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Technical Q&A. HOW TO's, TSB's & Warranty Items Have a Problem? Technical Questions & Answers. HOW TO's & TSB's, Warranty Issues

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Old 06-20-2015, 10:51 AM   #1
Mach1Junkie
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how do I use my sct to find out why service engine is on

How do I use the sct xcal3 to see why service engine soon is on? I have a custom tune that the guy did who dyno'd the car and I've been afraid to plug the sct in cause I don't wanna mess with the tune.
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Old 06-20-2015, 11:39 AM   #2
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Re: how do I use my sct to find out why service engine is on

I know how you feel, I did the same thing after a year of my tuner using my SCT, scared me to death to even plug it in. Make sure you have key off, plug it in and scroll to menu that says Read DTC, hit select or whatever your is and it will tell you to turn key on but don't start the car..wait a moment and codes will come up, as well after a repair you can clear the codes as well with no issues with tune in the unit.
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Old 06-21-2015, 12:33 PM   #3
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Re: how do I use my sct to find out why service engine is on

Thanks dude I'm gonna try that right now.
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Old 06-21-2015, 05:16 PM   #4
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Re: how do I use my sct to find out why service engine is on

You have to go through several steps to do anything with loading a different tune or making any changes, you aren't likely to accidentally do anything
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Old 06-22-2015, 10:58 AM   #5
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Re: how do I use my sct to find out why service engine is on

It said knick sensor, slow o2 , startup misfire, and cylinder misfire the engine sounds fine does this mean I have internal damage? I'm really worried now.
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Old 06-22-2015, 11:17 AM   #6
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Re: how do I use my sct to find out why service engine is on

do you have a power adder on the car? If not I wouldnt be too worried. Depending on when you did them last I would start with plugs and possibly coils (did it say which cylinder?)

I would replace whichever O2 is being reported as slow (depending on mileage might wanna just do both)
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Old 06-22-2015, 05:44 PM   #7
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Re: how do I use my sct to find out why service engine is on

I'm running a procharger d1sc and it said cylinder number 5. I have a huge fuel system and a local mechanic thinks it may be the plugs too (or coil packs) I cleared the light but when I start it they come back on and say misfire @ 1000 rpm. The local guy said try reseting the KAM which I did. It would have given me a warning if it was gonna erase the tune right? I'm only running 10 psi of boost but have 10:1 compression.
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Old 06-22-2015, 09:52 PM   #8
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Re: how do I use my sct to find out why service engine is on

you did not erase the tune, it requires loading a new tune that you have to pick from a list and confirm thats what you wanna do then it takes a couple minutes to load the new tune.

I would put fresh plugs in it and see what # 5 looks like promptly
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Old 06-23-2015, 07:43 AM   #9
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Re: how do I use my sct to find out why service engine is on

Will do. I won't drive it untill I do plugs and coils. (Fan switch melted during an inspection anyway)

The handheld said the misfire happened at 1000 rpm @ idle if I can't get new plugs by Thursday I have a graduation to attend is the car safe (it does run pretty rich) ?
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Old 06-23-2015, 09:10 AM   #10
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Re: how do I use my sct to find out why service engine is on

Looks like all I can afford after the build are the accel coil packs are those a decent product?
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Old 06-23-2015, 10:16 AM   #11
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Re: how do I use my sct to find out why service engine is on

I did a super quick google search, arent those around $200 for a set of 8? I have seen mixed/poor results from everything but motorcraft

try Tasca Ford parts online or call AutoNation Ford (used to be Gene Evans Ford),
4355 Jonesboro Rd, Union City, GA 30291
(770) 674-6075

As for Rick in the parts department and ask for Mach1Registry member pricing on coil packs. I think you can get a set for not much more than the accel coils.
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Old 06-23-2015, 10:22 AM   #12
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Re: how do I use my sct to find out why service engine is on

Thanks dsg. So your of the opinion the sick
Stock ones are better than aftermarket even if I spent a few more bucks? Wanna make sure problem doesn't happen again.
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Old 06-23-2015, 11:41 AM   #13
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Re: how do I use my sct to find out why service engine is on

I just dont trust the aftermarket ones to fix your issue. Ive seen a lot of people have weak coils out of the box or go on the fritz shortly after install. Being that you can get stock coils for not that much more if you shop around the right places, go with stock ones
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Old 06-23-2015, 03:02 PM   #14
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I ran the Accels. They're in a box on the shelf. The stock COPs are much better.
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