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S14 sr20 revs out but won't idle

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Old 07-31-2010, 11:02 AM
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Exclamation S14 sr20 revs out but won't idle

Got a s14 with s14 sr20 with gt30 550s injectors z32 maf splitfire coil packs and apexi neo And Greddy type s bov the car will car will start but have to unplug maf sometimes to start but once car is started and u give it gas it's will rev but break up till about 3000 rshared_pm then it will rev smooth all the way out to like 6000 rshared_pm suggestion on wat the problem might be anything will help thank you
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Old 07-31-2010, 12:51 PM
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may have the wrong ECU? Also if you have a z32 maf it needs to be tuned. SRs will work up to 15 pounds without a tune but once you put that z32 in it it wont work without a tune.

But my car had the wrong ECU in it for a while. i had s14 SR ECU instead of the S13 ECU and it did the same thing so find someone with a s14 SR ECU and have em plug it in see if it fixes it. if you anywhere near melborne i can get you the number for someone who has a spare one.

Edit: If your unplugging the maf to start it ill put my money on it needing a tune.
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Old 07-31-2010, 03:03 PM
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^^ what he said... something sounds a little off though.. did you buy this car like that? if so ask the seller what ecu was ran with this car. just sounds weird someone would ONLY have a NEO with all of those mods..
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Old 07-31-2010, 06:35 PM
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It's a s24 sr ecu a WC and I put all the mods on it
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Old 08-01-2010, 03:06 AM
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did you get it tuned for the MAF?
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Old 08-01-2010, 09:49 AM
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U mean like get the ecu chipped for the z32 then no it's just a stock s14 sr ecu
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Old 08-01-2010, 01:29 PM
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You need to have it tuned for those mods. That motor is going to pop in you. Will it idle with the MAF unplugged?
Old 08-01-2010, 02:15 PM
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Well I went over all the wiring and fixed any Vacum leaks and now the car starts with the mag pluged in but will idle at like 750 800 rshared_pm and if I give it gas it will slow sputter and rev and once it gets close to 3000 it revs smooth till it get close to 5000 it will start breaking up a backfiring and spits flames
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Old 08-01-2010, 02:19 PM
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Yeah it is kinda hard to tune 550s with just an AFC. I suggest a ROM tune before you wash all your cylinders out.




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