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plz help.. v8 pulls like a 4 banger

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Discussion starter · #22 · (Edited)
Seabee said:
The one hooked up to the intake, the ones coming from the valve covers. Any hose you see, check it
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done.. they are all ok.. i unplugged the one from the driver side valve cover and there was lots of oil in there
btw the car sneezes everytime i shut it off... like a BOV sound..pshhh
does that indicate something?
 
#23 ·
Thats not normal, sorry cant help though.
 
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#24 ·
spunky602 said:
done.. they are all ok.. i unplugged the one from the driver side valve cover and there was lots of oil in there
btw the car sneezes everytime i shut it off... like a BOV sound..pshhh
does that indicate something?
Click to expand...
thats because of the intake they all do with a intake. mine really does it and all 6 cars ive owned ive put a intake on and it makes it happen
 
#26 ·
the "psshhh" sound is very common with a cold air intake. But your saying the sound isnt coming from the intake tube/air filter? Have someone else turn the car off while your head is under the hoos listening for the sound. I cant imagine it not coming from the air filter unless there is a large vacuum leak somewhere. I would think it would be setting a code if there was though...
 
#27 ·
Ive never heard that sound after turning the car OFF. And its a stock intake anyway.
 
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#28 ·
Intake/vacuum leak sounds like to me, but thats just going by hearing what you say about it. It's hard to diag a car on the web. Best bet is take it to a Ford dealership, completely stock. They will be able to tell you what is going on for a diag fee of usually 1 hr labor. If you can get your hands on a smoke machine, smoke test the intake system.
 
Discussion starter · #29 · (Edited)
#30 ·
This site helped me out earlier this week when I had problems. Check it out.

OBD-II Trouble Code: P0155 Oxygen O2 Sensor Heater Circuit Malfunction (Bank2, Sensor1)

What does that mean?
This code refers to the front oxygen sensor on Bank 2. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0155. See also: P0135 (Bank 1).

Potential Symptoms
You will likely notice poor fuel economy the illumination of the MIL.

A code P0155 may mean that one or more of the following has happened:

•O2 Heater element resistance is high
•Internal short or open in the heater element
•O2 heater circuit wiring high resistance
•open or short to ground in the wiring harness

Possible Solutions
•Repair short or open or high resistance in wiring harness or harness connectors
•Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
 
#31 ·
If it was just bought a couple days ago, I would take it back to whoever you bought it from. There is no way I would want to be in a mess like that where you purchase a car that isnt running right and have no clue whats been done to it or why it started doing it in the first place.
 
#32 ·
Discussion starter · #33 ·
ok some progress.. found a shortage in the o2 sensor harness and repaired it.. no more check engine light.... but it still pulls like crap
tps reading when at full throttle and the engine is off is 76%.. which is normal cuz i checked another car
but when the engine is on and the car is moving.. at full throttle its fluctuating and peaks at 63% but it doesnt stay there.. it ranges from 30 to 60 %.. while am flooring it
it was a nasty zigzaggy reading on hp tuner...btw i switched the throttle body already with a friend and it didnt make a difference.. still fluctuates
 
#37 ·
Its the tune.

I would find out what mods have been done by previous owner and just have someone like VMP tuning send you a custom tune.
 
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spunky602
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