L-jet question on my'74 |
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L-jet question on my'74 |
ricardo |
Nov 19 2016, 02:45 PM
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#1
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Newbie Group: Members Posts: 47 Joined: 9-November 16 From: Lakeview, NY Member No.: 20,572 Region Association: North East States |
Got my car running recently and I have a few problems.
It seems that the car runs if I disconnect the decel valve hose that goes to the air sensor. If I close of the opening at the air sensor, the car stalls. My thinking is the car is only running because its getting air through the hose opening, and not through air sensor. I tested the air sensor terminals as per the Haynes manual and got the following: Terminal 6 and 9 284 ohms Range 200 to 400 Terminal 7 and 8 153 ohms Range 120 to 400 Anyone have any idea whats going on? |
TheCabinetmaker |
Nov 19 2016, 02:48 PM
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#2
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Don't you already have a thread on this topic? Why post two?
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ricardo |
Nov 21 2016, 09:26 AM
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#3
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Newbie Group: Members Posts: 47 Joined: 9-November 16 From: Lakeview, NY Member No.: 20,572 Region Association: North East States |
Got my car running recently and I have a few problems. It seems that the car runs if I disconnect the decel valve hose that goes to the air sensor. If I close of the opening at the air sensor, the car stalls. My thinking is the car is only running because its getting air through the hose opening, and not through air sensor. I tested the air sensor terminals as per the Haynes manual and got the following: Terminal 6 and 9 284 ohms Range 200 to 400 Terminal 7 and 8 153 ohms Range 120 to 400 Anyone have any idea whats going on? Somebody know what's going on? Anybody? |
malcolm2 |
Nov 21 2016, 10:29 AM
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#4
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
OEM vacuum layout.
I took my DECEL valve out and have this.... I folded the OLIVE hose over and plugged it. Now mine looks like this.... I am not use I follow your problem. What is an air sensor? Is it in either layout? |
Dave_Darling |
Nov 21 2016, 10:33 AM
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#5
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
You can check if air is going into the engine--just put your hand over the intake snorkel. You should feel the air getting drawn in.
Unplugging one of the hoses that is "downstream" of the air-flow meter will give you a lean mixture. Air that gets drawn in through that open hose (or the open fitting the hose had been plugged into, as in this case) is not measured by the AFM so the FI doesn't "know about" it and doesn't add fuel to account for it. You either have a rich mixture, and adding umetered air is getting it somewhere near the correct value, or you have some other problem that is dragging the motor's RPM down and letting more air in (even though the mixture is off) is helping it to run. You can check for the latter case by opening the throttle. Any idea how the mixture is? Lean or rich? A wide-band O2 meter will tell you. --DD |
ricardo |
Nov 21 2016, 10:42 AM
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#6
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Newbie Group: Members Posts: 47 Joined: 9-November 16 From: Lakeview, NY Member No.: 20,572 Region Association: North East States |
You can check if air is going into the engine--just put your hand over the intake snorkel. You should feel the air getting drawn in. Unplugging one of the hoses that is "downstream" of the air-flow meter will give you a lean mixture. Air that gets drawn in through that open hose (or the open fitting the hose had been plugged into, as in this case) is not measured by the AFM so the FI doesn't "know about" it and doesn't add fuel to account for it. You either have a rich mixture, and adding umetered air is getting it somewhere near the correct value, or you have some other problem that is dragging the motor's RPM down and letting more air in (even though the mixture is off) is helping it to run. You can check for the latter case by opening the throttle. Any idea how the mixture is? Lean or rich? A wide-band O2 meter will tell you. --DD Thanks guys i'll give your suggestions a try |
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