Question about 1991 Suzuki Samurai

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1991 suzuki samurai want start

I have a 1991 suzuki samurai it will not start it has fuel pressure and spark but the fuel injector is not pulsing the check engine light on the dash does not illuminate at all

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  • Anonymous Sep 19, 2008

    I also have a 91 samuri. It just shut off, no warning. Injector not putting out fuel. All other functions working. Some blogs indicate the ECM (engine computer) may be bad.

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Check ECM (engine computer) located under glove box. Injector circuit output probably dead. Replace ECM. Go to Searchparts.com for best price.

Posted on Sep 19, 2008

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If you have spark at all the plugs, the crank sensor should be ok. You should use a gage to check fuel pressure? I don't know engine size? For the 3.1L engine, my info says 40--46 psi.
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You will have to pinpoint what the engine is missing...
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All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the engine to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should.

Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

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Need to check to see if the fuel pump makes noise in the gas tank (humming when the key is cycled (aka priming the pump)) or check for fuel pressure at the rail with a fuel pressure gauge. Check if you have injector pulse when trying to start the car (purchase the correct noid light for your GM and see if it lights up when you try to start the car).
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if it runs on starting fluid its a fuel problem.. check fuel pressure even if its a couple of pounds off, the vehicle will not run. but using starting fluid may give you the extra poundage you need to make it run . also check vacuum hose at pressure regulator on fuel rail

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