Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN1991JETTA L4-1984CC 2.0L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTSPECIFICATIONS
1991 Volkswagen Jetta L4-1984cc 2.0L DOHC
Powertrain Management: Specifications
1991 Volkswagen Jetta L4-1984cc 2.0L DOHCSECTION Specifications
COLD START VALVE
Resistance between connector terminals 6 to 13 ohms
DIFFERENTIAL PRESSURE REGULATOR
Resistance between connector terminals 15 to 20 ohms
Control current readings
At idle checking value 0 to 5 mA
At idle adjusting value 2.5 ± 2.5 mA
After start enrichment (6 to 9 seconds) 15 to 25 mA
Warm-up enrichment 9 to 15 mA
FUEL PUMP
maximum current draw 8.5 amps
Resistance between connector terminals 6 to 13 ohms
DIFFERENTIAL PRESSURE REGULATOR
Resistance between connector terminals 15 to 20 ohms
Control current readings
At idle checking value 0 to 5 mA
At idle adjusting value 2.5 ± 2.5 mA
After start enrichment (6 to 9 seconds) 15 to 25 mA
Warm-up enrichment 9 to 15 mA
FUEL PUMP
maximum current draw 8.5 amps
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.