Dead spot at WOT occasionally. Any idea's???

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tHeOnEGT

Founding Member

Apr 9, 2001

175

0

0

new jersey

Jun 22, 2004

#1

• Jun 22, 2004

• #1

I just bought my notch about 3 months ago, finally got insurance and got it onto the road. The mods are Gt-40 heads, intake, custom cam, pro-m mass air, 24 LB injectors, long tubes, o/r H, flows, 190 fuel pump. It doesn't have a chip, stock ignition. It drives and rides great except for the occasionall dead spot at wot. Example: Say i take off in second around 2k, it will start moving till 3k, then seem to die, and then around 5 k seem to pull again all the way to 6K. It only does it sometimes, when it runs right the thing ****in moves.

What do you guys think the problem is, you think it might need a dyno tune, or is it maybe something simplier"TPS, fuel pressure, Plugs,distributer ???


eric

 

mr5o

Founding Member

Jan 28, 2001

931

0

16

Ontario, Canada

Jun 22, 2004

#2

• Jun 22, 2004

• #2

mine does the same thing ..pops kinda like a backfire sometimes ....only had the car back a week ..mods below

 

ironheart1

New Member

Mar 13, 2004

131

0

0

Connecticut

Jun 23, 2004

#3

• Jun 23, 2004

• #3

Mine did it too. I ended up with bad spark plug wire on cylinder 1, it would arc on occasion... Check your plugs and wires. One bad wire or plug and as I'm sure you're awre, it can ruin a car's performance.

 

fordman54935

Member

Jan 10, 2003

301

0

16

Wisconsin

Jun 23, 2004

#4

• Jun 23, 2004

• #4

When the TPS on my 2.3L LX crapped out, it was having similar symptoms to what you have. A TPS can be checked with a DIGITAL volt/ohm meter: with the key on, hook up the TPS to your volt meter just like if you were setting TPS voltage, and slowly open the throttle body. Its not the most accurate way, but you'll be able to tell if there is a dead spot.

Good Luck!

 

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strokergt

New Member

Mar 14, 2003

7

0

0

Jun 23, 2004

#5

• Jun 23, 2004

• #5

mines doing the same thing only when its semi cold...ill get on it and it wont do anything for ~2-3 sec maybe back fire a tad....then it catches up while its floored and surprises you sometimes lol...

Somone told me it might be unrestricted air pass the mass air meter

 

9

98svtconvert

New Member

May 26, 2004

85

0

0

va beach, va

Jun 23, 2004

#6

• Jun 23, 2004

• #6

i have a 98 cobra that was doing something similare. at wot around 5500 rmp it would kick and sputter. it was fine under normal driving. ended up being one of my coil packs. i would check your wires and other ignition components. could be hard to find if it only does it under heavy load. i found mine by chance. i just changed a coil pack and it fixed it. good luck.

 

r6bullet

New Member

Jul 25, 2003

112

0

0

Jun 23, 2004

#7

• Jun 23, 2004

• #7

I would try to find a nice shop, the reason being is in my auto tech class we have a machine that you can actully graph out a tps or any other sensor reading. That graph will show you exactlly where your dead spot is if any. Make sure your ignition system is running the way it should. We also have a machine that does that, puts your entire ignition system on a pc and shows you how much voltage is being deliverd to each plug. So if you have some buddies that work at a shop see if they could hook you up. I think it is the tps, good luck

 

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tHeOnEGT

Founding Member

Apr 9, 2001

175

0

0

new jersey

Jun 23, 2004

#8

• Jun 23, 2004

• #8

thanks guys,

I was thinkin of gettin a dyno tune anyways for optimum performance, i figure a good shop like larocca's would probably have these machines, ill look around.


eric

 

FiveO

Founding Member

Jan 28, 2001

1,146

0

0

NJ

Jun 23, 2004

#9

• Jun 23, 2004

• #9

tHeOnEGT said:

I just bought my notch about 3 months ago, finally got insurance and got it onto the road. The mods are Gt-40 heads, intake, custom cam, pro-m mass air, 24 LB injectors, long tubes, o/r H, flows, 190 fuel pump. It doesn't have a chip, stock ignition. It drives and rides great except for the occasionall dead spot at wot. Example: Say i take off in second around 2k, it will start moving till 3k, then seem to die, and then around 5 k seem to pull again all the way to 6K. It only does it sometimes, when it runs right the thing ****in moves.

What do you guys think the problem is, you think it might need a dyno tune, or is it maybe something simplier"TPS, fuel pressure, Plugs,distributer ???


eric

Click to expand...

without reading the rest of the replies, i'm going to say your clutch could be slipping. my car will do the same it will pull hard slip for a bit to where it feels dead and then grab again at 4k-ish.

 

gaslight

Founding Member

Jul 12, 2000

3,364

16

99

Maine

Jun 25, 2004

#10

• Jun 25, 2004

• #10

I would check your fuel pressure. You should be able to turn it down a little since you are now using larger than stock injectors. Too bad you dont have access to a wideband O2 sensor. I got one recently and love using the thing.