Weird engine noise after I came home

DrEvil · 08-24-2011, 02:20 PM

Here's a followup on the pumping noise that some of us have heard. I've been hearing it for the past several weeks, especially after the motor has been running for a while. Coincidently I was getting a cel and thinking about some of the posts here, I thought it might be related to the hfcs' I had installed about two months ago.I hooked up the code reader and I got banks one and two running lean. I thought that it must be the infamous cel related to the hfcs that some folks reported getting about two months after the install. I ended up driving the poor tuner crazy. He checked out the exhaust system and the O2 sensors and all were fine. Hed tested the car and got no cels'.
The next day I took her out and got the cel over and over. So I called him, we talked and then he suggested checking the hoses up top. So I l;ooked arround under the hood and found that the air ram on the right throttlebody had slipped out of the rubber collar (some how the hose clamp sliiped off of the collar) and was just sorta hanging on half off, half on. I reconnected it, tightened the clamp, very well, and started her up. Purred like a kitten, idle was silky smooth again, no cels and no more pumping sound. It was an air leak, the thottlebody was sucking unmonitered air!
Any way do check for an air leak.

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08-24-2011, 02:20 PM	#6 (permalink)
DrEvil Enthusiast Member Join Date: Jan 2011 Location: New Jersey Posts: 270 Drives: 09 370z,Blue, auto Rep Power: 15	Here's a followup on the pumping noise that some of us have heard. I've been hearing it for the past several weeks, especially after the motor has been running for a while. Coincidently I was getting a cel and thinking about some of the posts here, I thought it might be related to the hfcs' I had installed about two months ago.I hooked up the code reader and I got banks one and two running lean. I thought that it must be the infamous cel related to the hfcs that some folks reported getting about two months after the install. I ended up driving the poor tuner crazy. He checked out the exhaust system and the O2 sensors and all were fine. Hed tested the car and got no cels'. The next day I took her out and got the cel over and over. So I called him, we talked and then he suggested checking the hoses up top. So I l;ooked arround under the hood and found that the air ram on the right throttlebody had slipped out of the rubber collar (some how the hose clamp sliiped off of the collar) and was just sorta hanging on half off, half on. I reconnected it, tightened the clamp, very well, and started her up. Purred like a kitten, idle was silky smooth again, no cels and no more pumping sound. It was an air leak, the thottlebody was sucking unmonitered air! Any way do check for an air leak.