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No power to fuel pump or fuel injectors - 1998 Jeep Cherokee

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Check fuse box inside cab and under hood, most likley a bad relay or fuse

Posted on Nov 21, 2013

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Check fuel pressure. Have you replaced the fuel filter on schedule? Verify that the fuel pump is getting power. Power goes through an in-line fuse, then the fuel pump relay or the oil pressure sensor. (The relay bypasses the oil pressure sensor while the engine starts, but fuel pump power goes through the sensor during normal run operation. If you lose oil pressure, the fuel pump is shut off to protect the engine.) On four-cylinder models, the fuse is in the fuse block (E PUMP 10)
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No fuel from my injectors, my fuel pump is not engaging.


Fuel pump power comes from a relay which is usually under the hood but not always, it can also be behind one of the kick panels next to the drivers left foot or passengers right foot. Are you getting power to the injectors as injector power usually comes from a different relay or direct from the ignition switch. The injectors are grounded by the control module so they should have power all the time or when the ignition is turned on. Check out the relays and also check the wiring harness connectors both under the hood and through the firewall. Next, check for the various engine signals to the control unit. If a cranking or cam angle signal is missing, the control unit will disable the injectors and fuel pump.. buy or borrow a copy of the workshop manual (try the local library for this) as most have the procedures and test methods to check for issues..

Dec 07, 2009 | 1990 Chevrolet K1500

1 Answer

My injectors have no power going to them. i just replaced fuel pump and relay. i have fuel going to my 350 tbi but nothing coming out the injectors.it wont start and i have no power at the injector so i...


my injectors have no power ging to them. i just replaced fuel pump and relay. i have fuel going to my 350 tbi but nothing coming out the injectors. it wont start and i have no power at the injector so i dont know if its the ecm or what

Nov 08, 2009 | 1988 Chevrolet K1500

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I have no power to my fuel injectors on 88 saab 900 turbo


There should always be power at the injectors as long as the fuel pump is on. The fuel injection ECU provides a ground to the injectors to turn them on.
You most likely have a bad fuel injection ECU. This is a very common failure on 88,89 and 90 SAABs.

Mar 23, 2009 | 1988 Saab 900

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