Don't pay much attention to the factory boost gauge. It's not accurate at all. Maybe for fun go take it to the dyno and just see what it puts down. I think you would be really happy with a tune from Lund or VMP. It changes so much about the car.
13 GT500 Seems weak
- Thread starter 03SonicStang
- Start date
Could it be in Valet mode?
Going to get the car Dyno'ed ASAP.....I need to know what the heck is going on. My modified 03 Cobra never felt that way!!!!
I believe the 13/14s are more sensitive to heat and knock than the 03/04 cobras were, But see what it puts down
Here is what you see between the gauges in the valet mode.
Nope, that's not it.....thanks snoopy
Somethings that will contribute to "Limp mode".
Thank you for your post.
The clutch mode could be, but states it does effect acceleration. I assume a lot of these modes would throw a code as well.
I kept an eye on the guages and nothing over heated, and the intake temp never got over 120.
Talked to a buddy of mine that works for Roush and he found it very odd. He has an engineering meeting with Ford tomorrow and said he'll pick thier brain.
Hope to get on a dyno in the next couple of weeks. It's really strange, never had a car do this.
On a good note, I fixed the fish tank leak
Have you checked to see if the intercooler pump is working? It is a known problem on these cars. As a matter of fact mine is going in for warranty Monday. Low boost and low power. Feels like a Gt.
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You will have to data log to know for sure, the stock tune will pull timing right away with moderate iat2 temps. The heat will really effect these cars in stock form, on a side know never go wot with low fuel like that. You could really be down on power and need a new motor fast. I always run with at least a half tank so both fuel pumps get enough fuel. It's not like the 03/04s where you could run a quarter tank.
Have you tried any other launch modes?
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The vacuum holds the bypass valve open, so if there was a vacuum leak in the control hose, the valve would close causing an increase in boost.
Vacuum leak would most likely cause a check engine light, these cars are pretty sensitive.
Ok, didn't pay much attention to original bypass/ vacuum before cams.
I had a small leak after cams/vacuum mods with no light, just didn't go into boost correctly.
Id still hook a mechanical gauge up just for a quick cheap check.
Oh, also could be egr valve stuck??? Or disconnected, or vac lines bumped off somehow? Egr valve leak was my vacuum leak. Made things run wierd.
I had a small leak after cams/vacuum mods with no light, just didn't go into boost correctly.
Id still hook a mechanical gauge up just for a quick cheap check.
Oh, also could be egr valve stuck??? Or disconnected, or vac lines bumped off somehow? Egr valve leak was my vacuum leak. Made things run wierd.
Probably this. Mine is suffering from the exact thing you mentioned and you can't measure it on the stock gages. From my understanding the computer starts pulling timing once IAT2 temps reach 125 degrees which happens almost minutes after startup if your IC pump isn't running, which mine isn't. I noticed mine felt week once out of first gear. I was doing some spirited driving next to a friend of mine who has a modded 5.0 and I couldn't put more than a car on him. I knew something was wrong. Been chasing the problem ever since...
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Def take it to Lidio and he'll not only figure it out but also get you nice power with a tune. My '14 is in his shop right now awaiting a forged engine, cams, etc.
Good luck.
-J
Interesting. I drove the car yesterday and it feels weak as hell after about 3-4 pulls. Told my wife I'm selling the damn car, she of course rolled her eyes. Maybe its this....
This. I'm going to make an appointment after the holiday and get the car in. My 03 Cobra ran so much better after he had his hands on it! completely different car!
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