Possible Pulley Problem

SubZero00GT

SubZero00GT

Well-Known Member
#1
#1
I'm not sure what the problem is actually but here's the symptoms..

Feels like something is slipping or not firing properly..
It was only under boost and WOT... But not it's doing it with normal driving too.. Primarily in the lower rpms
No Check Engine Light Codes..
Heavy Vibration..

If i just rev the engine it won't do it only if i'm driving and getting on it..
 
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MaximumRisk

MaximumRisk

NYC Regional Coordinator
#2
#2
first thing that came to mind was crank damper, but you said that it only does it at WOT?

Check to see if any of the pulleys are wobbling at idle.
 
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bladez

Well-Known Member
#4
#4
Did you check your FRPS (fuel rail pressure sensor) on the driver side fuel rail. Pull the vacuum line off and see if it has fuel in there. It is possible that this has started to fail on you causing your problem at WOT.
 
SubZero00GT

SubZero00GT

Well-Known Member
#5
#5
What's getting me the most is it's not throwing and CEL.. At first it sounded like misfiring because when i got on it, the boost would kick in but it felt like i was accelerating under no boost or that it wasn't getting enough fuel...
 
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bladez

Well-Known Member
#6
#6
Have you made any changes or did it just do this just randomly? I would check the FRPS anyway just to eliminate it. It takes 2 seconds to check.

I have had mine fail and not throw a check engine code. The car would run fine at part throttle and idle but when I would try to boost it would cause the car to buck, not have any power, hesitate, and sound like it was misfiring.
 
SubZero00GT

SubZero00GT

Well-Known Member
#7
#7
Okay... So now it's doing it under normal acceleration..


bladez said:
Have you made any changes or did it just do this just randomly? I would check the FRPS anyway just to eliminate it. It takes 2 seconds to check.

I have had mine fail and not throw a check engine code. The car would run fine at part throttle and idle but when I would try to boost it would cause the car to buck, not have any power, hesitate, and sound like it was misfiring.
Click to expand...
I've made no changes at all.. How do i check the FRPS?
 
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bladez

Well-Known Member
#8
#8
Simply pull the vacuum line off of the FRPS (driver side fuel rail closest to your pulley) and check to see if the inside of the line is wet. If it is, you will need a new FRPS.
 
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bladez

Well-Known Member
#10
#10
Okay, lets try one more test to be sure it is not the FRPS. With the car running, pull the vacuum line off and blip the throttle a little bit and watch to see if any fuel seeps out.

If you get nothing we can eliminate this as a problem.
 
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bladez

Well-Known Member
#16
#16
Yeah def. Pull the plugs and let us know how they looks :). I think it'll only throw a code if the coil fails. If the plug goes down or is misfiring it probably won't throw a code
 
SubZero00GT

SubZero00GT

Well-Known Member
#17
#17
So a couple of them weren't really tightly screwed in.. I probably could have taken them out with my hand if i had room.. Here's a couple of them..



 
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