1999 Malibu problem: Motor turns over but will not crank
I was doing an intake gasket change...triple checked all wiring..valve train..(push rods)..engine will turn over but will not start. Injectors have been disabled and are not pumping,,,don't know why. If it was receiving gas the engine should start at this time. What has the injectors not working?
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Re: 1999 Malibu problem: Motor turns over but will not...
A common thing to leave disconnected is one of the plugs on the ignition module. There are 3. This would also cause no spark. It is possible you have pinched the injector wires under the upper plenum-unless you have checked that already. Would need to look at a few schematics to tey to find a problem.
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what type of engine are you working on. On GM small blocks you will need to turn the crank to zero on the timing tab, which will bring #1 piston to the top ( you can remove #1 plug and verify #1 piston is at the top) Then you will need to turn the rocker arm nut on the intake valves until the push rod is just finger tight, (turn the push rod as you are tightening the nut) and then turn it 3/4 of a turn. once you have done the intake valves you need to rotate the crank 180 degrees to bring up the exhaust valves and do the same procedure to them. If it is the valve lash it should start. Hope this helps, this will probably work on most cars.
1st thing to do is dump a can of motor flush in the crank case. follow directions on can. replace with full synthethic motor oil. Valvoline reccomended. 5w30. change fuel filter, sparkplugs and wires, valve cover gasket (probaly dry rotted.) replace pvc valve. should be good to go after that. cost estimate $ 60 hope this helps.
If you have a 3800 motor check your intake manifold gasket these are the symptoms that my car exhibited untill the motor locked up because it had filled the cylinders with water.
The dex cool deteriorates the gasket and the plastic intake manifold.
Replace the intake manifold and gasket, flush the dex cool out of the motor and replace with the regular green coolant.
The first step is to remove all the parts that are in the way of you being able to remove the valve covers. (Ex.: air intake, loose wires etc.) Then you will need to remove your valve covers (using basic tools) and be very careful to not let anything get on your lifters, which your valve covers protect. Once you have the valve covers off compare the new gaskets to make sure they are the right size. Then remove the old gasket and replace with the new one using a high temp gasket sealant (available at any auto parts store) to attach the gasket to the valve covers. Then tighten down snug and check for leaks after replaced.