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Mitsubishi diamante weak spark

Car wont start. It has a weak spark At first we thought it was a fuel pump. It was not getting fuel. Changed fuel pump. Still no fuel. Then thought the gas gauge wasn't working and put gas in. Filled it from 1/4 tank to 1/2 tank. Now it's getting fuel but now the spark is weak. The spark is yellow when I checked it.

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  • Contributor
  • 13 Answers

Cam shaft sensor

Posted on Jan 18, 2013

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6ya6ya
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Posted on Jan 02, 2017

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HellPoolHall
  • 74 Answers

SOURCE: 97 Toyota camry

Check the fuel pressure on the fuel rail on top of the motor. Diesel fuel tends to be "dirtier" than gasoline, and I'd be willing to bet the fuel filter is stopped up.

Posted on Aug 07, 2008

Tech jk
  • 102 Answers

SOURCE: car wont start. turns over but wont catch.

The fuel pumpmay have failed. Try having someone turn the key to the ON position while you listen under the car near the fuel tank for the fuel pumo to hum. If it does not, or it sounds like it is grinding, then it may have failed. A pressure test with a gauge would be need to check for proper pressure.

Posted on Jul 04, 2009

  • 3640 Answers

SOURCE: 2004 impala fuel gauge not working

when you changed the fuel pump, did you bump the sending unit in tank. or a wire to tank may be the problem. maybe sending unit in tank is bad!

Posted on Sep 16, 2009

  • 78 Answers

SOURCE: my 95 s10 blazer w/4.3 vortex wont start again...

it could also be the fuel pressure regulator or fuel filter that is in line or mabey the fuel injection relay i no it will not start if that blows well i hope this help please give a good rating that you

Posted on Jul 08, 2011

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Let me also say that on my 97 pathfinder it ran good up until i replaced the water pump. then it wouldnt start. so i changed the spark plug wires and plugs. same thing...wants to start just wont fire up....


My first thought was the timing belt was not in time since you have to remove the belt to get to the pump.
The crank sensor is near the flywheel so it should not have been touched.
But timing should not affect the spark coming out of the coil.
It could be a problem with the resistor for the coil or something with the computer.
Did you also replace the cap and rotor when you changed the distributor ? Is the spark weak coming out of the coil ?
You may have to get a used shop manual from Ebay to get the test procedures and wiring diagram for the ignition system.

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Changed fuel pump but it wont start


Check for spark, if spark then spray start fluid into throttle body, if it starts check your fuel injectors with a noid light also check crankshaft position sensor. If the pump wont pump check the fuse and connection to the fuel pump for voltage.

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MY 1999 MONTE CARLO WON'T START, ORIGINALLY THOUGHT IT MIGHT HAVE BE THE FUEL PUMP BUT, CHANGED THE FUEL PUMP, AND FUEL FILTER, FUEL RELAYS, AND SPARK PLUGS AND STILL WON'T START


even though , you changed the spark plugs, were you getting any spark before you changed them, if you didn't check for spark, i would check out the coil, for spark, you can do this by removing 1 of the spark plug wires and ground it, then have someone to crank over the engine, to see if spark is present, if no spark, i would check the ignition control module inside the distributor.

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Possible weak spark from ignition coil or low fuel pressure due to weak pump. Try spraying carb clean into intake throttle body when problem is present. If vehicle will start and run with a little spray then fuel pump is failing.

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Car wont start .


You will not be able to hear the fuel pump on that model. First you have to determine if you get fuel and have spark. If it is a fuel problem, replace the DME relay first. Very common. They act up and fail without warning. Part is cheap and located in the fuse box. Next would be the fuel pump.
If it is spark related it may be the Flywheel Reference Sensors. There are two and the cost about $100 each.

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