j_ting_318

Hey guys, I have just recently installed my racing beat street header back exhaust. I took a pic of the exhaust ports and sent it to a friend. They were very white, and he said that it may be running lean, which is weird for a rotary right?

I expected the car to backfire and shoot flames with the new header back exhaust on there, but I get nothing.

How can I tell if its running lean? I dont have a wideband that I can use. My first thoughts are fuel pump, fuel filter, fuel injectors. What do you guys suggest to check?
Thanks!
Jessica

ported13b

what year/ model?

j_ting_318

1987 NA, GLX I believe

ported13b

ok do you have any tools? like a fuel pressure tester, volt meter, or anything to check the vehicle with?

j_ting_318

EDIT: See below. it's weird because recently I've been getting really GREAT gas mielage, which doesn't quite make sense...

j_ting_318

Edit:
I have a voltmeter, I have access to all basic tools, but not a fuel pressure tester.

Are you thinking I should try and see how much voltage the pump and injectors are putting out?

-Gamah

iTrader: (1)

Running lean means using less fuel than would be desirable per combustion. It sacrifices some power, but increases efficiency. I'm not sure if it's true on rotaries, but on 2 strokes running lean can also cause a helluva lot of damage.

j_ting_318

Right, and thats exactly what im afraid of. Id just like to have some advice on how I should go about fixing this problem

-Gamah

iTrader: (1)

Have you tried adjusting the mixture screws on the carb? Someone else will have to give you the specifics, I've only had my 7 for about 3 weeks, and haven't yet bothered with any engine stuff.

j_ting_318

Its not carbed, its a fuel injected 13b

-Gamah

iTrader: (1)

Thus further proving how little I know about 7s. I'd say for sure it is running lean, though. So instead of focusing your research on that, look into how to enrich the mixture.

j_ting_318

Well im sure the ecu would control the mixture depending on what the 02 and the maf reads. However, instead of increasing the mixture, i need to figure out why the mixture is running lean, which is not how its supposed to run stock.

Anyone with any experience want to chime in?

greyseason

i did a quick search on the forum and i found thishope this helps, always love to help a lady

j_ting_318

thanks, much appreciated! let's hope this works lol

RotaryRocket88

iTrader: (7)

No need for multiple threads on this. Thread in the 2nd gen section here: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/help-girl-out-lean-condition-949528/.