My first question would be is the injector spraying when you crank it ?
The way its supposed to work, the fuel line to the tank should have about 10psi of pressure before you crank the engine. When you turn the key on the pump gets power for 3 seconds to boost the pressure. The pump stops working until the engine has oil pressure which takes a few seconds.
If the base fuel pressure leaks back to the tank, or the pump relay is not powering the pump, you won't have any fuel pressure or spray until you get oil pressure.
SOURCE: 2002 chevy Blazer hard starting
i agree with the fuel pump problem this is quite common with these trucks. but the fuel injectors on this motor are not accesable without removing the plenun and they are not standard fuel rail injectors so you can not test as earlier instructed.
SOURCE: 82 corvette crossfire injection, engine
Please go to the crossfire injection forum to get some straight answers to the 82 corvette CFI system and how to troubleshoot it properly. There's a lot of misinformation given here, so much so, I don't know where to begin.
One thing is, the 82 corvette CFI does NOT have a MassAir Flow sensor system, it uses MAP and O2 mostly. The CTS sends a signal to the ECM telling it what the temp of the motor is and in turn the ECM controls the amount of fuel being dumped. On the older (orignal) CTS sensors, they have one wire and takes its ground from the threads. If any coorosion takes place, usually the CTS will report a cold engine and request lots of fuel.
To repair this issue, install one of the newer style CTS sensors that have two wires, one for signal and the other is ground.
Fuel pressure and vacuum leaks on any CFI motor play key roles. Set the FP to 14-15psi measured inbetween the TBs. The regulator is located on the rear TB and must be slightly moded to make it adjustable and can be done in a few minutes.
SOURCE: No Fuel at throttle body
If you think it's the pump ... Find your owners manual to find locations of fuses and relays ... First is this vehicle on level ground? Does it have sufficient fuel level (1/8 tank or more) then have an assistant turn on ignition switch to run position (not start) while you listen under the tank to hear a pump ... it may only make a noise for a few seconds ... is there fuel getting to the throttle body at the input line (it could be the injector) if there is fuel pressure at the throttle body/injector it may be the injector itself) >>>If no sound is heard ... first check for power at following locations >>> Fuses >>> Fuel pump relay >>> harnesses/connectors going to the tank from the front all the way back >>> connector at pump (tank likely will have to be emptied and removed, and you would rather avoid this if possible) >>>pump ... I don't suspect filter, as I've never had one suddenly fail completely
SOURCE: 1994 pontiac transport se sluggish running
Ck your exhaust pipe at rear of car noting any obnoxious smell like rottrn eggs. Hold a piece of paper, I use a dollar bill ,in in front of the exhaust. If it blows the paper gently, you have a catalyctic converter going or is bad. Will need replace if so.
SOURCE: 2002 GMC Sonoma 2.2l 4cyl.
With the ignition key turned on without trying to start the engine you should hear the fuel pump run for a few seconds. That is how its primed to start. Upon starting the oil pressure reaches normal operations & the prime switch will cut off by the signal from the computer. Thus the engine still needs fuel to run so the computer switches on the fuel pump relay to provide the fuel to the engine. The prime switch is intergrated with the oil pressure switch. If you do not hear the fuel pump upon having the key on replace the oil pressure sensor
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