cut pipes under car?
#1
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Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
cut pipes under car?
Hi all
We put on the lift the car I'm about to buy. We saw that some pipes was cut and "sewed". Mechanic said it could be the exhaust gas recirculation pipes, cut to improve performances.
Question is: what are actually those pipes about?
There you have a picture I made (from another car). I dont remember the exact cut point, so I drew two circles.
Seeing those pipes cut is a good sign, or a bad sign, in terms of reliability and parts duration?
THANKS VERY MUCH
We put on the lift the car I'm about to buy. We saw that some pipes was cut and "sewed". Mechanic said it could be the exhaust gas recirculation pipes, cut to improve performances.
Question is: what are actually those pipes about?
There you have a picture I made (from another car). I dont remember the exact cut point, so I drew two circles.
Seeing those pipes cut is a good sign, or a bad sign, in terms of reliability and parts duration?
THANKS VERY MUCH
#2
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
Those are fuel lines and I think brake lines. If they have been cut/put back together you may want to ask the owner why it was done.
Could be as simple as them repairing a line that had a leak.
If your mechanic thinks those are emissions lines, you may need a better mechanic.
EGR lines go from the exhaust manifold, to the valve, then to the intake. No emissions lines run back that far. Except for the smog pump but those run to the catalytic converter.
Could be as simple as them repairing a line that had a leak.
If your mechanic thinks those are emissions lines, you may need a better mechanic.
EGR lines go from the exhaust manifold, to the valve, then to the intake. No emissions lines run back that far. Except for the smog pump but those run to the catalytic converter.
#3
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Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
Re: cut pipes under car?
oh really??
It cannot be. That car runs good And brakes work.
It gotta be something else. I precisely remember two cut cables ad the mid of the car below that neither the owner knew why.
It cannot be. That car runs good And brakes work.
It gotta be something else. I precisely remember two cut cables ad the mid of the car below that neither the owner knew why.
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Car: 91 formula ws6
Engine: 355 tpi OBDII
Transmission: 4l60E
Axle/Gears: 2.73 with 4th gen brakes
Maybe the emissions vapor lines? The man above is correct, those are brake and fuel. They rot and you can cut and replace sections. Myself, I just run new lines. The under of that car is cleaner then both of mine!
#5
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Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
Re: cut pipes under car?
dunno what to say. I'll post some pictures of that car in the next days and we will see
thanks
thanks
#6
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Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: cut pipes under car?
Those lines are:
Fuel supply
Fuel return
EVAP vapour
Rear hydraulic brake
If only a section of one or more was replaced, most likely reason is rust repair. Second reason might be that they were crushed by road hazard or misplaced lifting jack.
Fuel supply
Fuel return
EVAP vapour
Rear hydraulic brake
If only a section of one or more was replaced, most likely reason is rust repair. Second reason might be that they were crushed by road hazard or misplaced lifting jack.
#7
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Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
Re: cut pipes under car?
So it's impossible that any of those lines was cut somehow to improve performance?
==> that cut means a trouble?
==> that cut means a trouble?
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#8
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
Doesn't really mean trouble, you just don't know why they were cut.
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
They are NOT EGR lines. I can say that definitively. They are fuel and brakes.
The egr runs from the exhaust manifold to the intake, they would NEVER run them under the car.
Fuel and brake lines and that is it. Whoever is feeding you that information doesn't know what the hell they are talking about.
Why would the EGR run to the rear brakes and fuel tank when its meant to go straight to the intake?
Exhaust Gas Recirculation. It goes straight from the header, to the intake manifold AND NOWHERE ELSE.
Smog lines run from the cat to the headers.
The only emissions hose in that bundle is the evap line that runs from your gas tank to charcoal canister.
The egr runs from the exhaust manifold to the intake, they would NEVER run them under the car.
Fuel and brake lines and that is it. Whoever is feeding you that information doesn't know what the hell they are talking about.
Why would the EGR run to the rear brakes and fuel tank when its meant to go straight to the intake?
Exhaust Gas Recirculation. It goes straight from the header, to the intake manifold AND NOWHERE ELSE.
Smog lines run from the cat to the headers.
The only emissions hose in that bundle is the evap line that runs from your gas tank to charcoal canister.
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Car: '84 Camaro Z28
Engine: 305 HO
Re: cut pipes under car?
EGR lines? I'm wondering what lines an EGR valve would need that run to the back of the car. I've never heard of anything like this, before.
The EGR valve is used to reduce NOx emissions in an engine, and the EGR valve is installed on the intake. It opens during cruising speeds, and it directs a portion of the exhaust back into the intake for reburning. (I may not have worded that correctly. Surely, I've oversimplified this explanation.)
Removing it won't improve performance. That is, unless there's something wrong with it. A bad EGR valve will cause an engine to idle rough to the point of stalling. You can remove it, but if the engine needs to go through emissions testing, it won't pass. If you do remove it, you'll need to cap the ports on the intake.
The EGR valve is used to reduce NOx emissions in an engine, and the EGR valve is installed on the intake. It opens during cruising speeds, and it directs a portion of the exhaust back into the intake for reburning. (I may not have worded that correctly. Surely, I've oversimplified this explanation.)
Removing it won't improve performance. That is, unless there's something wrong with it. A bad EGR valve will cause an engine to idle rough to the point of stalling. You can remove it, but if the engine needs to go through emissions testing, it won't pass. If you do remove it, you'll need to cap the ports on the intake.
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Car: '84 Camaro Z28
Engine: 305 HO
Re: cut pipes under car?
They are NOT EGR lines. I can say that definitively. They are fuel and brakes.
The egr runs from the exhaust manifold to the intake, they would NEVER run them under the car.
Fuel and brake lines and that is it. Whoever is feeding you that information doesn't know what the hell they are talking about.
The egr runs from the exhaust manifold to the intake, they would NEVER run them under the car.
Fuel and brake lines and that is it. Whoever is feeding you that information doesn't know what the hell they are talking about.
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
If you want to cut them to "increase engine performance" go ahead. We will not be visiting you in the hospital. We will not attend your funeral. The moment you cut that fuel line you can kiss your *** goodbye. Same goes for the brake lines.
Last edited by willexoIX; 11-27-2014 at 08:15 PM.
#14
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Car: '84 Camaro Z28
Engine: 305 HO
Re: cut pipes under car?
He may have meant EVAP lines. Although, there is usually one line for the EVAP system that runs from the charcoal canister to the gas tank. Those other lines are brake lines and fuel lines. Those are definitely not EGR lines.
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The car will run okay without the EVAP vapor line. You can get by without the return line if it has been converted to carburetor and a mechanical fuel pump (not likely). If the car is otherwise unmodified from stock, I would guess they were repaired.
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Car: 1989 IROC-Z / T-Top -1987 GTA
Engine: 305 (LO3) _350 (L98)
Transmission: 700R4 _ 700R4
Axle/Gears: 2.73 L.S. - ???
Re: cut pipes under car?
sounds like the po dropped the tank (and didnt know what they were doing) that would explain why the e brake cables and fuel lines were cut ... just a guess
#21
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Car: 1987 Trans AM WS6
Engine: 305 TPI
Transmission: TH700R4 Stock
Axle/Gears: 3.08 LSD
Re: cut pipes under car?
Those cut lines could probably be the Evaporative Emission Control ( EEC ) ones.
Here's the FUEL SUPPLY & EMISSION DIAGRAM FOR A 89 GTA w/L98 TPI engine:
http://www.tonkinonlineparts.com/sho...rimLevel=19889
Here's the FUEL SUPPLY & EMISSION DIAGRAM FOR A 89 GTA w/L98 TPI engine:
http://www.tonkinonlineparts.com/sho...rimLevel=19889
#22
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Car: 89 Camaro RS running MS2X
Engine: .48/.60AR T3/T4 2.8L V6
Transmission: Rebuilt 700R4 2500 stall
Axle/Gears: Next to break...
Those cut lines could probably be the Evaporative Emission Control ( EEC ) ones.
Here's the FUEL SUPPLY & EMISSION DIAGRAM FOR A 89 GTA w/L98 TPI engine:
http://www.tonkinonlineparts.com/sho...rimLevel=19889
Here's the FUEL SUPPLY & EMISSION DIAGRAM FOR A 89 GTA w/L98 TPI engine:
http://www.tonkinonlineparts.com/sho...rimLevel=19889
#23
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Re: cut pipes under car?
He's in Italy, and he wants to listen to his mechanic who thinks they are EGR lines. That's fine, he doesn't need to listen to avid enthusiasts online. Maybe the mechanic thinks EGR stands for Egregious Generation of Revenue...
#24
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Car: 1989 Gray ttop GTA
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Re: cut pipes under car?
Im going to post here some pictures that I should be able to take the next week, when I'll take the car to the mechanic :/
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