faye x7

Perhaps I could have searched for this, but right now I'm a bit lazy..so sorry. heh

Here's the deal, last night..I goto start the baby up choke out and she's warming up just fine. Anyway....I have the hood up too cuz I'm hearing this weird whistle noise...it was dark so I wasn't able to check it out really..and right now....it's dark again cuz I slept all damn day. (oops) Anyway...I'm looking around and the car is still warming up and I see the headers are a bright orangish...reddish color and I'm thinking great...cats clogged? I look under and see my cats aren't quite the bright red as the header is. (header=stock exhaust manifold)

So...what do you guys think? Time for an RB exhaust? ...and what would that whistle noise be?

faye x7

I'm a n00b! *bump*

plzkthx

MIKE-P-28

iTrader: (1)

You got a stopped up cat, or you are running incredibly rich, whats it like w/o the choke on?

85RX7GS

iTrader: (1)

How does it drive?

faye x7

I notice when it warms up/choke out the exhaust smells like gas...so..that's rich..right? I forgot to mention that when the choke goes in and the car idles just fine about 800 rpms and there is no glowing. I drove her from my brother's g/f's house which is a few miles and there were no problems and I opened the hood up after I got home and there was no glowing...so..yeah.

MIKE-P-28

iTrader: (1)

Then its probally normal, if it does it under choked conditions only.. Id say its just really rich like that, go figure thats what the choke is for anyways LOL

851stgen12a

soiunds like you need to push the choke in a bit. De3finetly running to rich onder choke...
When I start it in the morning I pull the choke all the way till it starts and push it all the way in. Then I hold the motor at around 2g's for about 3 minutes... idels fine most of the time.....

85RX7GS

iTrader: (1)

When I start my car up in the winter, I adjust the choke so it runs around 1500rpms and it runs great with the choke. In the summer, I let it run at 2000rpms with the choke out. It doesn't want to do that in the winter though.

syklone

hold it.

I thought that everyone agrees that lean=hot, rich=cool. That is my understanding. Am I wrong? If I'm not then you could be running extreamly LEAN, not rich, but I don't know why that would be.... call me a dummy.

faye x7

I remember reading a thread where someone said lean is hot and rich is cool....but now that someone says I'm running rich and that's why my header is glowing...i'm confused...what's up?

error402

-Error402

ASEmaster

Did you ever find the whistling noise? When I had a vacuum leak, you could hear a very high-pitched whistle at idle to low throttle (that's when you have the highest manifold vacuum). It leaned everything at so bad at lower RPM's that my header turned cherry red.

But if yours is running fine, I'd have to agree w/ everyone else, you're just running a little rich under choke.

Metallic_rock

you are running rich... the fuel is still burning when it gets into the header, that's why it is turing orange... I had the same problem, but that was cause I didn't have the timing right.

Just don't pull your choke out quite as far. Easy fix.

faye x7

I think my timing is off too...the guy who had the car before I did, he hadn't seemed to take good care of it. It was cheap and it did seem to run well and there was virtually no rust. So I picked it up for $500

I never have adjusted timing on a car before...jebus I'm a noon to anything mechanical, though I know I can do it. I learn quick..I just never got into cars and what not.

Thanks for the info guys.

moremazda

iTrader: (4)

If in "everyone" you mean all people with any type of a sceince degree, then yes.

There seems to be a very popular miss-conception in this first gen section as to what happens when you are running rich or lean.

Syklone is correct, a mixture considered to be "lean" will burn hotter than a mixture considered to be "rich".

faye x7

Oki..well, I'm lost. So...I'm running lean then? haha...boy this is fun.

i_piss_on_hondas

Your running rich My choke got stuck after I 1st get my car and had to get to work... by the time I got there my headers were GLOWING BIG TIME... RED HOT... I cought the grass infront of atkins on fire

(the)mouse

Ok, before you guys start fighting... A lean mixture DOES burn hotter than a rich mixture. On the otherhand, very rich mixtures create a higher EGT (exhaust gas temperature) because the burn rate slows to the point that it's still burning well past 30* ATDC. At this point energy is left in the form of heat rather than transfered into mechanical energy. If you retard the timing the effect is compounded significantly.

So are the people with science degrees going to agree?