Rebuilt Engine, finally starts, smokes and idles terribly

matpdx2300 · 08-20-07, 03:14 PM

I have a '79 rx-7 that I just rebuilt the motor in. I got it to start for the first time last night. My concern is that it smokes a lot. We ran it for about 45 mins. and it continued to smoke a lot. I know it's normal to smoke quite a bit after a fresh rebuild but is it normal to smoke for this long?
Also, I cannot seem to get the mixture right. Is this normal? Am I missing something obvious?
My timing is on, my spark plugs are nice and clean I just am not sure if everything is going the way it's supposed to.
Any help would be greatly appreciated.

This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on RX7Club.com!

Kentetsu · 08-20-07, 03:29 PM

What does the smoke smell like? Oil, fuel, or coolant?

Rogue_Wulff · 08-20-07, 03:32 PM

If the carb is running way too rich, or even trying to flood, you'll never get the engine to idle correctly. It will also cause it to smoke.

matpdx2300 · 08-20-07, 03:38 PM

I can't really tell what the smoke smells like, it smells like a mixture of things. I don't think it really smells like coolant, but it definitely smells some of oil and fuel...

I'll check the carb to see if it's running way to rich.

RXnos1200 · 08-21-07, 03:11 AM

Losing any coolant?

REVHED · 08-21-07, 04:22 AM

Did you machine the end plates? New oil control o-rings?

Latin270 · 08-21-07, 08:12 AM

Quote:

Originally Posted by REVHED

Did you machine the end plates? New oil control o-rings?

Yea, could be one of those pesty water,oil, o-rings. Damn things slip out of place sometimes when re-assembling. Is the smoke white?

matpdx2300 · 08-22-07, 10:27 AM

I don't appear to be losing much coolant but yeah the smoke is white.

My buddy is pretty sure it's the o-rings. Says that if he puts his hand behind the exhaust for a minute it speckles his hand in oil.

Sound like a tear down and re-assemble?

Clearkut · 08-22-07, 10:50 AM

does it just spit condensation or is it for sure oil/coolant, my new rebuild will spit condensation for a bit on thr first start of the day but once its warm it stops, i lose no oil(i premix) or coolant. if its white smoke that disapears right away it may be steam from exhaust condensation, if it stays thick it will likely be coolant, i had one previously that acted like that, it didnt last long or run good ever.