Reconnect the 8 fuel injector wires reconnect the fuel vapor line to the drivers front side of the intake manifold reconnect any throttle body sensors throttle cables maf and air intake setup.
Ls1 throttle body vacuum lines.
The blue one is connected to the upper radiator hose on the dirvers side where the large hose has a y split and the smaller hose connects to the throttle body on that side.
Hey guys i ve swapped a ls1 into my 73 camaro and have a question about the map sensor vacuum lines.
If you have a big vacuum leak you can often experience a rough high or low idle rpm.
The two remaining fittings on either side of the t b i capped off with vacuum line caps 1 4 inch.
On the bottom of the throttle body there is are coolant line fittings going in and out.
Fresh air inlet to the valve cover needs to be routed in front of the throttle blade or the steel elbow in pic 2.
For summer time use can you bypass the coolant lines.
Pcv valve needs full engine vacuum.
The intake manifold connects the.
The hoses can dry out and crack also the nylon vacuum line from the control solenoid right hand side of the intake manifold to the vapor canister has a x 1 rubber hose glued to the end.
The enlarged bore sizes allow for increased airflow to support your higher horsepower needs a progressive throttle.
What i finally had to do was molest every single vacuum line and lines i thought were vacuum lines until i found that it was the one right under my nose.
The rubber elbow that joins the maf and throttle body.
If you have a major vacuum leak the throttle body will get problems trying to control it and it will result in strange idle symptoms.
Those fittings are connected to coolant lines that has coolant running through the bottom of the throttle body they are not vacuum lines.
Ls1 map sensor brake vacuum line.
Run it to the the lower port in pic 2 or the evap port in pic 6.
The elbow wasnt cheap to replace either but was cheaply made and every autoparts store wanted 30 00 for it.
Vacuum booster to the brake hooks up to the big nipple on the very rear of the intake manifold right by the map.
The engine was rated at 345 350 horses in the corvette depending on model year and would check in at as much as 325 hp in the f body cars.
Its all aluminum architecture made it significantly lighter than past gm v8s and power was great.
In the case on the ls1 the t b never touches the engine block.
As a starting point the ls1 was an eye opener for chevy fans.
Sniper efi s new 92mm and 102mm billet aluminum ls throttle bodies give you a great way to improve engine performance without breaking the bank.
On an f body reconnect the throttle cable bracket and tighten the 2 bolts to 89inch pounds.
This is a discussion on ls1 map sensor brake vacuum line within the general help forums part of the lsx technical help section category.
This is because the throttle body is trying to get a stable idle by opening and closing the throttle.
