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Knowing the injectors aren't firing the electrical circuit needs to be checked, the ground path to the injectors needs to be proven as well as the power supply, batter voltage to the injectors, the PCM controls the grounds for the injectors, circuit A142 feeds off the coil and supply's battery voltage.
If it's bump influenced and doesn't take place turning, you want to have the sway bar links looked at, the sway bar itself, and the rack mounts to the sub-frame...
Several option are available here that could be causing your leak. First an common is the hose that comes off the the back side of the water pump, runs under the intake manifold and feeds the heater core, intake removal is necessary, with this procedure you'll be taking care of the other problem area, the intake gaskets or even the intake.
Your question is the very reason for this site: insert your info and zip in the appropriate info blocks and you'll have your proper low to high cost of repair, that's of course your diagnostics are accurate.
Without scanning or pulling any codes, the most common problem is a breakdown in the ignition signal to the plugs, which under accel or a slight strain the spark leaks out grounding that signal to the corresponding cylinder creating a misfire. Time to put some parts on to correct the problem....
Your question is exactly why this web site exists Plug in your car info with your zip code and you got your answer!.
In most circumstances like this the gasket between the cylinder head and block has been compromised allowing the engine fluids to cross contaminate.
the most common area to look at first and the easiest is drive belt or accessory belt tension or wear out.
In many circumstances like this I would typically suspect the secondary ignition components: such as ignition wires leaking voltage causing a cylinder miss. Under load designates a drop in ignition signals. You may have a defective component ex: a cracked plug.....if the ignition is good I'd check for a lean or restricted injector.