WTF? Engine dies for no reason - Ford Mustang Forum
 
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post #1 of 13 (permalink) Old 02-24-2016 Thread Starter
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Angry WTF? Engine dies for no reason

So here we go the most WTF moment ever. I have a 2006 GT and for I have no idea why the engine dies every time it hits about 208 deg F. I can drive long trips no prob so long as I keep moving and it stays cool. But in traffic or at a signal it hist about that temp and bam dies. When dead it'll crank but not fire. When it does start back up again its because it has cooled off and is under that temp and I can drive again. Since it is a heat related issue not a time issue I am wondering if it could be the crank position sensor, (do we have those or only the cam position sensors)? My thought is that when it gets too warm the electronics in some random sensor overheat and fail until cooled. Seriously though I was at a shop the last 3 days and they are all scratching their heads in wonder. First it was thought to be a car alarm related issue since I have a Viper remote start but it is not time based I just drove 1 hour and no problem, and all the viper electronics are under the dash and i had the heater on full blast to keep the engine cool so the inside of the car was hot as hell. Any ideas from yall?

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post #2 of 13 (permalink) Old 02-24-2016
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Im not sure if its the answer to your problem but yes we do have crank position sensor. and a bad one give the same condition of crank but no start, but it sounds like you knew that already based on your post. its a cheap enough part to start with In my opinion.

http://www.fordparts.com/Commerce/Pa...&model=Mustang


also....do you recon you might have another wiring crimped or cut problem from the clutch install? maybe worth a peek

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post #3 of 13 (permalink) Old 02-24-2016 Thread Starter
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I was thinking sensor because I have a reasonable amount of computer electronics experience and it sounds reasonable. but now I heard that there might be something in my sct tune that has a fail-safe for overheating. So I'm gonna call sct and ask about that before I go spending money on parts.
Also thanks because that page showed where the damn crank sensor is located too.
And after my trans fiasco I went through that whole thing with a fine tooth comb just to make sure there is nothing else of the sort.
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post #4 of 13 (permalink) Old 02-25-2016
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no problem, hope you get it sorted soon, dont forget to post back when you do.
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post #5 of 13 (permalink) Old 02-25-2016
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Possible fuel pump issue?

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post #6 of 13 (permalink) Old 02-25-2016
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Quote:
Originally Posted by rasmukri View Post
So here we go the most WTF moment ever. I have a 2006 GT and for I have no idea why the engine dies every time it hits about 208 deg F. I can drive long trips no prob so long as I keep moving and it stays cool. But in traffic or at a signal it hist about that temp and bam dies. When dead it'll crank but not fire. When it does start back up again its because it has cooled off and is under that temp and I can drive again. Since it is a heat related issue not a time issue I am wondering if it could be the crank position sensor, (do we have those or only the cam position sensors)? My thought is that when it gets too warm the electronics in some random sensor overheat and fail until cooled.
I think you've hit the nail on the head.
The pushrod 5.0 engine in the Fox & SN95 doesn't have a crank position sensor but it does have a Hall Effect PIP (profile ignition pickup) sensor inside the distributor that acts as a cam position sensor. When that begins to fail, it's also heat-related and the symptoms are exactly the same (random stalling, crank but no start).


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post #7 of 13 (permalink) Old 02-25-2016 Thread Starter
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Well not this morning the car will just crank without turning over. It is getting fuel and compression but no spark. so im going to replace the crank sensor and see if that works. If not what other areas should I check?
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post #8 of 13 (permalink) Old 02-26-2016 Thread Starter
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So I got the crank sensor changed and it eventually fired up. But every time I try and fire it up it basically floods and I have to crank forever. But when it's running the exhaust smells fine. This seems like a tune issue but the guy at the shop is out till Monday. Is there anyway to adjust the fuel myself with my sct xf3
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post #9 of 13 (permalink) Old 02-26-2016
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Quote:
Originally Posted by rasmukri View Post
So I got the crank sensor changed and it eventually fired up. But every time I try and fire it up it basically floods and I have to crank forever. But when it's running the exhaust smells fine. This seems like a tune issue but the guy at the shop is out till Monday. Is there anyway to adjust the fuel myself with my sct xf3
,

how long have you been running the tune? and has it always done this on that tune?

if its been running fine before, i suggest cleaning the MAF sensor, you may be dumping fuel at start because of a bad reading.
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Check Fuse #47 in the underhood fuse box, or better yet just replace it. I once had an issue where once the car got hot, the engine would just shut off, even at speed. Throw it in neutral to keep it rolling and it would start right back up with the key. After doing that for awhile, it started to refuse to start back up even when it had cooled off. The fuse must have had a tiny crack in the beginning which expanded when it got hot, breaking the connection. There was no obvious evidence of the fuse being bad until the point where it would not start back up - that's when a teeny tiny burn spot became visible. Replaced the fuse and it has been fine for months now.

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post #11 of 13 (permalink) Old 02-27-2016 Thread Starter
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Quote:
Originally Posted by funkboy316 View Post
,

how long have you been running the tune? and has it always done this on that tune?

if its been running fine before, i suggest cleaning the MAF sensor, you may be dumping fuel at start because of a bad reading.
I've had the tune for 3 days and the starting/flooding problem began with the tune. I've not been able to replicate the engine cutting of for some time now. My only problem now is the tune I think. I have 60# injectors but only need them to run at 40# I'm pretty sure the tune guy has them set at 60. So on Monday when he gets me a new tune turning down the power of the injectors I'm thinking it'll be ok.
But also it only has a hard time starting when cold. I'm pretty sure this is the fuel injection version of a choke spitting all that gas in there. And that would explain why it starts fine once the engine is warm. So yea I have hypothesised the injectors are spitting too much gas in there.
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Sounds like it needs to be tuned in a dyno or it's going to be a problem child. With 60# injectors you can pretty much give up on have decent street manners. Race cars make terrible daily drivers. I've turned wrenches on some pretty hot mustangs so I feel my opinion has some merit. I wish the best of luck to you.
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I would put my money on a coolant temp sensor, just an opinion from what your saying some fords have issues staying running because of the temp sensor sending false info to the ecu
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