2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Starts better with 3 spark plugs than all 4

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Old May 12, 2017 | 09:25 AM
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Starts better with 3 spark plugs than all 4

So yesterday I'm attempting to fire up my new build (old rotors, new irons and rotor housings) and I'm having a real hard time getting it to start.

I pulled the L1 plug out to check to see if it was firing, turned the key and it started up.

I put the plug back in and again, wldn't start.

After I checked the engine bay for gremlins tried starting again with the plug in and the haltech sw showed the cranking rpm's to be right around 198/200, so I'm thinking the higher compression of the new engine is giving the worn starter a hard time. Release the pressure a bit by pulling a plug and the starter doesn't have to work as hard, starts it right up (even tho missing 25% of the spark).

Gonna try a new starter today. Definitely one of the weirder things I've experienced with this car.
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Old May 12, 2017 | 12:02 PM
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roTAR needz fundZ
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Your also losing a good portion of your fuel mixture that way too. New rebuilds will flood easily until the the seals are broke in, and leaving a plug out leans it out AND lets more air in

Almost sounds to me like you have it set too rich for startup
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Old May 12, 2017 | 12:59 PM
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Originally Posted by lduley
Your also losing a good portion of your fuel mixture that way too. New rebuilds will flood easily until the the seals are broke in, and leaving a plug out leans it out AND lets more air in

Almost sounds to me like you have it set too rich for startup
That's what I thought too. So I experimented with adjusting the cranking fuel map down with no success. Also attempted adjusting the Primed Pulse map w/the same results.
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Old May 12, 2017 | 03:35 PM
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roTAR needz fundZ
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are you using your own map? or a base map off the forums?
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Old May 12, 2017 | 10:01 PM
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Originally Posted by lduley
are you using your own map? or a base map off the forums?
Im using a map given to me from haltech support.
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Old May 12, 2017 | 10:06 PM
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I've has this issue with my 13b pp running an Adaptronic e1280d
It absolutely refuses to start with all four in. Remove the L1 and bam, it fires up.
My suggestion is to try to reconfigure it back to wasted spark and try it again,
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