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1995 mazda, stumbles upon acceleration


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gahumble
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Apr 13, 2012, 9:36 PM

Post #1 of 8 (1166 views)
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  post locked   1995 mazda, stumbles upon acceleration  

i have a 1995 mazda 626 2.5L, 5sdp. it hesitates/stumbles upon acceleration until 1600 - 2000 rpm then runs ok. replaced plugs, dist cap, rotor appears ok. wires resitance under 11k ohms/3ft. new fuel pump/strainer/filter. 2 stage injector service(manifold and fuel additive) also tried a known working MAF meter. any ideas?


Discretesignals
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Apr 13, 2012, 10:57 PM

Post #2 of 8 (1117 views)
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  post locked   Re: 1995 mazda, stumbles upon acceleration [In reply to]  

Check engine light on? You try a coil output test. Good coil should be able to produce a spark that jumps 3/4 of an inch.





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gahumble
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Apr 14, 2012, 11:06 AM

Post #3 of 8 (1079 views)
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  post locked   Re: 1995 mazda, stumbles upon acceleration [In reply to]  

no eng. light, will ck coil. thank you


gahumble
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Apr 15, 2012, 4:12 PM

Post #4 of 8 (1041 views)
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  post locked   Re: 1995 mazda, stumbles upon acceleration [In reply to]  

it has an integral coil ?


Hammer Time
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Apr 15, 2012, 4:15 PM

Post #5 of 8 (1037 views)
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  post locked   Re: 1995 mazda, stumbles upon acceleration [In reply to]  


Quote
t has an integral coil


That makes it harder to get to but it can still fail. In this case you would have to test at the end of the plug wire.




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Discretesignals
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Apr 15, 2012, 4:50 PM

Post #6 of 8 (1028 views)
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  post locked   Re: 1995 mazda, stumbles upon acceleration [In reply to]  

Pull the distributor cap off and you'll see the coil lead. Take a 12 volt test lamp connected to battery ground. Hold the probe of the test lamp against the coil lead while someone cranks the engine. Pull the probe away from the lead and see how far the spark can jump to your test lamp while the engine is cranking. Should be able to jump 3/4 inch gap with no problem. Don't crank the engine with the cap off without something for the spark to jump to though.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


gahumble
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Feb 6, 2013, 1:39 PM

Post #7 of 8 (612 views)
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  post locked   Re: 1995 mazda, stumbles upon acceleration [In reply to]  

never got the car back. lady sold it as is


Discretesignals
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Feb 6, 2013, 6:57 PM

Post #8 of 8 (601 views)
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  post locked   Re: 1995 mazda, stumbles upon acceleration [In reply to]  

I guess that is the monkey off your back. Thanks for the follow up. Thread closed.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.




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