Question about 1990 Geo Prizm
If u are getting spark and fuel pressure then the cause has to be one of the following, the fuel injectors are not delivering fuel due to a wiring or defective ECM (fuel injection computer), the other is the timing belt has jumped teeth and your valve timing is off due to that.
To check for injector function go to a full service auto parts store like NAPA OR CARQUEST, Autozone may also have the following, u will neeed to buy a little tool called a NOID fuel injector harness tester, the tool plugs into the fuel injector connector on the top of engine and blinks if the injectors are getting a signal to pulse and inject fuel, u can also spray starting fluid into the air intake to check for no fuel delivery, if the engine runs you have a fuel problem, verify the fuel pressure, this takes a special tool that costs about $35, it hooks up top the little valve in the fuel supply pipe to the fuel injectors, it looks like a tire valve.
If the fuel system is not the problem then you need to verify the Timing belt hasn't jumped time, to do this bring the engine to the TDC mark on the crank pulley, the distributor rotor must be pointed at the terminal that goes to #1 spark plug, this is the 1st plug back from the timing belt, make sure the engine is at compression stroke, to do this remove the number spark plug and with your finger feel fo pressure as the engine comes up on compression. Good luck.
Posted on Nov 13, 2009
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Posted on Jan 02, 2017
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