Have a customer that has a 89 rx-7 (non turbo)

CHeck engine light was on retrieved codes
11 (engine thermosensor
12 18...TPS codes
changed both the tps and thermosensor
cleared codes...still has MIL light on and code 11

checked the sensor...and the voltage from the ECM (as well as continuity)... to the sensor...about 5 volts from the ECM (referance voltage)

Any suggestions other than replacing the ECM?

the car acts like it has a bad accelorator pump

(if you guys still remember what those are)

starving for fuel with quick depression of the throtle
and runs fine with a slow increase of throttle ..up to about 3,500 rpm...then acts like its shutting down the fuel...
any suggestions ...most welcome

 

bumpity

 

lol, i thought i accidently got back in the 1st gen section when i saw accelerator pump. sounds like the floats are stuck. just thunk on top with a rubber mallet.

sorry i have nothing but a bump for you.

 

When the car is warmed up, what is the reading at the ECU? In volts. I only have a series four, but the same sensor is used in it as yours. A fully warmed up car gives me generally 0.5 volts.

 

If it's still hitting a brick wall past 3,500rpm, I doubt it's the thermosensor you speak of (located on the back of the TB if I remember right) I don't believe it plays that big a deal. Did you adjust the new TPS properly when you replaced it? Perhaps it's way out of spec and that's what running into the wall is doing for you. As far as the thermosensor, I hate those damn things, but do as hailers said.

 

is it bouncing off of 3500rpms like its a rev limiter?
if so its a bad pressure sensor (but that doesnt sound like the problem) my turboII did this with the pressure sensor unplugged but my 91 doesnt..

water thermo sensor isnt the problem. that will only make the car run right when the water temperature is under 80 degrees celcius, which probably isnt a problem for you. (you were talking about the WATER thermo sensor right? if not i'm an idiot)

it looks like your TPS codes went away when you changed the TPS and reset the ECU...

 

Sure sounds like what happens when the OMP fails, but I would think you'd get a code for it.

#11 is the Intake Air Thermo Sensor on the engine, for clarification.

 

ok that makes a little more sense now.

yes, infact it does sound like what happens when the omp fails. sounds like safe mode to me.

on the other hand, i left the intake air thermo sensor unplugged on my s4 turboII one time and it fucked with my head royally. so many random things happened. (i think 3500rpms thing was among those)

 

that sensor is right where the dynamic chamber meets the VDI manifold on the firewall side, mines slid off before, if it isnt on, the sensor plug on the manifold itself kinda looks like a standard 2 prong electrical plug that u use when u plug in a lamp

 

Again, I doubt the air thermo intake sensor is going to cause hesitation like that, I'm willing to bet the TPS wasn't adjusted properly when it was put on.

 

I hope he posts back so we know what it was. I guess so many of these type threads are left conclusionless because it's so easy to just move on once you've solved the problem. This forum gets so much action that stuff gets buried pretty quickly too.

 

You'd be right in that statement, you usually have to wait until another problem arrises when they state the golden line, "You might remember my earlier problem of blah blah blah, well I fixed that and now, yada yada yada"

 

Hey this is the only mildly informative thing that came across google when I got code 11 off my 1991 NA. It's the only code apparently but the check engine light does come on while driving. But my symptoms are different. The engine will rev up fine for the most part but it runs a little rough. I'm not sure if the concept of misfiring can be applied to a rotary engine or if there's technically a different word for it but that's what it feels like it's doing to me. When it gets warmed up it does this less. When I first start the car she idles high to about 2500 rpm and this is very rough seeming to me and it concerns me every time. The car shakes when it does this because of how rough it is, but it only last like 15 seconds then it will fall back down to 1000 rpm where it sits at idle only wavering slightly. Once the car has warmed up enough for the temperature gauge to read it runs pretty good and stutters only at higher rpm. I've replaced the spark plugs and the fuel filter and run fuel injector cleaner through the gas. I assume this code has something to do with it since it's the only code that flashes through for me. I was hoping since this thread is almost old enough to vote now maybe someone has more wisdom for me?

 

I am also having the same issue any help?

 

I believe that the fact that when it is first turned on it revs high is just a cold start feature that was done for emissions sake. Technically that in-and-of itself is what it's supposed to do but I blip the throttle each time to make it stop. It's not good for the engine and is programmed in for emissions sake I'm pretty sure. The misfiring I haven't solved. I've been deep in the trenches of suspension, bushing, a mount replacements for the last year and haven't been dealing with the engine since I can't even drive it right now.