modified 5.0 lacks power

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08-09-2007, 12:48 PM

#11

my77stang

6th Gear Member

Join Date: Dec 2006

Location: Citrus County, FL

Posts: 8,007

RE: modified 5.0 lacks power

people go .060 all the time, its not a big deal really

08-09-2007, 12:52 PM

#12

94Blk5.0

5th Gear Member

Join Date: Jun 2007

Location: NC

Posts: 2,112

RE: modified 5.0 lacks power

Even with it running right the C-4 trans with 3.73's might not be enough to spin the tires on a car with a top-end kit on it, esp on sticky tires. It is also close to 100*F in a lot of places.

I would have to second what Samseed said- vaccum leak somewhere.
Also let the motor/ trans break in, fix the EGR, check basic stuff (igniton, timing, fuel filter etc.)

08-09-2007, 01:06 PM

#13

samseed101

6th Gear Member

Join Date: Jun 2006

Location: Maine

Posts: 5,693

RE: modified 5.0 lacks power

Quote:

ORIGINAL: bduke
no not really it jjust doesnt seem to have near enough power as it should.

Which is exactly what would happen if there was a vacuum leak. I'm not saying that the problem is absolutely a vacuum leak. But I am saying that it's worth double checking. Ask StanPower on here. He just recently did some upgrades and then the car seemed to fall flat on it's face after that. It was lacking power to the point where he was ready to uninstall the mods... Then he plugged the PCV valve back in (it had popped out) and he was running strnger than before.

08-09-2007, 03:10 PM

#14

bduke

Thread Starter

Join Date: Jun 2007

Location: Dallas

Posts: 25

RE: modified 5.0 lacks power

well i know where my egr goes to the motor it has no hose on it and has some suction when i put my finger over it. but the plugs and wires seem to be good. what do yal mean check the ignition? As you can see i dont know a whole lot about this stuf.

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08-09-2007, 03:37 PM

#15

Ninety5five0

5th Gear Member

Join Date: Nov 2005

Location: Katy, Texas

Posts: 3,311

RE: modified 5.0 lacks power

Get a vacuum tester and make sure thats good, you could also check the compression. Make sure your getting spark to all 8 cylinders. Check your timing too. I bumped mine up a bit when i did my mild build and it helped it run a whole lot better. Side note - our cars (sn95's) dont run all that well without some kindof tuning after any modifications, if you can take it to the dyno. If you are willing to learn buy a handheld tuner.

08-09-2007, 04:02 PM

#16

samseed101

6th Gear Member

Join Date: Jun 2006

Location: Maine

Posts: 5,693

RE: modified 5.0 lacks power

Quote:

ORIGINAL: bduke
well i know where my egr goes to the motor it has no hose on it and has some suction when i put my finger over it. but the plugs and wires seem to be good. what do yal mean check the ignition? As you can see i dont know a whole lot about this stuf.

That right there is a vacuum leak. If there is some part that doesn't have a hose on it and if you can feel suction when you put your finger over it, then that is a vacuum leak and that can cause the problems you are describing. The bigger the leak (or the more leaks you have) the more problems you'll have.

I'm not so sure why you keep dismissing the possibility of a vacuum leak. You keep saying it's not it. Then you go on and tell us that you can see / feel suction. Then you press on and talk about ignition, plugs, wires, etc.