problem making hp passed 4500

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Feb 26, 2010 | 03:21 PM

ALEXZ28

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problem making hp passed 4500

my camaro is breaking up around 5 and isnt making power just falls. i have new plugs,wires,and coil. sometime it shuts off while im coming to a stop.

opti?????????????????????????????

Feb 26, 2010 | 03:46 PM

CRAZZ28

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From: Warsaw, IN

sounds more like a fueling issue to me

Feb 26, 2010 | 03:51 PM

ALEXZ28

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thought of that the tuner says that the air to fuel was fine.

Feb 26, 2010 | 04:20 PM

draggin97s10

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M friends car is doing the same thing. New opti icm wires plugs

Feb 26, 2010 | 04:22 PM

ALEXZ28

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Quote:

Originally Posted by draggin97s10

M friends car is doing the same thing. New opti icm wires plugs

so his opti was the problem?

Feb 26, 2010 | 04:23 PM

CRAZZ28

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From: Warsaw, IN

Quote:

air to fuel was fine.

I was thinking more along the lines of your fuel pump is taking a dump. has it been acting up since the tune? or did it run fine for a while?

Feb 26, 2010 | 04:27 PM

ALEXZ28

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Quote:

Originally Posted by CRAZZ28

I was thinking more along the lines of your fuel pump is taking a dump. has it been acting up since the tune? or did it run fine for a while?

it was breaking up on the dyno

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Feb 26, 2010 | 04:41 PM

ALEXZ28

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i have new ngk tr6 plugs and i have replaced my icm, and all wires are fine.

Feb 26, 2010 | 05:21 PM

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RamAir95TA

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Have you checked for ample fuel pressure?

Feb 26, 2010 | 09:35 PM

#11

ALEXZ28

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the tuner says that the fuel was fine. air to fuel was fine.

Feb 26, 2010 | 09:43 PM

#12

RamAir95TA

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From: South Jersey

Fuel pressure, is what I mean...

Feb 26, 2010 | 10:43 PM

#13

ALEXZ28

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i havent checked it bc the tuner told me that its fine. could it be my tune?

Feb 27, 2010 | 06:29 PM

#14

CRAZZ28

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From: Warsaw, IN

Quote:

Originally Posted by ALEXZ28

i havent checked it bc the tuner told me that its fine. could it be my tune?

Air/Fuel ratio is the ratio of fuel to air being mixed in the combustion chamber.

Fuel pressure is the amount of pressure in the lines and rails upstream of the injectors.

If you have low fuel pressure, the motor will run fine until that low pressure keeps the injectors from adding enough fuel. Thus causing missfire/hesitation/breaking up in the higher rpms under load. The afr would be fine up until the point where it starts breaking up.

Now that being said your problem could very well be your optispark, but it takes about 15 seconds to hook up a mechanical fuel pressure guage to your schrader valve and check the pressure. As opposed to 2-3 hrs to change the distributor.