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Why doesn't my 91 MR2 5sfe have any spark?

I changed the ignition coil, igniter, distributor cap and rotor, an coolant temp sensor. Still has fuel.

Posted by Anonymous on

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  • Toyota Master
  • 4,977 Answers

You need to check the computer for codes this may help you know were to start to diagnose the problem. this sounds like your just throwing parts at the problem hoping it will fix it.

Posted on Apr 11, 2015

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

GM Elec
  • 1000 Answers

SOURCE: 94 olds hard starts when warm, starts when cold and runs rich

If you can get a fuel pressure gauge, check and see if the pressure is 16 to 24 lbs after the engine has warmed up.
I would connect the pressure gauge when the engine is cold, make sure it does not leak or touch anything hot, place the gauge between the hood and the windshield and drive the vehicle until it is at the temperature you feel it "starts hard". Shut the engine off and try to repeat the no start or hard start and make sure the pressure is correct.
Also, when you shut the engine off, watch the pressure and make sure it holds and does not drop to (0 LBS) of pressure.
One last question, has the fuel filter been changed in the past 30K.
Let me know.
Regards,

Posted on May 08, 2009

frcs68
  • 1605 Answers

SOURCE: Distributor wont spark

check the fuseble link.
you can measure it, and make sure the contact are clean and secured.
the other thing is the check the ignition switch, make sure you have 12v going to the switch.
check thermo switch on top of the block.

Posted on May 21, 2009

peterrance19
  • 399 Answers

SOURCE: Just changed distributor cap and rotor, plugs and

check the gaps on plugs also distributor also condensor in distributor

Posted on Nov 14, 2009

  • 6 Answers

SOURCE: Not starting. No spark. Crank angle sensor?

you my also have a selenoid problem,may sit on passenger side fenderwall.

Posted on Mar 13, 2010

emissionwiz
  • 75108 Answers

SOURCE: 1992 GEO Storm Crank normal

Do you have voltage to the positive post of the ignition coil with the ignition key turned to run? You do not mention that you have done any testing for system fault codes either, this is a very important test.

Posted on Jan 31, 2011

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1 Answer

Why my 94 Astro van will not fire


this generation of gm vehicles is easy to troubleshoot. the engine needs 3 things to run: compression, fuel, and spark. since you mention fire, i assume you have no spark.

disconnect any random spark plug wire and connect the end to a hei spark tester. crank engine and observe for spark. if you have no spark, disconnect the center terminal of the distributor cap and use the hei tester in the same manner. spark means cap and rotor bad or bad plug wireset. no spark means make more checks.

check for battery voltage and good ground on distributor. check for open or shorted ignition module or ignition coil windings. if power and ground is present and ignition coil tests ok, check for ignition pulses at coil primary. if you have no ignition pulses feeding the coil, change the distributor.

with that generation of vehicle, the ignition system will operate without help from the computer. don't even troubleshoot the guts of the distributor, if you change the cap, rotor, and anything else, it will be the same price as a remanufactured distributor, and might not fix the problem. if you troubleshoot a low volrage related issue (no pulses, shorted or open circuit, unstable timing, etc), change the whole thing.

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2003 trailblazer 5.3 no fire change cam & crank sensor


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1989 chevy 2500. started it up in driveway it died wouldnt start. changed ignition module drove it to town died wouldnt start again. got a diognostic tester which read throttle positioning sensor changed...


I WOULD CHECK IGNITION FUSE TO SEE IF POWER GOING TO COILS AND IGNITION MODULE. REPLACE DISTRIBUTOR CAP AND ROTOR.HAVE IGNITION TIMING CHECK.DISTRIBUTOR CAN SLOWLY WORK A LOOSE JUST A LITTLE TO THROW OFF IGNITION TIMING SO PLUGS WONT GET NO SPARK.

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I have a 93 grand cherokee lerado with the 5.2 engine. the first thing to happen is the ignition coil went all of a sudden while driving. replaced the coil and ran great for two weeks then it started to...


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My 98 exployer is misfiring on all 6 cycdeers but runs fine after warmed up


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Priority Action Part Type Cause 1 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s). 2 Inspect Distributor Cap Loose, Burned or Cracked Distributor Cap. 3 Inspect Distributor Cap and Rotor Kit Loose, Burned or Cracked Distributor Cap and Rotor. 6 Inspect Spark Plug Fouled, Damaged, Broken, or Incorrectly Gapped Spark Plug(s). 7 Inspect Coil - Ignition Faulty Ignition Coil. 8 Inspect Condenser-Ignition Faulty Condenser-Ignition. 9 Inspect Point Set Burned, Worn or Incorrectly Set Ignition Points. 15 Inspect Timing Specification Incorrect Ignition Timing. 19 Inspect Fuel Injector Dirty or Worn Fuel Injectors. 21 Inspect Intake Manifold Gasket Leaking, Worn, or Damaged Intake Manifold Gasket. 22 Inspect Distributor Worn, Damaged or Faulty Distributor. 24 Inspect Valve Burned, Worn, or Sticking Exhaust Valves.

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assuming you the coil, plugs, cap, rotor and wires are good. check the cam sensor, If you have 12 volts to the coil using a 12v light tester. The cam sensor responsible for sending info to the computer telling it that the cam is turning, then the computer tell the coil to dispurse the charge/sparks to the distributor as distributor distribute the sparks to each plugs from the rotor of the distributor. Replace the cam sensor, it tend to go bad over period of time.

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