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95 Z28, is hard starting especially when low on fuel, if tank is low it takes several cranks. If tank is full, it ussually starts first crank. Is this a bad fuel pump ?
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Since Dodge decided to place all of the fuel components together, it's pretty easy. If you have a low fuel pressure issue, drop the tank and replace the module. The pump, pressure regulator, and filter are all contained in one module inside of the tank.
This can be caused by a defective electric fuel pump inside the fuel tank. The problem that occurs is that the fuel pressure check valve in the pump fails, this lets the fuel drain back into the fuel tank and causes long crank times/hard staring and stalls on initial start..
3 things must happen to engine start
spark you have
fuel you have
compression dont know
if compression to low extremly hard to start
check your air filter is it foulled up--------replaced
when cranking engine is there pressure at the exhaust -- if not disconect to test
if all this is ok
check timming maybe chaine hase jump a few teeth that will make a no start
ussually backfires when it jumps
CHANGE FUEL FILTER CLEAN FUEL INJECTORS.MOST OF THE TIME IF FUEL INJECTORS DIRTY WHEN YOU TURN OFF IGNITION FUEL INJECTORS WILL DRIP FUEL FLOODING ENGINE MAKING HARD TO START.POUR BOTTLE SEAFOAM TO A FULL TANK OF GAS.IF CRANKING TIME TAKES 2 TO 3 TIMES. HAVE CAMSHAFT SENSOR AND CRANKSHAFT SENSOR CHECKED WITH A SCANNER.
Sounds like low fuel pressure or a stopped up fuel filter. If the vehical has two tanks does it act the same on both tanks? there are fuel pumps in both tanks and one one on the frame. if the one on the frame is slow or not working the tank pumps can still run the car sometimes but it has troble getting started
Try to see if you are getting fuel up to the carb by pulling of the hard line and have someone crank the car hold line away from yourself and into a bowl or cup. The fuel filter is inside the carb i belive (if its a quadrajunk) also check that. If it is fuel injected check fuel filter should be back under the car near tank discenct and see if you are getting fuel.
First install a fuel pressure tester on the fuel rail and check the
pressure during crank. It should be about 30 psi.If the pressure is not
good then it could be a bad fuel pump relay or fuel pump itself (in the
tank).
If the fuel pump pressure is good then you could have a bad crank sensor.
I too, once owned a '95 z28, fun car to drive, anyway HO chevy small blocks w/EFI are notorious for being beasts on a cold start. Try this when you get ready to start the car turn the ignition on but don't start let it set there a few seconds you should hear the fuel pumping waking up. Now instead of holding the key and letting it crank and crank, just hit enough to let the engine fire. Not only will lengthen the life of your starter it will lengthen the life of the fuel pump.
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