this just started today,i drive my car every weekend...

As title says im running really rich accordin to my aem afr gauge when i gas it at low rpm it runs really rich soundin like a subaru
almost sound like a spark plug is out
i dont really wanna punch it cuz of how rich is running but it will raise to redline if i did it doesnt get stuck at any rpm....

*i compression test back and front rotor its well over 90
*both coil packs are working fine......i took each spark plug out and clean them down real good they look lil burnt but nothin major at all


motor was rebuilt about yr ago


MY car Mod are
aeromotive fpr at 42 when every thing was fine i was hittin 11.7afr on top boost 9lbs
rebuilt turbo bnr stage 1
n370 chip wit rtek 1.7 which has larger 720 secondary injectors
hks bov
straight pipe corksport
godspeed radaitor

every thing else is stock


pleasee helpp need my baby back on track

 

Your FPR is set at 42 PSI?

It needs to be set at ~28.6 PSI or so... Even with your mods.

 

i think the guy above me is probably right, though i don't know much about tuning, too high fuel pressure = running rich in theory

 

it only hits 42 at top boost any thing lower would have me running leann



wen at idle my fpr is at like 26 28 the vaccumm controlls that

 

i dont know bro, i never owned a turbo so i dont know much about tuning, im sure someone can help you out wish i could.

 

one thing that you could possibly check is the throttle position sensor, that controls how much gas the ecu thinks the engine needs, just a guess at something that it could be causing you to run rich, because if its not working it will tell the ecu to send the wrong amount of gas and as a failsafe i would THINK it would tell it to give more gas than is needed, as well if its out of adjustment, but it would also cause alot backfiring on decel , i had this problem on my na before and it was the connectors on the tps to the harness, they were all corroded and causing a bad connection, a friend helped diagnose it and we replaced it with a new connector from a good tps wire/connector and cut off the old one and put the new one in its place, ran normal after

 

Tps is fine and don't find any vaccum leaks

 

Probably just going to have to go over and check as many things as you can, im not that great with technical things on rx7s, but there are many things that could factor into the car running wrong.

Have you checked your spark plugs and wires ? If the plugs are fouled out (all black on ends); youll want to replace them or at least clean the ends off with a wire brush if you cant afford new plugs , and if the wires have blue stuff on the connectors youll want to clean that stuff off or replace them depending on how bad it is and if you can afford to get new ones.

I always get ngk spark plugs and wires, its pretty much the best standard stuff to get for your ignition.

Another thing to check that could help is your grounds, clean them off and redo them, i dont know if that could cause the problem, but it wouldn't hurt.

As far as other things that could be causing you to run rich im not really sure. Bad fuel pressure regulator (not sure if that would cause you to run lean or rich). --- actually nevermind the fuel pressure regulator , i saw you have an aeromotive one, so i wouldnt think you should have a problem with that

 

Have you checked for error codes?

 

I'd replace the plugs rather then clean them. My car sat for 2 weeks while I worked on it and out of nowhere when I went to start it the plugs were bad, ran fine when I last drove it. Took me ages to find, I cleaned them and no difference, new plugs and all was well. If it sound's like a subaru that means it's on 1 rotor.

 

^+1

If you can't find what's wrong with it, and nothing will fix it, there's a good chance he's right. I bought a car running on 1 rotor , it would run, but you'd have to control the idle by foot, sometimes it would idle but barely, and acceleration was **** poor as well as making it backfire alot (since half the gas is obviously not being burnt because half the engine has no compression)

Hopefully you don't have it running on one rotor, hopefully its something else that's easy to fix.

 

no error codes were found

when i clean the plugs the subaru sound went away but still was hesitating n chokin u

its idleing really rich now


went from 14.7 to 12.1afr

i also lowered my fpr to 40 which didnt do anything

 

im changing plugs...wiress.. and o2 sensor as well today to see what happens

all grounds were check all seem good i even retightin all of them


motor was compression tested yesterday and back n front reads fine still

 

goodluck bro, may the rotary gods help you get this one back to his true form

 

car drivin smoother but now wen fully warm wont keep its idle

 

do another compression test, a proper one this time measuring each face.

 

If it sounds like a subaru fuel is not been burned the right way so it has to be ignition related or compression,do the correct compression check.

 

He's gettin all the subaru owners jealous lol

 

each face of both back and front rotor gives a even bang

 

We want numbers though.

90 or less = ready to go at any moment

90-100 - getting weak

100-110 - decent

110+ - ideal

A cheaply rebuilt engine will yield lower compression than a higher quality rebuild, you really want to have 100+ compression on each rotor face, but ideally 110+

 

Were there any recent changes to your engine which could have precipitated this problem such as what was the last thing you worked on that was engine related?

You could try disconnecting the TPS and in addition to unplugging the vacuum hose to the Boost Sensor and drive the car to see if it runs appreciably better or not.

When in doubt grab a copy of the FSM ECU pinouts and go through each one relevant to the operation of the engine and take measurements w/key to on and also w/the engine running and see how it compares to the numbers provided in the manual.

 

Rear rotor 100 fron rotorr rigght below 100

 

well think I found my problem. I switch my bov wit a friend my car idle normal again and running. Smooth again

 

Good stuff bro, glad to hear its running normal again. 100 psi isn't a bad number, I'd worried if it were 90 or lower

 

Dam nice numbers bro!nice 2 hear that the car is running good!