Hesitation at all RPM's

ViperBlueCobra · 11-12-2009, 10:43 PM

Test driving a car tonight. 2007 Mustang GT500.

modifications: Full Ford Racing suspension, 3:73 gears, ford racing shift, kooks long tube headers, catted x-pipe, magnaflow mufflers. Pulley (how do you tell the size), and a cold air intake (looks like steeda stuff)

While test driving at any rpm that I went wide open, it would pop and spudder throughout the rpm range. Do you think it could be as simple things as plugs? At idle there is tons of fumes. I can hear a slight ticking from the exhaust, most likely a small exhaust leak. Could that cause the hesitation?

What should I look for when purchasing a gt500 that already has such extensive mods? How can I make sure the clutch is good and I'm not going to blow up the motor?

Any tips would be nice, found a really good deal on her and ready to take her home tomorrow.

Josh

manOwar · 11-12-2009, 10:49 PM

It could very well be the plugs, How many miles? Also, the CAI might be leaking after the MAF.

ViperBlueCobra · 11-12-2009, 10:53 PM

9,300 miles on the car.

It was dark, couldn't really tell on the cold air. But didn't look like a high quality, jlt, c&l type set up. Is there a particular intake that people are having problems with?

manOwar · 11-12-2009, 11:19 PM

Quote:

Originally Posted by ViperBlueCobra

9,300 miles on the car.

It was dark, couldn't really tell on the cold air. But didn't look like a high quality, jlt, c&l type set up. Is there a particular intake that people are having problems with?

I would take a look at the plugs. Did you see what tuner was with it? I'm hoping it has a tune for the mods you listed!
It's not uncommon for any intake to leak if they don't pay attention whe putting it back together. It's easy to have a clamp slip off when tighening it.

ViperBlueCobra · 11-13-2009, 09:03 AM

Quote:

Originally Posted by manOwar

I would take a look at the plugs. Did you see what tuner was with it? I'm hoping it has a tune for the mods you listed!
It's not uncommon for any intake to leak if they don't pay attention whe putting it back together. It's easy to have a clamp slip off when tighening it.

What's great is the guy brought all his stock parts with the car. Air intake, springs, shocks, etc. There is a SCT tuner as well, looks like the X3 or SF.. need to look at it closer.

09Troublemaker · 11-14-2009, 06:15 PM

Quote:

Originally Posted by ViperBlueCobra

What's great is the guy brought all his stock parts with the car. Air intake, springs, shocks, etc. There is a SCT tuner as well, looks like the X3 or SF.. need to look at it closer.

IMO. You need to get her on a dyno before laying any beans down
perhaps the problem is simple or NOT

me32 · 11-14-2009, 06:52 PM

Quote:

Originally Posted by 09Troublemaker

IMO. You need to get her on a dyno before laying any beans down
perhaps the problem is simple or NOT

+1 take it to a shop that can let you know what it is before you buy it

Alloy Snake · 11-15-2009, 03:47 PM

Sounds like a very lean condition,Hopefully it can be worked out.I would ask for a compression check/Spark plug change at a minimum.

rdsnk46 · 11-15-2009, 07:40 PM

Plugs!

Q8_Shelby · 11-16-2009, 06:43 AM

Quote:

Originally Posted by me32

+1 take it to a shop that can let you know what it is before you buy it

+2

ViperBlueCobra · 11-16-2009, 10:30 AM

I put factory plugs in it, seemed to have cured it. However, I'm scared that factory plugs are not cool enough.

mullens · 11-16-2009, 08:37 PM

You'll be fine with the stockers. They are a good platinum plug, and well within the heat range for your mods. If you had a 3.4 whip or KB running real high boost, then I'd be a little concerned.