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what is this?

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Old 09-11-2017, 07:19 AM   #1
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Car: 1987 Trans am GTA
Engine: 5.7 liter
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what is this?


unknown part

so, after being up on jack stands for the past few months I finally pulled the old bird out of the garage last night, she is running really rough, I know it needs new plugs, wires ect but while I was looking for the cause of the rough idle (which leads to the car dying after about 2-5 minutes) I noticed this part which has a couple of vacuum lines on it that are not going anywhere. which leads to 2 questions, 1- what is this part? and 2- could this be causing the rough idle?
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Old 09-11-2017, 07:44 AM   #2
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Car: 1987 Trans Am
Engine: 305 TPI

Re: what is this?

Should be the EGR solenoid, one line goes to the EGR under the plenum. The other I believe runs up to the throttle body where it splits off the the charcoal canister as well
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Old 09-12-2017, 04:05 PM   #3
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Car: 1967 Camaro, 91 z28
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Re: what is this?

it mounts on the ignition coil and lower mounting bracket.
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Old 09-12-2017, 04:23 PM   #4
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Location: cincinnati ohio
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Car: 1987 Trans am GTA
Engine: 5.7 liter
Transmission: 700r4
Axle/Gears: 3.27

Re: what is this?

are you sure? it seems like that bracket just kinda hanging there is working pretty well lol. thank you guys, hope to get this straightened out with the rest of my vacuum system now that I have a new vacuum canister without a hole in it
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Old 09-12-2017, 04:30 PM   #5
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Join Date: Dec 2016
Location: cincinnati ohio
Posts: 105
Car: 1987 Trans am GTA
Engine: 5.7 liter
Transmission: 700r4
Axle/Gears: 3.27

Re: what is this?

so I'm assuming this is probably the cause of the rough idle/ slow painful sounding dying? lol
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Old 09-14-2017, 04:04 AM   #6
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Car: 1986 IROC Z-28
Engine: OEM 305
Transmission: Rebuilt TH700R4 with B&M 70235
Axle/Gears: 4th Gen 10 bolt Eaton Truetrac 3.23

Re: what is this?

Could be bad gas, especially if you have 93/94 octane in your tank and it has been sitting more than 3 months. Toss in a few gallons of fresh fuel and see if that helps.
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