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1989 Chevy van with 305 and there is no vacuum coming from the egr vacuum is good at the throttle body though what could be the cause of this?
There is no vacuum at the nipple on the EGR VALVE.
The Vacuum line that hooks to it should suck your finger when you speed the engine up. That line will come from the TBI ( Throttle Body Injection housing) and hook to the EGR valve, and when the engine RPMs. go up it sucks the EGR VALVE OPEN.
UNDERSTAND.
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350 fuel injected Chevy idles to high?
Check for a vacuum leak or sticking butterfly valve at the throttle body, or possibly a sticking throttle linkage or throttle cable.
Where is the map sensor located on a 1995 Chevy 350 throttle body?
Passenger side of engine next to throttle body. It is the senor with the vacuum line running to it.
Where does a 87 Chevy 305 map sensor vacuum line connect?
on the back of the throttle body or intake port.
What is the barometric pressure circuit on a 88 Chevy tbi 350?
It is commonly referred to as the Manifold Absolute Pressure (MAP) sensor. It is simply a small black sensor box with a vacuum source coming from above the vacuum source on the throttle body and a wiring plug that goes to the ECM.
Where should the vacuum advance be connected to on a 350 Chevy with a 2 barrel carb?
Look on the carb for a small vacuum source above the throttle body. You would want one that has no vacuum at idle.
Where is an air filter located in a Chevy Malibu?
at end of hose coming from throttle body,or carb.
Vacuum advance hook up on 63 Chevy 283 engine?
There should be a vacuum source on the carb above the throttle body that gives spark ported vacuum. You can connect a tube from this source to the distributor.
Where is the egr valve on 1994 Chevy S-10 6 cylinder 4.3?
it is behind the throttle body, it will have a vacuum line going to it
1974 Chevy 350 vacuum line diagram?
You'd need a constant source such as manifold or throttle body vacuum for power brakes, pcv, and disappearing headlights, and a spark-ported source such as one you'd find above the throttle body for the distributor.
Would the throttle position sensor cause a 2000 Chevy blazer to rev too high and act as though its not shifting properly The engine is bogging down and loosing power?
Sounds more like you have a large vacuum leak to me.
What causes engine to idle high in a 1987 Chevy S-10?
vacuum leak, check the gasket under the throttle body for a vacuum leak. Spray some carb cleaner around the base of the throttle body while the engine is running. If there is a vacuum leak you will hear a change in the rpm's when you hit the right spot.
Why could cause a 1996 Chevy Cavalier to idle high after fixing a warped head?
You probably have a vacuum leak. Check intake manifold and throttle body gaskets as well as vacuum lines.
