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.
1990 Plymouth Voyager LE, 2.5 J, Automatic, A604FACTORY OEM SERVICE PROCEDURE
Fuel System Pressure Release Test
CAUTION:
Fuel pressure must be released before disconnecting any fuel system component. DO NOT allow fuel to flow onto warm engine or any electrical parts. DO NOT allow an open flame in area while testing fuel system components.
- Loosen fuel filler cap to release tank pressure. Disconnect injector wiring harness from engine harness. Connect a jumper wire between terminal No. 1 of appropriate injector harness and engine ground. Refer to Fig 1 to Fig 3 .
- Connect one end of a jumper wire to terminal No. 2 of appropriate injector harness. Touch other end of jumper wire to battery positive terminal for no more than 5 seconds. This releases system pressure. Remove jumper wires.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.