Can Improper valve lash give less air for combustion?
#1
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Joined: Jan 2003
Posts: 2,043
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From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Can Improper valve lash give less air for combustion?
My car is just drinking gasoline. Code 45 is being set whenever I look at the car. I just replaced head gaskets and got to thinking last night that what if the injectors are fine (long story, in one of my multiple posts, actually going to check fuel pressure in a couple hours to make sure)
.....but what if they are fine. What else would cause so much blackness. Then I thought well air is needed to make combustion and maybe the valve lash really does need to be adjusted a 3rd time, but this time properly and not the whole 'tighten until the pushrod doesn't move up and down, and then give another 1/4 turn' but actually turn the car on with valve covers off and tighten as it runs. But would impropper valve lash decrease air flow? Or no?
.....but what if they are fine. What else would cause so much blackness. Then I thought well air is needed to make combustion and maybe the valve lash really does need to be adjusted a 3rd time, but this time properly and not the whole 'tighten until the pushrod doesn't move up and down, and then give another 1/4 turn' but actually turn the car on with valve covers off and tighten as it runs. But would impropper valve lash decrease air flow? Or no?
#2
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From: Macedonia ,OH
Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
Ehh, I would vote bad injectors. I've seen code 45 and injectors being link for quit a few years now. If you worried about valve lash, adjust them with the car running. Its the best and easiest way.
#3
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Supreme Member
Joined: Jan 2003
Posts: 2,043
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From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Well the injectors were the 1st things I thought when I saw multiple 45's. But, then I thought well maybe there isn't enough air and maybe I still didn't set the timing right to TDC on #1. I need to do that first and foremost.
But anyway, the readings from the FP gauge is that it holds pressure. 1.5 hours afterwards it was still around 32-34psi. Now, almost 4 hours afterwards it's around 17psi.
But anyway, the readings from the FP gauge is that it holds pressure. 1.5 hours afterwards it was still around 32-34psi. Now, almost 4 hours afterwards it's around 17psi.
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05-10-2023 07:19 PM