Question about 1998 Chevrolet Blazer

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1998 Blazer LT 4.3 L V6 No power to fuel pump relay on the relay trigger circuit at any time. Power is there for the fuel pump power circuit if the power was there to trigger the relay New fuel pump installed

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Is the fuse good is the oil full the fuel pump wires run under the drivers carpet is the carpet worn ive seen more than once a hole in the carpet and the wires cut from the heal of peoples shoes

Posted on Oct 14, 2010

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Posted on Jan 02, 2017

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I dont know why its not pumping gas 1998 ford explorer 4x4 4.0 liter v6


The relay is under the hood in the power dist. box, the cut off switch is located in the side panel in the rear cargo area

Mar 18, 2015 | 1998 Ford Explorer

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Have a chev blazer 4.3 THROTTLE BODY V6 ,HAVE 2 SPRAY STARTING FLUID IN BREATHER & starts & runs all day,no problems . Shut off & in 5 min wont start again, unless u spray it 4 2 seconds again? Whats...


Maybe a problem in the fuel pump circuit. Check fuel pressure with engine off, and key turned to on, not start. If no pressure, diagnose the pump circuit at the fuel pump relay. One terminal for the relay would be the power feed for the pump. The engine computer signals the relay on for 2 seconds with key on to prime the system, also signals during engine cranking.

Feb 23, 2015 | Cars & Trucks

1 Answer

1998 chevy blazer fuel pump wont shut off how do


I don't think you can on that vehicle-probably not a code, anyway. Check the fuel pump relay, it may be stuck on. Should be located in the power distribution box under hood. Pull it out-pump should stop-swap in a different relay to test. If pump still runs on with new relay, the wiring to the relay needs checked.

Sep 10, 2013 | 1998 Chevrolet Blazer

2 Answers

What shuts off power to fuel pump when key is turned off on a 94 GMCwith 350 engine


Power is fed to the pump by a fuel pump relay. The relay is powered by a fuse but is triggered by the computer. So when you turn the key on, the computer triggers the relay, the relay closes and turns on the fuel pump. Power is cut off only when the key is shut off and the computer kills the trigger signal to the relay

Mar 08, 2013 | GMC Sierra 1500 Cars & Trucks

1 Answer

1998 s-10 blazer, 240,000 mi now, fuel pump was replaced a long time ago. no fuel pressure at intake manifold. is there a electrical check like a fuse, already swapped relay with another 1. thanks, Tim


try testing the power in and out to the relay take out the relay and check what you have going on there if you got nothing you got other issues if you do have power at the relay then your pump is probly shot.

Oct 15, 2010 | 1997 Chevrolet Blazer

1 Answer

Firing order for 1998 chevy blazer 4.3L motor the number 5 is miss firing


For the 1998 Chevy Blazer 4.3L V6:

Firing Order:
1-6-5-4-3-2

Cylinders:
......(back)......
|..6..|.......|..5..|
|..4..|.......|..3..|
|..2..|.......|..1..|
......(front)

Distributor Connections:
...........(back)
Coil-> o
6-----> o.......o <-----5
4-----> o.......o <-----1
2-----> o.......o <-----3
...........(front)

Let me now if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

Apr 15, 2010 | 1998 Chevrolet Blazer

2 Answers

No power at fuel pump


Your fuel pump relay is triggered by your oil pressure switch,try jumping across to bypass your fuel pump relay if truck runs then figure out why relay is not being triggered.

Aug 24, 2009 | 1997 Chevrolet Blazer

1 Answer

My 98 dakota wont fire


Check your Automatic Shutdown Relay in your fuse and relay box under the hood by the battery. The power supplied to the fuel pump, ignition coil, fuel injectors,  and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD); the idea is to shut off fuel pressure and the ignition systems when the key is turned off to prevent fires, dieseling, and other problems.
The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module.  This causes the engine to shut down.

The logic module monitors the relay driver.  If it senses that the relay driver is not responding correctly it will trigger a code. If the logic module does not sense an absence of current when the circuit is open, or 12 volts DC when the circuit is closed, it knows that the circuit is open or shorted, and triggers code 42. Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start. Good luck and hope this helps lead you in the right direction. Hint: The ASD can be triggered by a broken wire or short in another place, e.g. the fuel pump. 

Jul 04, 2009 | 1998 Dodge Dakota

1 Answer

Fuel pump will not engage


I have found in these the pins in the fuse block under the hood get weak and the relay itself will show a "heat mark" on the fuse block cover if you look at it from the inside, I have had to run new wire to pump , install a outside relay , and trigger from vcm, power to 30 pin from battery, no problems, this is a manufaturing flaw, the circuit to the pump is supposed to be shared with the oil pressure switch circuit.

Dec 17, 2008 | 1998 Chevrolet Blazer

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