Moriarty581
NAXJA Forum User
- Location
- Maine
Where can I find info on specs and how to adjust this little gem?
-
Welcome to the new NAXJA Forum! If your password does not work, please use "Forgot your password?" link on the log-in page. Please feel free to reach out to [email protected] if we can provide any assistance.
adjusting a pre 90 TPS
- Thread starter Moriarty581
- Start date
FSM (factory service manual) describes a good DVM method. I learned it's best to perform that adjustment after a good cleaning and adjustment of the TP (throttle plate). With the IAC fully closed and disabled adjust warm engine TP for about 600-700RPM idle. Reconnect IAC and follow the FSM procedure for your transmission type.
Matthew Currie
NAXJA Member #760
- Location
- Vermont, land of big clay
For an 87-90 4.0:
Test is done with throttle closed, connectors connected, ignition on, engine off. Insert probes through back of connectors to make readings. Use a high impedance meter. Adjust TPS by loosening mounting screws and turning in mount.
For manual connect + probe to terminal A, and - to B. Take a reading, which should be in vicinity of 5 volts but probably lower. Note the reading well. Now move the positive probe to terminal C. The reading should be 16 percent of the previous reading.
For Automatic, use the square, 4-terminal plug. Connect probe + to terminal A, and - to D. Note reading, which should be in vicinity of 5 volts. Now move probe + to terminal B. This reading should be 82 % of the first.
This is a condensation of info from a factory TSB. I suggest you copy it out and keep it handy.
Test is done with throttle closed, connectors connected, ignition on, engine off. Insert probes through back of connectors to make readings. Use a high impedance meter. Adjust TPS by loosening mounting screws and turning in mount.
For manual connect + probe to terminal A, and - to B. Take a reading, which should be in vicinity of 5 volts but probably lower. Note the reading well. Now move the positive probe to terminal C. The reading should be 16 percent of the previous reading.
For Automatic, use the square, 4-terminal plug. Connect probe + to terminal A, and - to D. Note reading, which should be in vicinity of 5 volts. Now move probe + to terminal B. This reading should be 82 % of the first.
This is a condensation of info from a factory TSB. I suggest you copy it out and keep it handy.
