dyetrying91
10+ Year Contributor
- 105
- 1
- Jul 2, 2009
-
North Haven,
Connecticut
I posted a thread about 2 weeks ago and got some decent help, since then, I have an update, and a few more questions.
Basically, I have low vacuum at idle, idle walks around like crazy when hot, (650-2100), it's not idle surge. I'm pretty sure the idle issue is my TPS being out of adjustment.
Despite the low vacuum, it misses at idle, fairly bad, below is a video I took of the problem..
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Here is one more video I took after a brief stint at 80 or so on the highway,
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Don't mind the oil pressure gauge not working, the wire caught a piece of road debris under the car.
Since I posted the last thread, I have done the following:
1. Boost leak test, only found 2 small leaks @ 32 psi. One at the TB seal and another at the BoV.
2. Compression was 141, 161, 158, 160 on a dry test. I have reason to believe that the cylinder 1 ring is getting worn, its at 94k miles on the stock block and it was running 18psi on an 18g for quite some time.
3. Checked mechanical timing, everything looked perfect.
4. Changed plugs/wires, tried both 6's and 7's. Have 7s in it now.
5. Found a small exhaust leak at the manifold/head from a missing manifold bolt, replacing it tonight.
I'm completely at a loss here as to what it could be. The head has less than 1000 miles on it and came off of a running car. Any help is greatly appreciated.
-Dave
Basically, I have low vacuum at idle, idle walks around like crazy when hot, (650-2100), it's not idle surge. I'm pretty sure the idle issue is my TPS being out of adjustment.
Despite the low vacuum, it misses at idle, fairly bad, below is a video I took of the problem..
<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/uSpbfP_0Cr0?fs=1&hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/uSpbfP_0Cr0?fs=1&hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>
Here is one more video I took after a brief stint at 80 or so on the highway,
<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/xmequfF6YS4?fs=1&hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/xmequfF6YS4?fs=1&hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>
Don't mind the oil pressure gauge not working, the wire caught a piece of road debris under the car.
Since I posted the last thread, I have done the following:
1. Boost leak test, only found 2 small leaks @ 32 psi. One at the TB seal and another at the BoV.
2. Compression was 141, 161, 158, 160 on a dry test. I have reason to believe that the cylinder 1 ring is getting worn, its at 94k miles on the stock block and it was running 18psi on an 18g for quite some time.
3. Checked mechanical timing, everything looked perfect.
4. Changed plugs/wires, tried both 6's and 7's. Have 7s in it now.
5. Found a small exhaust leak at the manifold/head from a missing manifold bolt, replacing it tonight.
I'm completely at a loss here as to what it could be. The head has less than 1000 miles on it and came off of a running car. Any help is greatly appreciated.
-Dave