I think I may be running lean? Help a girl out?
 

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

what year/ model?

1987 NA, GLX I believe

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

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

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?

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.

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

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.

Its not carbed, its a fuel injected 13b

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.

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?

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

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

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/.