about $15 at most auto parts stores,has info on every aspect of the car,first time you use it for anything its more than paid for itself

spahn1

ive checked every auto parts store in my area and they have all cancelled the manual.

Dzire

iTrader: (1)

good to see another rx7 in town if you need any help just give me a pm and I'll give you my number you probly need to rebuild the carburetor it's not that hard to do

Gringo Grande

iTrader: (97)

Not certain where Jasper, AL is but if it is near the FL/AL border relative to Pensacola a very knowledgeable rotary guy lives there.

spahn1

jasper is way north of the border to florida it is in Walker county, but it stil may be worth the drive,

spahn1

so i may be running low compression, but not 100% sure yet. i dont have hardly any vacuum pressure so my throttle opener doesnt work. and because of that it wont idle. also, my OMP is compleatly out. still having to mix oil and gas and pour it down the carb to get it to start. once it gets started, it runs strong. it just wont idle.

Speacial thanks to Dzire for driving all the way to jasper to help.
Thanks Hobbie

southsidecox

iTrader: (52)

their on ebay all the time and usually for cheap,you can also post in the 1st gen or wanted section

Kentetsu

Have you tried increasing the idle speed?

Dzire

iTrader: (1)

did a compression check on it last night and it was bad 25 psi on the front rotor and 65 psi on the rear rotor

Kentetsu

Any chance it was flooded when the test was conducted? That will show low readings, even on a good engine.

A good next step might be to pull the exhaust manifold off and visually inspect the apex seals...

spahn1

well i kinda got fed up with the car and sold it for 600 dollars. while i had it, i got it running, removed the rats nest, and drove the hell out of it. got it slide wayz a couple of times, and had fun with it. but, it still needed a new engine. it was running 20lbs of compression on the front rotor and 60 on the back. it was not flooded at the time of the test. i was premixing an ounce to a gallon in the tank. and mixing gas and 20w-50 motor oil to pour down the carb to get it running. it also had a bad OMP. Thanks to Dzire, i was able to buy a second gen Convertible from him for $300. it runs, just needs a fuel pump, radiator, and alternator. after that ill be rollin in another Rex-7.

southsidecox

iTrader: (52)

i pmd you on those parts,now i do have an extra haynes manual for the 2nd gen,also if your ever travelling to bham or my area email me steve