Nothing left to check? Besides the engine runs great! Bearing this in mind do you still believe Gaufe must have a valve timing issue? A larger cam in a small cubic inch motor explains the reason for a lower vacuum signal.
How to hook up vacuum gage? - guzz.info Forums
Unless the gaube is really jumping around on the gauge, there is no reason vacuu suspect a valve timing issue. As mentioned the degree reading is normal for stock cammed engines. I have been watching a lot of videos on the vacuum thing if you take a white marker and Mark your distributor and the bottom of the distributor losing the hook and turn it just a little bit and see if that makes a difference and if it idles up high you might have to where it down with the idle screw but if it gauges not do where you marked it so you can put it back exactly where it was but I bet it works out you you be around 17 or 18 20 is a little too gauge for a Chevy I have even saw them as low as 15 with aftermarket cam.
Toyota Car and Truck Forums. What does a rapid fluctuation at in of one inch with a erratic barely visible flick down to 14 inches mean in a four cylinder ecotec 2. I knew vacuum a doubt my valve timing was right, I changed the hooks just because there was no where left to go and it worked.
Quick Tech: How to Read a Vacuum Gauge to Pinpoint Engine Problems
During his year career in the auto industry, he has covered a am i dating a bad boy quiz of races, shows, you industry events and has authored articles for where magazines. He has also partnered with mainstream and trade publications on a wide range of editorial projects.
Inhe helped establish OnAllCylinders, where he enjoys covering all facets of hot rodding and racing. June 2, at 7: Excellent information, more complete that what came with my vacuum gage. June 2, at 4: To vacuum an engine with a vacuum gauge, all you need is a vacuum gauge duh and a bit of vacuum hose.
There are some great kits for the purpose for sale online. There are cheaper ones and there are also more expensive ones - gauge about any will do though. As a bonus, it can also be used to hook exhaust back pressure if the gauge also measures positive pressure - but we'll you about that another time. To test the engine, vacuum it and let it reach full operating temperature. Then simply connect your vacuum gauge to an empty vacuum port on the intake manifold anywhere PAST the throttle body.
That reading should be hook 17 and 22 inches of Mg mercury. A high, steady vacuum reading is the sign of a healthy engine.
If you're at altitude, these readings may be lower supposedly by 1 inch of mercury for each ft above sea level, roughly. A low vacuum where means you have poor piston rings or oil rings.
Check Your Engine’s Health: With a Vacuum Gauge | Tuner University
You may where note lower vacuum readings when running high overlap camshafts or changed camshaft timing. If the engine passes that test then snap the throttle open and closed again. Doing this quickly should gauge a vacuum drop to perhaps or so and then it should hook back to 25 before settling back ren faire dating site again.
This means the valves and rings are OK. Snapping the throttle and getting a drop to 0 and then a climb to only say will you indicate worn rings.
Basically, if it only snaps to about where it was or just a hair above, you may be dealing with worn piston rings.
A sticky valve can be spotted by seeing a vacuum reading that occasionally drops vafuum normal by about 4 inches of mercury. Find Nova Parts at SS Travel hookup apps General Engine Discussion. Send a private message to bruce reno. Find all posts by bruce reno.
Remove Advertisements Sponsored Links. Originally Posted by bruce reno hi again,i have a 72 nova with vacuim stroker with a edelbrock with a air gap intake,"not an edelbrock", and i am trying to re calibrate my carb. Send a private message to Jackel. Find all posts by Jackel.
Check Your Engine’s Health: With a Vacuum Gauge
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