How does the TP sensor on a Jeep Wrangler work?
The sensor works on a system of input and output voltages that tell the Jeep’s computer where the throttle blades are at all times. An improperly adjusted TPS will cause the Jeep to run poorly because the computer cannot properly compensate for the air and fuel being fed into the engine.
What should TP reading be on Jeep Wrangler?
Divide the output voltage reading by the input voltage reading. The result should be between .825 and .835 (.830 is optimum). If yours is not in this range, adjust the TPS by loosening the Torx head retaining screws and turning the TPS slightly then repeat the test until it falls into this range.
When did the cap and rotor ignition system come out on Jeep Wranglers?
All on their own or combined will make for better performance. During the early years of the Jeep TJ Wranglers, which ran from 1997-2006, the cap and rotor style ignition system would return. It wouldn’t live long into the 2000s, though.
What can I do with my Jeep Wrangler YJ?
I do repair demonstrations such as how to test various sensors on my Jeep Wrangler YJ. Also included are How to get the check engine light codes, removing a locking gas cap if you lost your key, oil changes, tune-ups, changing sensors, changing clutch, fuel pressure testing and so much more.
Where is the timing scale on a Jeep Wrangler?
Locate the timing scale on the case cover above the crankcase pulley at the engine front end and the notch on the crankcase pulley or vibration dumper, right next to the timing scale. If they are hard to see, clean the scale plate and pulley. Then highlight the marks with white chalk or correction fluid.
How do you change ignition timing on a Jeep Wrangler?
Jeep Wrangler Timing Instructions. You can adjust ignition timing on your Jeep Wrangler by rotating the distributor a few degrees. This procedure is possible on the 4.2L engine model only though. On 2.5L and 4.0L models, the Electronic Control Unit (ECU) controls ignition timing.
When is the best time to timing a Jeep Wrangler?
Timing your Jeep is best after you have driven the vehicle for about 20 minutes to make sure the engine has reached operating temperature. Park the car in a safe place and set the transmission to Park (automatic) or Neutral (manual), apply the “Parking” brakes and turn off the engine.
How to repair a Jeep Wrangler YJ vacuum schematic?
Fig. 6: Emission control vacuum schematic-1992 with 4.0L engine Access our Jeep Wrangler-YJ 1987-1995 Vacuum Diagrams Repair Guide by creating an account or signing into your AutoZone Rewards account. Once you sign in, follow these instructions to access our Repair Guides. Add your vehicle in Manage My Vehicles.