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My car won't start I have changed the coil fuel pump fuel pump relay and the Mfi relay I now think its the crank shaft relay but I do not know help me !

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  • Bogdan Odwazny
    Bogdan Odwazny Mar 23, 2013

    Check battery for crank power, go to auto zone.

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Sounds like maybe the main computer is bad. When you cranked the engine there is not any indication that it is firing. If you have changed the fuel pump and coil and it still wont even fire, the computer is most likely the cause. Even if the timming was off you would still get some indication that it was trying to start although it probably would not if the timming was off, but the fact it's not even trying to fire yeah that's my take.

Posted on Mar 23, 2013

  • Tess Watson May 25, 2014

    what about the ignition bypass module

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  • Cars & Trucks Master
  • 959 Answers

Year make and model please , engine size too?

Posted on Mar 23, 2013

  • nsarabi Mar 23, 2013

    1999 Mitsubishi eclipse 2.0 non turbo

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The fuel pump will only run until it gets up to pressure

Posted on Mar 23, 2013

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  • nsarabi Mar 23, 2013

    How can I get it up to pressure

  • Mark Diehm Mar 23, 2013

    You need to check the timing belt. I noticed the engine sounded a little off while cranking. this car has a tining beld as well as a balancer belt . you will need to change both if bad. It has been a while since I wouked on one of thiese models butI thing there is a cover on the passenger side of the engine you can easily remove to check the belt. Some have a plug in the timing cover you can remove an ssee of the timing gear is turning. If you get a HAYNES repair manual you will save a lot of time and money by not throwing money at an unknown problem. good luck.

  • Mark Diehm Mar 23, 2013

    It shuts off when up to pressure and that is what you said it was doing on the video. Sorry for the spelling. I find I can not edit these posts before posting. Mark D. 30 years mechanic and Jack of all Trades...and still running a small shop at home.

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  • Cars & Trucks Master
  • 6,152 Answers

Why you change fuel pump,I would change fuel filter first.you change coil,could be module and tune up.Check battery and connection ,battery should be 12.5V.

Posted on Mar 23, 2013

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Posted on Jan 02, 2017

roniecon

Ronny Bennett Sr.

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SOURCE: 94 concorde

change crank sensor? if so replace control module (ignition module)

Posted on Jul 04, 2009

Ironfist109

Iron

  • 3018 Answers

SOURCE: I have a 2001 vw

  • Hi, I can help.

  • The fuel pump relay is 4th over on the very bottom row of the relay panel under the hood. This can be the pump too. The pump holds pressure and when the back pressure switch fails the car won't start. Or the pump could just be out period. The fuel filter can do this too.

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Posted on Aug 29, 2011

carl

  • 3640 Answers

SOURCE: How do you test the

the best way is to, swap it with another relay ( the same as the fuel pump one) and see if it works.

Posted on Aug 30, 2011

zeronullity

ZeroNullity

  • 71 Answers

SOURCE: chevrolet Tacuma Won't Start ??

First, I suggest you take it to someone who knows what they are doing. You take it to a shop for xyz problem and they charge you for fixing the problem, it should be fixed, period. First thing I always do is pull fault codes if the vehicle is equipped with ECU before servicing or removing the battery. Providing what you provided is true.. it turns fine without hesitation, fuel is getting to engine. Many things can cause it not to start, bad ECU, bad wiring, bad injectors, bad sensors, including air flow sensors like MAF, oil pressure switch. It most likely is electrical. Any car with OBD should give a read out of all the sensors.. with proper equipment. And hopefully contain a stored code of the problem... a computer with a actual OBD connection & software is needed for advanced troubleshooting not hand held units like you find at auto parts stores. I would say your best beat is Air/O2/Oil pressure sensors. A experienced master technician should be able to key in on the problem quickly.

Posted on Nov 16, 2011

redds55

Ricky Peters

  • 2620 Answers

SOURCE: 2002 saturn sl won't start, turn over but won't start

If the engine fires up for a second or two with starting fluid then the fuel pump is weak.I would check the fuel pressure and if its not within the specs then replace the pump and filter.

Posted on Jan 26, 2012

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I hope this helps? Are you missing anything else? Engine cranking you have spark at the plugs and fuel injector pulse? Any applicable trouble codes? Battery has a full charge? See load side of mfi relay, that line with arrow head, with key on, good voltage at upper wire? If so, if you use a jumper wire between proper wire colors, the pump should run.
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I would first,change the spark plugs only if they were in the motor,say three years and 50,000. Not just to fix a misfire
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Wwher is the fuel pump relay fuse located?


there are two fuse locations, under the dash by your left foot, and under the hood behind the passenger side headlight.

Your question is really NOT that easy to answer, there is no stock location for a "fuel pump relay" fuse, the fuel pump is powered by power coming from the MFI relay.

Fuse #1 under the hood supports the MFI relay as do fuses 1 and 12 under the dash. Check all three.

There are reasons a fuel pump won't start that are not related to the fuse... if you check them and determine that the fuses are not blown, with the ignition turned to the on position, try powering the fuel pump test jack, if your fuel pump comes on, it is something else (probably a bad cam/crank sensor)

To power the test jack, run a test wire from the positive terminal of the battery to the connector stuffed down behind the passenger side strut tower between the strut tower and the fire wall. It should be a black connector connected to a single black wire with a BLUE stripe. There will be three connectors bundled together, a black one, a blue one, and a round brown one (the round one is for setting timing and the blue is for setting idle, do NOT mess with them)

When you power the test connector, the fuel pump should come on, regardless of the MFI relay or the fuses... if it does not, you need a new fuel pump.

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