Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

B - Test Drive

B - TEST DRIVE

1. Perform test drive lasting at least 40 minutes following these guidelines:

^ Drive vehicle on city streets at speeds below 45 MPH.

^ Air conditioning and fan speed on max.

^ Accelerate at very light throttle keeping shift points below 3000 RPM. After 20 minutes stop vehicle in a parking lot, M/T in neutral and A/T in drive for one minute, and monitor engine RPM using the DATALOGGER PID.

^ At the 40 minute mark, stop the vehicle in a parking lot, M/T in neutral and A/T in drive for one minute, and monitor engine RPM using the DATALOGGER PID.

^ Safely accelerate the vehicle at wide open throttle (M/T shift at 8000 RPM) to the legal speed limit.

2. Did you experience any of the following during the test drive?

^ The vehicle has a lack of power

^ The RPM PID drops to below 700 RPM during the one minute stops.

- YES - Engine replacement required, complete ENGINE DIAGNOSTIC WORKSHEET (LACK OF POWER) and refer to PARTS INFORMATION section for engine ordering process.

- NO - Proceed to C - ENGINE VACUUM VOLTAGE TEST.