Just Changed Engine need help with codes.

[ChrisBa]

Hopefully someone can help out here.

2000 Neon auto 2.0

Just took the motor out of a 5spd 2000 Neon and put it into a Automatic 2000 Neon. Now let me list my issues.

1. The car is eating gas like a semi. Ill drive 26 miles and use a little under 1/4 tank.

2. The Speedometer is not working

4. The car will not start with a key/ I have a heavy duty switch under the dash I push with the key on to start until I fix issues. Starter is tested and good from both cars

3. The check engine light is showing

A. PO743 TCC Solenoid Switch
B. PO134 O2 Sensor
C. PO500 Vehicle Speed Sensor
D. P1299 Fuel Air Metering/ Vacum leak??????
E. P1193 Air Intake Temp Sensor

I believe there are 3 sensors(A and C) on the tranny and I'm also thinking the Backup/Neutral safety switch is causing the car to not start. Its hard to believe all 3 are bad. What would cause this? The vehicle itself runs great, it idles perfect. shifts awesome. I love it other than the gas issue. I'm ripping my hair out over this. If anyone needs more info let me know. I hope to fix this car this weekend. Thanks in advance
Chris

[jason-1995fbody]

recheck all your fuses electrical connections and especially the ground cables/straps


one ground cable being off can cause a lot of issues

[mopar_rocks]

You are indeed correct that the neutral safety switch will cause all 3 codes to be thrown. I also have seen a bad connection at the neutral safety switch actually cause the same problem. As stated, check and clean all ground wire connections. When I got my car, the main ground wire was NOT attached. The car was throwing 8 codes. I attached the ground cable where I thought the most likely spot for it would be, of course having the battery undone when doing this cleared the codes, and the car ran without throwing another code and it ran much better!! You did just change engines right?