Had friend put OBD diagnostics to it and error code indicated fuel pump ????? No code indicates replacing any part . Indicates testing ! pressure and flow testing , voltage drop testing the electrical circuit etc... There is a check valve in the fuel pump assembly that is suppose to keep pressure in the fuel lines an fuel rail . When the check valve goes bad allows fuel to drain back into the tank. Try turn the key on an off a few times to build up pressure . The PCM energizes the fuel pump relay for two seconds at key on .
SOURCE: 7.4 liter mpfi engine starts, then shuts down.
The oil pressure sending unit should be located behind the distributor way in the back angled away from the engine, fuel filter been changed?
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SOURCE: intake gasket went bad on 1998 chevrolet lumina
There is None to my knowledge.. Ive done thousands of them.. Its way too hard to explain.. I did my first one by the seat of my pants.. only advice I can give is : Dont mix up the pushrods!! If ya do,, it'll warp valves bc the intake and exaust push rods are different lengths
SOURCE: Chevy S-10 Start problems
If hall effect switch was bad you wouldn't get any spark.What year 2.5L is this?Is this a 2 injector Throttle Body? The pink wire on top of injectors comes thru a 20Amp fuse controlled by the Ignition switch you should have battery voltage with key on The dark green and dark blue wires come from the pcm which are called injector drivers the drivers supply a pulsating ground if you crank the engine with a test light between either pink/dk green or pink/dk blue test light should flash dimmlythat would mean injectors are being driven but there isn't any fuel at the injector or the injectors are bad no pulse means either a bad computer ( which these drivers are known for going bad)or the computer isn't being commanded to fire the injectors.
SOURCE: looking for torque specifications for intake
Upper bolts are 18 ft.lbs.
Lower bolts are 115 in.lbs.
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