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Re: will not fire
Remove crank sensor and with the conector still conected to it, pass a metal rench or any thing metalic to the fron of the crank sensor, and you shoul be hable to hear the fuel pump or the spark at coils, if not most likelly the sensor is bad,
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Lost me there at"injectors don't fire, but they do" Anyway, the crank sensor/ECM is what controls injector fire. Could be corrosion at the injector,crank sensor, or ECM plug. Could be the injector/s died. Been a long time since I worked on a TBI. but the injectors can be checked with an ohm meter. I don't remember the numbers though. You can find the numbers on the internet.
Take to car to a diagnostic center, and they will attach a diagnostic machine to the car to see if it's the onboard-computer that's malfunctioning.
If the fuses are all OK, and the starter cranks the engine, but there's no firing, the diagnostic system will tell the tech what it is, there are various reasons there's no firing when the engine cranks,
Someone may say check the disable switch on the transmission, but if that's broken, the starter will not crank the engine.
If your check engine light is on get it scanned. If not pull the camshaft sensor and make sure the magnet is still in place on the cam shaft. You might need to crank it once or twice to turn the camshaft.
hi i had similar problem with mine and also done exactly what you tried but i eventually fixed it by replacing the fuel pressor regulator as the problem was the fuel it was just getting too much and flooding it then after a wait it would fire strait up hope this helps
remove the fuel tank and on top of the fuel tank sender unit is a frequency activated switch ,4 wires go into this and two are bigger wires ,these two bigger wires cut and join together and i think this will cure your problem .
Does the starter motor turn the engine over but you do not get any ignition (the engine fails to fire). Sudden poor acceleration and failure to start point to an electrical problem. Take out the plugs and check the spark quality on each one in turn. Bad spark means bad coil(s). If sparks are good then the timing is maybe wrong and this then points to either the crank sensor or the cam sensor as at fault. At 10 years or 100,000 miles it is worth changing these sensors anyway as they are prone to fail with age and heat.
Next clean the throttle body interior thoroughly. Check all vacuum hoses for leaks.
Check all your electrical connections you were working near, sounds like you may have pulled a wire off a sensor (or disconnected one for the R&R of that water pump) or the ignition coil/pack. Also check for a "crank sensor" near the crank shaft some of those engines had a sensor there if that sensor is not fully connected ecm will not get the info it needs to power up... engine will not fire.