Question about 1993 Acura Legend

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1990 Acura Legend, location of main relay for fuel pump

I have intermittent starting problems. I have replaced spark plugs, plug wires, alternator, distributor, igniter, and fuel pump. Factory owner's manuel does not show location of main relay for fuel pump. Please, where is it??? Thanks! John

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Looked it up online, looks like its in the underhood fuse box but couldn't get a good diagram that shows which relay number it is. the website i use is sort of dependent on the manufacturer, apparently acura did not feel like sharing that info. hope that helps

Posted on Jun 17, 2009

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The main relay is underneath the dash by the fuse box but up a little higher. I am having. the same problem.Let me know what you find if you are able to solve it. lorenapatterson@myway.com

Posted on Nov 06, 2011

  • lorena patterson Nov 06, 2011

    The main relay is underneath the dash by the fuse box but up a little higher. I am having. the same problem.Let me know what you find if you are able to solve it. lorenapatterson@myway.com

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How do i get to the main fuel pump relay on a 1990 acura legend

Posted on May 12, 2011

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If relay does not fix problem check cam sensor and crank sensor

Posted on Jun 17, 2009

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How do I test the igniter on 1996 corolla 4afe motor


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MAKE, MODEL, YEAR, PLEASE!!!!
Not only that, we need to know what's happening or not happening.

With what little you've given us, here are the possibilities.

Battery, battery wires, battery clamps, alternator, alternator fuse, regulator, starter, seized engine, lifters, crankshaft, camshaft, timing belt, timing chain, spark plugs, plug wires, distributor, fuel, fuel filter, fuel pump, fuel pump fuse, fuel injectors, fuel injector fuse, fuel injector relay, wrong key, key chip, key chip reading system, ignition switch, ignition switch relays, ignition switch fuses, multiple computers, in wrong gear, clutch not pressed, and I'm sure I missed a dozen more.

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My 1989 Cadillac Brougham 307 starts up and pulls off but doesn't go more than 15 miles or so...replaced ignition coil and alternator, wire, spark plugs.Could it be my fuel pump is bad..?


There is another ignition module in your distributor that should have been changed when you were doing tune up. Try that first, then you can check fuel pressure to see if pump OK.
Another problem with these cars, was the catalytic converter plugging up.
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Missing problem requires to check the following systems and components:
1. Fuel system. (Fuel pump, fuel filter, fuel injectors).
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3. Air leakage in the intake manifold.
4. Detached vacuum hose.
5. PCV Valve.
6. Servo brake booster pipe or diaphragm.
7. Valve clearance.
8. Cylinder compression.
9. Contaminated fuel.
10 . ECM.

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You already took #1 off the list.
The national auto parts chains (AutoZone, Pep Boys, and Advance Auto Parts) will hook up a
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Priority Action Part Type Cause
1 Inspect Battery Battery Discharged or Faulty.
2 Inspect Battery Cable Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Fuel Filter Clogged or Dirty Fuel Filter.
4 Inspect Distributor Cap Distributor Cap Cracked or Burned contacts.
5 Inspect Coil - Ignition Faulty Ignition Coil.
6 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter Starter Motor Faulty.
9 Inspect Fuel Pump Low Fuel Pressure.
10 Inspect Solenoid Switch Faulty Starter Solenoid Switch.
11 Inspect Relay - Fuel Pump Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Motor Faulty Starter Motor.
15 Inspect Fuel Injector Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer Incorrect Operating Information Being Delivered and Sent From The ECC.
18 Inspect Fuel Tank Fuel Tank Empty.
19 Inspect Carburetor Carburetor Flooded or Faulty Choke.
20 Inspect Distributor Worn, Loose, or Incorrectly Installed Distributor.
21 Inspect Distributor Rotor Burned Distributor Rotor contact

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