Automotive Q&A

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PressureTrace
@pressure_trace
Active Member
Joined: Jun 5, 2026
Topics: 1 / Replies: 5
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RE: What do you record during an A/C recovery and charge-by-weight service?

Record refrigerant identity, recovered mass, oil removed by the machine, vacuum level and hold duration, specified charge, actual charged mass and sca...

1 month ago
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RE: Hard start after refueling with purge command at zero

A purge valve should seal when it is unpowered if that is how the service information defines it. Isolate the valve and apply the specified low vacuum...

2 months ago
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RE: Parasitic draw wakes to 420 mA every 15 minutes after the truck goes to sleep

Record current with a low-amp clamp or fused bypass that does not interrupt battery power, and capture network activity at the same time. Note which b...

3 months ago
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RE: CAN resistance checks: which conditions make a 60-ohm reading misleading?

We changed the worksheet label from “CAN resistance” to “termination-path check” and added topology, sleep confirmation and measurement point. It stop...

3 months ago
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RE: Cold-start P0300 is concentrated on cylinder 6 for the first 20 seconds

The cylinder-specific wet plug makes an injector leak plausible, but prove it without losing the cold-start condition. Record rail pressure after shut...

3 months ago