post#3 car still wont start.

[omarb45]

94 q45. changed out fuel pump opened fpcu no damage jumpered pump.replaced relay in trunk.cant get pump to run,quiet as a church mouse.fuses under dash look good.car ran fine,then did slight hesitation pulling off from stop sign.no other problems,then 2 days later no start.help have 2 small ones that go to school 20 miles apart now down to one car.I need a miracle help!!!!!!!

[omarb45]

everyone that post about no start,well almost everyone say they can here humming from pump.One member sprayed starting fluid in intake.another pulled injecter fuse,another pulled fuel pump fuse and thter cars started.another pulled his alarm fuse n put it back and bingo started.Mine is different no sound at all.Dont know where to look next.Only (one) member offered assistance where are all the know it alls at?Hell Im open for flaming about deferred maintence!need real time help.The one infinity dealer here basicly brushed me off saying it would be a couple weeks before I could get in there.dont trush any shops here because,it took them 3 days to do altanator and somehow he said I lost 2 pounds worth of freon.tried opening fsm but it reads like russian old dell computer.I need to know what systems are in fuel system to fire up car.Could it be anti-theft acting up?eccs-relay,crankangle?.How do you know if main computer is shot?Got lucky with #8 injector maybe I shouldve bout that lotto ticket after all.

[Q451990]

Even if you have to go on eBay and buy a printed FSM - or get one from a member here if there's one for sale. That and a multimeter will help you diagnose what's going on with your fuel system.

If you have a shop specializing in Z cars, those fuel systems are very similar.

Heath

[omarb45]

I never noticed my security light blink when you take key out.only when you lock it from what I remember is when it came on.Now it blinks soon as key is removed even before locking car.If security is on wouldnt it kill the starter?Newark infinity is supposed to have a master tech call but not holding my breath.oh one more thing now when I turn key to on just when lights come on I can hear a click in the back of the car as well as usuall one in front but never heard one in back.kind metalic sounding.

[Q451990]

You have too many threads going... I can't keep up with all of them! Did you try finding an identical relay elsewhere in the car and swapping them?

Heath

[omarb45]

Bought a new one. Really couldnt find another like it on car.But before I replaced it.I couldnt hear anything from back,now atleast I hear a click.

[goody90q45]

It sounds like a bit of self-diagnosis would go a long way in us helping you Omar.

Fuel........Spark......Compression

Fuel (Pressure)- If you don't have the tee and gauge to measure fuel pressure then unhook the outlet hose from the fuel filter and feed it into a soda bottle. Does a steady flow of fuel come out when you crank the engine? Chances are good that you have adequate fuel pressure to start the engine.

Spark- You've changed the plugs so you know how to get the ornamental covers off to get to the coils and plugs. Pull off a coil, plug in one of the old plugs, and ground the tip close to the engine. Got spark when you crank the engine? Chances are there's nothing wrong with the ECU or electrical system.

Compression- Pull a plug, screw in a pressure gauge and crank the engine. Got 140+ psi? Chances are good all the other cylinders are fine.

The GF didn't flood the engine by chance? Have you tried holding the pedal to the floor for up to a minute while you crank the engine? This procedure clears excess fuel out of the cylinders.

Help us help you. Check at least the fuel pressure and the spark and let us know what you find.