I think I hurt my rx7. i turned it on and didnt let it warm up. I reved it really high and took off(i know that was really dumb, i thought the same thing, but I was showing the car to a friend). A few minutes later the car is having trouble ideling. It normally ideals between 1000-1200rpms, now its almost turning off and sits around 800rpms. Engine is shaking now. It also now lags(stutters) when driving between 2000 and 3000 rpms, especially in fifth gear. I got a little black smoke coming out the back now and it smells like gas/oil. I think I broke the seals. Any thoughts?

Stock 93 Rx7
45000 original miles

 

vaccum reading when at idle? is the smoking constant?
and yes... not a great move.

 

Check the vacuum line that goes to the map sensor on the firewall. It's like the easiest thing to check before you start worrying about seals. When the map sensor vacuum line pops off it makes the car run like garbage.

 

I dont have a vacuum gauge, but will get one tomorrow. thanks for the tip. The smoke is consistent, but its not a lot of smoke. its a little dark in color. I remember in my second gen I brew the seals and was burning oil, that was white and was much worse.

 

yeah, sounds like you're running rich... that normally suggests the map sensor... you need a boost gauge anyway.

 

Haha. Sweet move.

 

>>yeah, sounds like you're running rich... that normally suggests the map sensor... you >>need a boost gauge anyway.

I figured that i was running rich. i go thru gas like water and the exhaust is covered in black sut.

 

Did you check the MAP sensor like someone said?

This could be the answer to your problem. If not, compression check should def be next.

 

Who cares. It's going to warm up eventually.

 

THANKS D4rw1n.

THAT WAS IT. THE HOSE THAT CONNECTS TO THE MAP SENSOR WAS DISCONNECTED. THANKS. I PLAN ON REPLACING THE OLD VACUUM HOSES.

 

dumbass don't ever do that again

 

..map sensor. I remember that one..car puffed llike crazy. Found out it came unplugged during sparkplug install and later finding out I had to simply replug..it stopped puffing crazily and idled fine. Why can't all fixes be that easy for FDs? haha.

 

 

gotta love that map sensor...put a tie wrap when you replace the hose...

 

LOL, good ol' map sensor. I remember when the vac hose popped off of mine. Scared the crap out of me. I thought I had ruined my car. Live and learn!

 

Next time for your friends, rev it to 8 grand and hold there for 5 min while everyone smiles

 

shouldn't even be reving it that high and taking off boosting when just start up.

 

good 'ol map sensor. We all go through this don't we?
anyways, I think your idle is some what high? It might be better to set your idle at 850 rpm - 900 rpm.

 

lol...

makes me want to ask...

what if it WEREN'T the MAP sensor..

same symptoms he described...

chipped seal?

Loss of power is usually a tall-tale sign of lost compression, no? I've read about the whole shaking needle too.

That would suck.

 

now hes going to tell everybody how you blew your seals burning out and none of them will ever buy an rx7, oh well just more hondas on the road to own.

 

What he said

 

Don't you still have the factory double throttle? that shouldnt allow you to rev it quickly when the car is cold. Mazda was trying to save the car from guys like you

 

my friend popped off that hose at the drag strip and he was sure the motor was blown when i re-connected the hose for him he looked like he just witness a miracle.

 

After 9 months it kinda loses its jab.

Dave

 

how did you get map hose unplugged during a spark plug install