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can't hear fuel pump?

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Offline bananajack

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can't hear fuel pump?
« on: May 23, 2019, 04:41:01 PM »
Maybe this is dumb question, I'm pretty beginner when it comes to cars. Picked up a nonrunning 95 sidekick, and I can't hear my fuel pump prime when I turn the key. Is it audible, or because of location is it something I wouldn't be able to hear? It seems inconveniently placed sso I don't really wanna dig in there unless I know I need to replace something.

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Offline fordem

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Re: can't hear fuel pump?
« Reply #1 on: May 23, 2019, 06:04:57 PM »
Let's do this scientifically - connect a fuel pressure gauge and see what the pressure looks like.  Realistically, is hearing the pump run going to tell you why it's not starting?  You may be able to borrow/rent a gauge from your local auto parts store.

Want some troubleshooting ideas - get a can of starter fluid and spray it into the intake whilst someone else cranks the engine - if it runs on the starter fluid you have a fuel system issue, if it doesn't check for  spark - remove a spark plug, reconnect the cable and hold the plug against the cylinder head whilst someone else cranks the engine - see if it sparks at the firing end.   
'98 SQ420 Grand Vitara
'05 JB420 Grand Vitara
'16 APK416 Vitara
'21 A6G415 Jimny

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Offline bananajack

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Re: can't hear fuel pump?
« Reply #2 on: May 24, 2019, 09:34:34 AM »
Yeah that's where i'm at. shooting starter fluid into the intake does produce a running engine. i've never had to diagnose fuel issues before though. i'll look into fuel pressure guage though, thanks for the tip!

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Offline fordem

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Re: can't hear fuel pump?
« Reply #3 on: May 24, 2019, 06:10:47 PM »
So you have a fuel delivery problem ...

Could be an empty tank, a defective pump, no power to the pump, a clogged filter, or injection issues - the reason I'm suggesting a pressure test is you could have a pump that's running but does not deliver the pressure required to inject.

Is this an 8 or 16v engine - throttle body or multi-point injection?  If it's throttle body do NOT wire the injector directly to +12V or ground.
'98 SQ420 Grand Vitara
'05 JB420 Grand Vitara
'16 APK416 Vitara
'21 A6G415 Jimny