shorook90
New Member
I just got my new 49-state intake manifold the other day. Post to buying the manifold I take off my egr vavle and start it up with my finger on that hole. well there is a ton a pressure on my finger but the secondaries still do not close.I just read this "1. NORMAL READING: Needle between 51-74 kPa (15-22 in-Hg) and holding steady.
2. NORMAL READING DURING RAPID ACCELERATION AND DECELERATION: When engine is rapidly accelerated (dotted needle), needle will drop to a low (not to zero) reading. When throttle is suddenly released, the needle will snap back up to a higher than normal figure.
3. NORMAL FOR HIGH-LIFT CAMSHAFT WITH LARGE OVERLAP: Needle will register as low as 51 kPa (15 in-Hg) but will be relatively steady. Some oscillation is normal.
4. WORN RINGS OR DILUTED OIL: When engine is accelerated (dotted needle), needle drops to 0 kPa (0 in-Hg). Upon deceleration, needle runs slightly above 74 kPa (22 in-Hg).
5. STICKING VALVES: When the needle (dotted) remains steady at a normal vacuum but occasionally flicks (sharp, fast movement) down and back about 13 kPa (4 in-Hg), one or more valves may be sticking.
6. BURNED OR WARPED VALVES: A regular, evenly-spaced, downscale flicking of the needle indicates one or more burned or warped valves. Insufficient hydraulic valve tappet clearance will also cause this reaction.
7. POOR VALVE SEATING: A small but regular downscale flicking can mean one or more valves are not seating.
8. WORN VALVE GUIDES: When the needle oscillates (swings back and forth), over about a 13 kPa (4 in-Hg) range at idle speed, the valve guides could be worn. As engine speed increases, needle will become steady if guides are responsible.
9. WEAK VALVE SPRINGS: When the needle oscillation becomes more violent as engine rpm is increased, weak valve springs (6513) are indicated. The reading at idle could be relatively steady.
10. LATE VALVE TIMING: A steady but low reading could be caused by late valve timing.
11. IGNITION TIMING RETARDING: ******** ignition timing will produce a steady but somewhat low reading.
12. INSUFFICIENT SPARK PLUG GAP: When plugs are gapped too close, a regular, small pulsation of the needle can occur.
13. INTAKE LEAK: A low, steady reading which can be caused by an intake manifold or throttle body mounting ****** gasket leak.
14. BLOWN HEAD GASKET: A regular drop of fair magnitude can be caused by a blown head gasket (6051) or warped head-to-block surface.
15. RESTRICTED EXHAUST SYSTEM: When the engine is first started and is idling, the reading may be normal but as the engine rpm is increased, the back pressure caused by a clogged muffler (5230), kinked tail pipe or other concerns, will cause the needle to slowly drop to zero. The needle then may slowly rise. Excessive exhaust clogging will cause the needle to drop to a low point even if the engine is only idling.
When vacuum leaks are indicated, pinpoint and correct the cause. Excess air leaking into the system will upset the fuel mixture and cause concerns such as rough idle, missing on acceleration or burned valves. If the leak exists in the power brake, the system will not function correctly. ALWAYS FIX VACUUM LEAKS." Aside from the leak(which there is none. could any of these things cause my secondaries not to close. Just changed the t-stat, plugs, valve cover gaskets, plug well seals,and a new computer. I have not started it with the new items due to a broken t-stat housing stud. Please help guys! Its driving me crazy. On a bright side though- I went to famoso race way the other day and ran a [email protected]. With a reaction time of .571<----- best of the night w/ 400+ cars and my first time draging it! 60'-2.914, 330'-7.427,1/[email protected],1000'-14.346. I know I shouldn't have but I couldn't resist. Thanks everyone.
2. NORMAL READING DURING RAPID ACCELERATION AND DECELERATION: When engine is rapidly accelerated (dotted needle), needle will drop to a low (not to zero) reading. When throttle is suddenly released, the needle will snap back up to a higher than normal figure.
3. NORMAL FOR HIGH-LIFT CAMSHAFT WITH LARGE OVERLAP: Needle will register as low as 51 kPa (15 in-Hg) but will be relatively steady. Some oscillation is normal.
4. WORN RINGS OR DILUTED OIL: When engine is accelerated (dotted needle), needle drops to 0 kPa (0 in-Hg). Upon deceleration, needle runs slightly above 74 kPa (22 in-Hg).
5. STICKING VALVES: When the needle (dotted) remains steady at a normal vacuum but occasionally flicks (sharp, fast movement) down and back about 13 kPa (4 in-Hg), one or more valves may be sticking.
6. BURNED OR WARPED VALVES: A regular, evenly-spaced, downscale flicking of the needle indicates one or more burned or warped valves. Insufficient hydraulic valve tappet clearance will also cause this reaction.
7. POOR VALVE SEATING: A small but regular downscale flicking can mean one or more valves are not seating.
8. WORN VALVE GUIDES: When the needle oscillates (swings back and forth), over about a 13 kPa (4 in-Hg) range at idle speed, the valve guides could be worn. As engine speed increases, needle will become steady if guides are responsible.
9. WEAK VALVE SPRINGS: When the needle oscillation becomes more violent as engine rpm is increased, weak valve springs (6513) are indicated. The reading at idle could be relatively steady.
10. LATE VALVE TIMING: A steady but low reading could be caused by late valve timing.
11. IGNITION TIMING RETARDING: ******** ignition timing will produce a steady but somewhat low reading.
12. INSUFFICIENT SPARK PLUG GAP: When plugs are gapped too close, a regular, small pulsation of the needle can occur.
13. INTAKE LEAK: A low, steady reading which can be caused by an intake manifold or throttle body mounting ****** gasket leak.
14. BLOWN HEAD GASKET: A regular drop of fair magnitude can be caused by a blown head gasket (6051) or warped head-to-block surface.
15. RESTRICTED EXHAUST SYSTEM: When the engine is first started and is idling, the reading may be normal but as the engine rpm is increased, the back pressure caused by a clogged muffler (5230), kinked tail pipe or other concerns, will cause the needle to slowly drop to zero. The needle then may slowly rise. Excessive exhaust clogging will cause the needle to drop to a low point even if the engine is only idling.
When vacuum leaks are indicated, pinpoint and correct the cause. Excess air leaking into the system will upset the fuel mixture and cause concerns such as rough idle, missing on acceleration or burned valves. If the leak exists in the power brake, the system will not function correctly. ALWAYS FIX VACUUM LEAKS." Aside from the leak(which there is none. could any of these things cause my secondaries not to close. Just changed the t-stat, plugs, valve cover gaskets, plug well seals,and a new computer. I have not started it with the new items due to a broken t-stat housing stud. Please help guys! Its driving me crazy. On a bright side though- I went to famoso race way the other day and ran a [email protected]. With a reaction time of .571<----- best of the night w/ 400+ cars and my first time draging it! 60'-2.914, 330'-7.427,1/[email protected],1000'-14.346. I know I shouldn't have but I couldn't resist. Thanks everyone.
