- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
the HO is a high output version of the 4.7. the differences are internal, the externals *should* be the same.
to be sure, though, call an auto parts store and ask them if the 4.7 regular and 4.7 HO use the same MAIN SEAL. this sill ensure that the regular 4.7 will fit a 4.7 HO transmission, as the main seal comes between the back of the engine and the front of the transmission.
Hook it up to a code reader via OBDII for specifics. Tecnically, there is no reason to flash your ECM unless you are using another ECM from a parts car...for say a 1989 Chevy. This ECM was used on the 1989 S-10 truck with the 2.5L four cylinder, the ’89 Camaro with the 5.0L HO V8 and the ’89 Corvette with the 5.7L Tuned-Port V8 engine. The only difference (aside from the vehicle wiring harness pin population) was the PROM. The PROM contains the calibration software for the ECM. Another reason would be to bypass a security locked ECM like a 2001 Pontiac GT which was notorious for shutting off the fuel pump if the security chip in the key lost connection through switched power.
all of the codes refer to the MAF/Vaf
HO sensors are are all connected in inlet manifold S / O2 sensors , EVAP system problems ( all in the air /mixture section of the control) it is unusual for all these similar codes to appear and the common cause is the ECM
try replacing the ECM with a known good unit and then see what codes appear
IF you come back with a comment I can give you all the code references and causes but as it is extensive , I will wait to see what an ECM change does
Hello, It is not just a simple answer to your question of fixing tcm and ecm Depending on the issue you with the TCM or ECM you will need all the proper tools and maybe the Mazda software. even if you have all these things, you still need the knowledge on how to use them or you can damage the ECM TCM very easily. If you have an OBD2 scan tool then you can scan the codes and clear them. The light should go out. If it comes back on then scan the codes again and post them here. I will tell you what you need to do. The code will start with a letter then four numbers, like this P0301 or P1611 or something like that. I am here to help, -Tim
could be a ecm issue. if you pulled this code and replaced the coil, most likely it is resistance from the ecm to the coil. its either going to be an expensive fix or a timely fix. you can get a resistor tester and trace wires and find the resistance and replace that or get another ecm and see if that fixes the problem. check the connectors for any corrosion as well
code p0123 refers to Throttle position sensor. accelerator pedal position sensor output high cause ---wiring short---TP/APPsensor and ECM code p0121 refers to the TP sensor APP switchA range /rformance problem code p0135refers to heated oxygen sensor (HO2S) 1 bank 1 heater control - circuit malfunction causes may be fuse---wiring---HO S sensor and ECM Out of all these the commom fault is the position sensor and the oxygen sensor.