03 cobra loss of power

[nick96]

My cobras bogging under full throttle at 3000 rpms and up. It has never done this before.. it started doing this at random times but now every time i get on it it does this..

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[Timspony]

Have you checked for any codes??

 

[nick96]

Yeah it always gives me the p7104 for 02 sensor to lean but i always clear it funny thing is i hav the rear 02s shut off

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[Timspony]

What has been done to your car??? ....Do you still have a PPRV?

 

[dsblk93gt]

Rear o2 have nothing to do with the air fuel ratio, the front o2 are the ones that will throw a lean code. I would NOT be going WOT until you get it sorted out. You need to do some diagnostics ASAP.

 

[nick96]

2.81 pulley, catless mac prochamber, borla stingers, cai

 

[onlycodered]

I would say the first step would be to try cleaning your MAF sensor. Not a very difficult thing to do but it's definitely a good idea to make sure the sensor is recording air flow correctly.

Also, I noticed you said the code was P7104. I'm thinking this is actually P0174. Perhaps it was a typo. You can find more info on that code here: http://www.obd-codes.com/p0174

 

[Timspony]

...Is this happening between shifting??? ... or all the time, part time? ... intermittent?

...Still thinking it could be a PPRV thing

 

[ford20]

What is PPRV?

 

[Timspony]

PPRV = Positive Pressure Relief Valve

Here's some helpful info....

PPRV which is a valve system in the fuel assembly that causes hesistation during hard driving. To remove the PPRV you will need to run new lines from the pumps to the y block and then to the fuel hat. Doing so you must make sure to use the proper fuel lines as a standard line will not last being submerged in gas for long periods of time and will eventually deteriorate.

 

[Powerhouse llc]

Is the belt slipping? check for belt dust...tensioner issue? From personal experience..I would have sworn there was no way the belt was slipping..turned out to be the case..props to Posi Port..Brian...said it was and he was right!