FCJoe

Well, I thought I had my car running great but i guess i was wrong. I replaced the pressure sensor and it was running great, no problems, and very minor hesitation if any. NOW, shes barely wanting to idle, will go through the rpms sometimes and wants to die when the throttle is to the floor. I tried unplugging the TPS when warm, nothing. I was getting codes, found a dangling vacuum line and put it in its place, reset the ECU, now no check engine light. Anyways, heres the video to explain what im talking about:

http://s250.photobucket.com/albums/g...t=100_1201.flv

http://s250.photobucket.com/albums/g...t=100_1202.flv

Sorry the videos are dark and yes I know about the belt and the shitty exhaust. Also, its stalling when under load. You can see in the video that its going through the rpms but then sometimes its not, I think towards the end of one of the videos i had the throttle to the floor and its wanting to die. So, any help anyone? I'm pretty much stumped.

FCJoe

Car is a 91 N/A

Hazard15301

iTrader: (5)

Maybe your cats are partially clogged.

FCJoe

Yeah I tried that, call it ghetto but tried drilling some pretty big holes in the cat. No difference at all, maybe a little bit if anything.

FCJoe

Any help anyone?

FCJoe

Now the car won't start, or if it does it will only start for a few seconds then dies. I'm getting codes 18 (Throttle Sensor, Narrow Range), 13 (Pressure Sensor, Intake Manifold Pressure), and 12 (Throttle Sensor, Full Range). Code 13 doesn't make sense as I just replaced the pressure sensor and it was running fine, now its not. Codes 18 and 12 would be the TPS, correct? Would that really effect start up?

Vdub2002

which pressure sensor did you replace??

to me it sounds like its laboring at idle as well, unplugged tps will throw the code so you caused that one. Where did you get the pressure sensor (im going to assume its intake man pressure)? If you have the old one i'd throw that in and make sure its not a faulty press sens. of course this advice isnt from someone who knows rotorys, im learning too, but diagnosing i do know.

And most cars, you can unplug the TPS and it would go into a pre mapped mode, where the ECM/ECU would run on a basic tps mapping (correct me if im wrong, thats how its been afaik). Im not sure if mazda would have the premapping.