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Old 03-16-2008, 12:29 PM   #1
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Default Put stock injectors back in, now no start condition

While trying to figure out why my car wasn't running right with Megasquirt, I put the stock injectors back in and hooked the stock ecu back up.

When I turn the key, it starts and revs cleanly up to 2k rpms (More if I put my foot on the throttle) then dies. After that, it'll just crank without firing until I turn the key to the off position and try again. I've got the AFM back in and there are no vacuum leaks.

Any ideas?
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Old 03-16-2008, 12:54 PM   #2
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So it starts once, then doesnt start again?
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Old 03-16-2008, 12:55 PM   #3
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Does the AFM not have a fuel pump on safety switch. When you install megasquirt dont you modify the fuel pump. Ignition turns on which primes the fuel pump and then its not continued?
Just some ideas.
My ideas are blind suggestions. lol
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Old 03-16-2008, 12:55 PM   #4
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It'll start again once I turn the key to the off position and back to on.
I tried jumpering the fuel pump on, still didn't do the trick.
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Old 03-16-2008, 12:58 PM   #5
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Could it be continually pumping fuel in and flooding?
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Old 03-16-2008, 12:59 PM   #6
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Only if he isnt getting enough spark.
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Old 03-16-2008, 01:00 PM   #7
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It revs cleanly, all cylinders firing, then dies. :(

I'm gonna take a video.
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Old 03-16-2008, 01:16 PM   #8
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Its gotta be a vac leak. You sure you plugged every hole? The hole for the AIT, where you tapped for the megasquirt vac line?
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Old 03-16-2008, 01:18 PM   #9
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The third try I had my foot down at about 1/4 throttle.
Open downpipes are amazing.
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Old 03-16-2008, 01:20 PM   #10
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AIT is plugged in.
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Old 03-16-2008, 01:25 PM   #11
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That sure does seem like a MAF problem to me.
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Old 03-16-2008, 01:48 PM   #12
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Quote:
Originally Posted by Arkmage View Post
That sure does seem like a MAF problem to me.
I just threw the working Rx7 AFM on there. Same problem.

Megasquirt vacuum line is plugged.

Thanks for the suggestions so far. Please keep them coming.
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Old 03-16-2008, 02:03 PM   #13
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Is it your MS that you are running right now? Or the stock ECU in the vid? If its MS reload your base maps and set the fuel, exact same thing happened to me fired up then died, left it for a month went back reloaded the base map and it fired right up weird. It might work give it a try fool around with all your values and look if anything looks weird on the laptop.
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Old 03-16-2008, 02:06 PM   #14
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Quote:
Originally Posted by miataz View Post
Is it your MS that you are running right now? Or the stock ECU in the vid? If its MS reload your base maps and set the fuel, exact same thing happened to me fired up then died, left it for a month went back reloaded the base map and it fired right up weird. It might work give it a try fool around with all your values and look if anything looks weird on the laptop.

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I put the stock injectors back in and hooked the stock ecu back up.
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Old 03-16-2008, 02:18 PM   #15
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Quote:
Originally Posted by Bryce View Post
lmao, no clue then weird cause your getting fuel and spark and compression cause your car starts...hmm is your fuel plug(yellow) under the dash plugged in? If that is it has to be the AFM hold the flapper open when your start it if it stays running while you hold it open then its the AFM.
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