2000 ZR2 w 170000km.

Barely started earlier... then Idled fine, but when I pulled out of the driveway it was very jerky and had no power. Idles fine, so I rev the engine, jerky and no power when revving. Turned off, now it won't start at all.

Fuel pump & filter replaced 6 mo ago. Turn key to ACC and I can hear the pump pressurize the system. Swapped the Fuel pump relay. No check engine light. Pulled a plug wire, put a screwdriver bit in the hole and held near ground, GF cranked the engine and I get a 1/8 gold spark. Tried spraying carb cleaner directly in the intake when cranking, but still wouldn't fire. Not sure where to go from here... I don't have a pressure gauge to test for fuel pressure any way I can do a mickey mouse check to see if fuel is getting to the injectors? I do have a shop manual, but not sure where to go from here.



Thanks,
Bryce

 

You really cannot tell the difference between 50psi (too low) and 60psi (right on). You really should rent, borrow, or buy a fuel pressure gauge.

 

Update: I tried pouring a cap of gas right into the throttle body, while having my GF crank the engine. It wouldnt even cough, just crank crank crank... sounds to me like a sparking issue. I pulled the wire from the ignition coil to the distributor cap... I dont really know how to read my ohm meter though...

Wire is about 10" and reads 1.57 on the 20k setting. I pulled one of the other plug wires to compare.. it is longer though... maybe 20".. it read 2.6 on the 20k setting too... Not sure what that all means though.

 

The longer the wire the more resistance it will have. Different wires have different resistance values. Unless both wires are bad the values uou have look reasonable to me.

Try a spoon full of gas instead of carb cleaner as it might not be flamable. Put the gas in and get back before trying to start it. If it tries to start you probably have a fuel supply problem. Check fuel pressure next.

Since the fuel pump and filter are pretty new they are probably ok but no guarantee.