H4gen

Ok so i purchased a 94 Prelude with a jdm 97 H22. The guy i bought it from drove it and then bought a new car, then he let the car sit . I bought it and tried cranking it and it started up but idled rough as hell and when you give it throttle it stumble , grumble and pops out of the intake. I have 3 CEL and they are 3,7 and 41 , MAP Sensor , TPS and o2 sensor . I swapped the MAP sensor with 3 different MAP sensors and i have the same problem and CEL after reseting the ecu. TPS is giving the .5V at closed throttle and 4.5V at WOT , still getting CEL on that to even after resetting the ecu. Car is obviously dumping fuel . I am stumped as of right now and i tried searching on here but i haven't been able to get that to work for a while . Thanks for your time and efforts and stuff .

Aradin

MAP and TPS plugs could be switched. Common mistake. They're identical on OBD1 cars. Try swapping the plugs and see if it changes. O2 sensor code is probably from it fouling from all the fuel.

H4gen

The harness for the MAP sensor isn’t long enough to go to the TPS so I’m pretty sure it’s right because the stuff is where it should be . I swapped the wiring from the TPS to the MAP and I got the same codes and it ran the same way. I appreciate the help!

snobordboy

Vacuum leak somewhere is my guess.