Problem with my vert - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 6 Old 10-11-2014, 03:02 PM Thread Starter
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Problem with my vert

I have a fox with a sputter around 46-4800+ rpm, feels like its lean. The car has a A9L with a sct 4 bank chip, 24lb injectors with a bbk 24lb mas, 65mm tb, gt40 intake, bbk equal length headers & offroad xpipe, 255lph pump with a kirban reg set at 42 psi,stock cam with 1.72 rockers and cleaned up e7 heads ive replaced every sensor with motorcraft parts just so i wouldnt have any problems lol. Im a carb guy so i pulled the plugs and they are clean just like i pit them in, tells me lean. also turned the fuel psi up lastnight 50 then 55, at 50 the idle started to come up its up around 1k now. took it for a spin still the same problem, any incite would be very helpful im pulling my hair out on this car since i got it running


Last edited by shifted302; 10-11-2014 at 03:06 PM. Reason: forgot to add what cam
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post #2 of 6 Old 10-12-2014, 10:09 AM
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Feels like it's lean? Maybe ask who tuned it. Did it ever run right? Really not much info to go on.. Seeing that you have 24lb injectors and a 24lb calibrated MAF I'd remove the chip...

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post #3 of 6 Old 10-12-2014, 11:52 AM Thread Starter
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Yeah it surges like a carbed engine thats lean. The plugs are super clean like I just put them in. I bought the chip from sct. What other info you need? No its been like this since I put the car together 180 miles on it.
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post #4 of 6 Old 10-12-2014, 01:59 PM
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unplug the spout, tps, and iac at a warm stable idle, adjust the set screw so it idles at 600ish, shut it off plug the connectors back in

if you cranked up the fuel pressure and the rpms shot up it was lean, it shouldnt make any difference since the o2s will trim fuel, so that leads one to believe the o2s are disabled in the tune.. not good

if it responds with the extra fuel pressure throw it in there

if its got 24s with a 24 cal maf then remove the chip and run it, should run like a stock car

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www.efidynotuning.com
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post #5 of 6 Old 10-12-2014, 05:42 PM Thread Starter
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I can't have it idle that low, I have underdrive pulleys on it. When I do put more pressure to it the idle does come up a little.
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post #6 of 6 Old 10-13-2014, 01:15 PM Thread Starter
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I think i might have found the problem, pulled the codes and has 2. 1st one is MAP out of test range and the 2nd is air intake sensor open.
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