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1992 astro 4.3L v6 how do change the cmfi fuel pump relaythat is some where under the dashboard you cantfind it?
1992 Chevy astro 4.3L v6 how do you change the cmfi fuel pnmp relay that is some where under the dashboard i cant find it, can you help,
Is there a fuel pressure regulator on a throttle body 4.3 v6 1994 Chevrolet astro?
made into the cmfi
How can you find a replacement prom for 1994 Astro CMFI?
JUNKYARD. to expensive to buy new,good weekend trip to a junk yard you can get 2 pay for one pocket the other ,its a score either way.
Where is the crankshaft position sensor located on a 1994 olds bravada with a 4.3L vortec CMFI injection system?
On the engine front cover perpendicular to the crankshaft target wheel. CMFI engines should read a 800 to 1200 ohms. Also check for voltage coming from the PCM not sure what voltage should be but my guess is 5 volts
How can you check if the fuel injectors are clogged in a 1993 jimmy 4.3 vortec?
With engine warmed up, running and air filter assembly removed, notice the fuel spray coming from the injectors. You should see a nice umbrella shaped spray coming from each injector. If the spray is dripping you may have injector problems. Also, the CMFI unit for this motor has a long history of failure, leaking. I have replaced my CMFI unit, twice. Rough idle and a long pressure fill (turning the motor over before it finally pressurizes to start) are the key indicators that the unit is bad.
Where is the location of a crankshaft sensor on a Chevy S-10 1994 4.3?
The Crankshaft Sensor on the 4.3 CMFI and CSEFI engines can be found on the front timing chain cover of the engine. It is best accessed from under the front of the vehicle.
Where is the fuel pressure regulator on a 2001 Chevy 1500 express van 4.3?
on a 2001 4.3L V6 engine with a Central Sequential Fuel Injection (CSFI) system, it is located on the side of the fuel meter body, which is located inside composite plastic, upper intake manifold. You have to remove the upper intake manifold on both CMFI and CSFI systems to get to the fuel pressure regulator. Before you start pulling it apart you need to grab a multimeter and start testing everything first to rule out other things. Release pressure in the system before removing anything. Press the needle on the schrader valve with a screwdriver to release pressure, but put a rag over it or you'll get fuel on your carpet. You can take the fuel filter off and turn the ignition to ON to see if the fuel pump energizes. You can pull a spark plug off and crank the motor to check if there's spark. Spark means the crankshaft position sensor, ignition module, etc. are working. Reconnect the fuel filter and turn the ignition back to ON. If the fuel system doesn't energize you may possibly have to change the fuel pressure regulator. Just remember to inspect the rubber gasket that goes under the plastic intake manifold, or replace the gasket if you have the CMFI. Test the wiring harness above the fuel tank, they usually get corrosion after 10 years and can cause a short in the system. Test the resistance on the Idle Air Control Valve. The IAC valve is located on the side of the throttle body. The resistance should be 40 to 80 ohms for each check. If not, replace the IAC valve. I hope its something as simple as the vacuum line on the fuel pressure regulator. Good luck
Fuel pressure 1996 Chevy 1500 4.3L?
There is 3 types of fuel injection TBI (Throttle Body Injection One Injector) 9 to 13 PSI CMFI (Central Multiport Fuel Injection) 58 to 64 PSI CSEFI (Central Sequential Electronic Fuel Injection) 55 to 61 PSI
Why is 1994 gmc s15 jimmy with 4.3 cmfi blowing fuel out exhaust new fuel pump just installed?
Well I will tell u right away the spider assembly underneath the intake manifold is bad Auto zone has best price but it is still 350 dollars easy to install bad for the pocket priceblaster411@hotmail.com is my email send me one if u have more questions i can explain more
Fuel pressure for 1998 sonoma?
Throttle Body Injection (TBI) Aprox. 9 - 13 psi with key on, not running and a 3 -10 psi drop when running at idle. Multiport Fuel Injection (MFI) Aprox. 41 -47 psi with key on, not running and a 3 -10 psi drop when running at idle. Central Multiport Fuel Injection (CMFI) Aprox. 58 -64 psi with key on, not running and a 3 -10 psi drop running at idle. Central Sequential Electronic Fuel Injection (CSEFI) Aprox. 55 -61 psi with key on, not running and again the 3 -10 psi drop running at idle.
What are timing specs for 1991 Chevy v6 4.3l?
1991 4.3L V6 {| ! colspan="4" bgcolor="#000000" | ! colspan="3" bgcolor="#00FFFF" | ! bgcolor="#00FFFF" | | Camshaft Sprocket-to-Camshaft Bolts 21 ft. lbs. Camshaft Thrust Plate Bolts 105 inch lbs. Crankshaft Damper Bolt 70 ft. lbs. Cylinder Head Bolts (Fig. 1) 65 ft. lbs. (Must be torqued in right order, won't let me put the diagram up) (looking from side, Top Row 12-8-4-5-1-9-13 Bottom Row 11-7-3-2-6-10) Engine Mount-to-Engine Bolts 35 ft. lbs. Engine Mount-to-Frame Bolts 52 ft. lbs. Engine Mount Through Bolts 61 ft. lbs. Nuts 52 ft. lbs. Exhaust Manifold BoltsNon Turbo Engine All Bolts (Except center 2 bolts) 20 ft. lbs. Center 2 Bolts 26 ft. lbs. Turbo Engine (All Bolts) 33 ft. lbs. Flywheel Bolts 75 ft. lbs. Intake Manifold Bolts Intake Manifold/Lower Manifold (As applicable VIN Z & W) 35 ft. lbs. Upper Intake Manifold Turbo (VIN Z) 18 ft. lbs. CMFI (VIN W) 124 inch lbs. Knock Sensor 14 ft. lbs. Main Bearing Cap Bolts (Inthree steps) 80 ft. lbs. Oil Pan Bolts 100 inch lbs. Nuts at Corners 17 ft. lbs. Oil Pump Bolts 65 ft. lbs. Oxygen Sensor 30 ft. lbs. Rocker Arm (With positive stop shoulders only) 20 ft. lbs. Rocker Arm Cover 89-90 inch lbs. Rod Bearing Nuts 1988-90 45 ft. lbs. 1991-93 20 ft. lbs. * Starter 30-33 ft. lbs. Thermostat Outlet-to-Engine Bolts VIN Z 21 ft. lbs. VIN W 14 ft. lbs. Throttle Body-to-Intake Manifold Bolts (Model 220 TBI) 12 ft. lbs. Turbo Charger Mounting Nuts 33 ft. lbs. Water Pump 30 ft. lbs. * Torque nuts to 20 ft. lbs. then tighten an additional 70 degrees |}
