DRBragg

My cars running rich I can smell it bad in the exhaust and I'm only doing 8 mpg I've tryed fuel system cleaner and all the fuel lines are fine (yes I checked) and it doesnt seem to be a problem with my MAF (I just cleaned it) I'm thinking O2 senor but any other thoughts?

cptpain

iTrader: (1)

look at your pulsation damper, i had the same problem; low mileage, smell of gas everywhere, everything LOOKS ok..

but then again... do you have some sort of fuel management?
what are your mods?

My5ABaby

iTrader: (7)

O2 sensor won't cause 8mpg. Have you tried doing a tune-up?

DRBragg

pulsation damper? I've never actually heard of that (sorry a bit new to rotary engines) but no mods as of yet, unless you consider my mufflers being rotted out a mod...

but thanks I'll give the pulsation damper a try

DRBragg

yea but it could cause the richness, I did a small tune up, oil, plugs, wires, coolant flush.

Aaron Cake

iTrader: (1)

How did you clean your AFM?

If there are a lot of miles on the car, have your injectors professionally cleaned. They could be sticking/dripping.

NCross

iTrader: (18)

o2 sensor only reduces MPGs by like 2-4. check your timing, make sure your exhaust isnt clogged up, get a new air filter. get the fuel injectors proffessionally cleaned or just replace them with new ones. does the car bog down at low RPMS or while going up hill? you may want to check out the aux. ports. could a bad air pump or exhaust leak cause low MPGs and rich condition?

Phantomkid

hmm did you check fuel pressure. you can tell alot from this. operating pressure should be about 25 thats with just the engine running also regulated pressure should be about 30 thats when you remove the vacuum hose from the regulater. if you are afraid of a leak easy just keep the pressure tester hooked up and isolate where you thin the leak may be like clamp the return and feed line to see if the dampener is leakng or the injectors. def at least check for operating pressure.

apreludem

i'm actually in the same boat that you are. 9 mpg here so ill keep an eye on this thread. So far i have been told to clean injectors. Change my O2, and of course general tune up.

DRBragg

69k which is not a lot, unless its a lot for a rotary... but I'll talk to the guys at work

DRBragg

ok....how do I check the timing on a rotary? other then the lack of mufflers the exhuast is fine. and what are the aux port cause my car does bog at low RPMs I just thought it was a rotary thing

DRBragg

hopefully some of this helps you, let me know if you come up with anything else

Phantomkid

if the aux ports are stock open you can loss low end power

Rx7TyreBurna

iTrader: (1)

Check your pulsation dampener. Mine looked fine, but then I saw a small leak. It was leaking fuel onto my exhaust manifold. Which could have been bad because I have an exhaust leak on the exhaust manifold... and sometimes I get afterfire (?). I think that is what it is called.... anywho.

It is located sort of behind the alternator. Underneath the intake manifold. Put your finger on it and see if you can feel it pulsing while the car is running. If not, consider getting it taken off and looked at.

It is very very hard to see the leaking fuel. But I was getting about 5 MPG with mine all jacked.

Good luck! If it is the PD, don't drive your car anymore! I had to start taking the bus.... ghetto...