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I have a 1985 Chevy Corvette, tune port injected 350. I put a brand new fuel pump in the gas tank, but when I turn the key my fuel pump is not coming on. What could cause that? I checked the fuse -- the fuse is good.
I don't want to give bad advice, but with other GM cars of this era, there is a fuel pump "relay" that should come on with the key. When you turn the key to the on position (but don't start it), you should hear the fuel pump turn on for like 10 seconds.
If you don't it could be either the fuel pump, or the relay.
A quick way to check that the fuel pump is in fact good, is by applying positive power to the fuel pump test terminal on the ALDL connector.
My daughter shows you how to do this on her channel on this video at the 4:12-5:17 mark.
You only need to test it for a second. If the fuel pump turns on, then you wired it properly and the fuel pump is connected... in this case, it's likely the fuel pump relay. For most GM cars, if you crank it enough, it builds oil pressure and then the fuel pump should come on regardless. But I don't want to say anything wrong as I JUST got a C4 and learning, but general GM stuff is the same. So you can at least test your fuel pump this way.
runs on right side 4 cylinders only left side dead
1986 Corvette was running great Z51 Nash 4+3 all of a sudden right side no fuel injection electric pulse, left side pulses injectors runs left side only right side is dead, any suggestions?
1986 Corvette was running great Z51 Nash 4+3 all of a sudden right side no fuel injection electric pulse, left side pulses injectors runs left side only right side is dead, any suggestions?
In all other GM vehicles that use Multi-Port Fuel Injection (MPFI), which is what TPI is, there are two fuses in the fuse panel for the injectors. There's one for the left side, and one for the right side. They fire in banks (batch mode). This is different than Sequential Multi-port Fuel Injection (SFI)... which in my opinion is much better... but wasn't common on cars until the 90s. That's where each injector fires just before the valve opens. With MPFI, it dumps fuel on one entire side of the engine, which then pools above the valve and sits there until the valve opens. We're of course talking a fraction of a second, but SFI provides significantly better "around-town" performance. Above 3,200 RPMs though... it stops making any difference.
Anyway, I would check your fuses. You likely blew one of the fuel injector fuses.
See this diagram I just looked up. It's apparently identical to my Fiero's V6 (Note, this is for a C4 MPFI/TPI Corvette):
You'll note the two fuses that say INJ1 and INJ2. One of these is likely blown.
It COULD be that you've blown one of these fuses because an injector is starting to go bad, but changing the fuse is the first step, and it should start working again after that.
I am using an 87 schematic which should be the same but wanted to let you know this. See if you have lost voltage or ground to the injector. I just checked my car for you and KOEO on my car has constant 12V on purple/blk (cyl 1,3,5,7). The fuse block via C-237 provides voltage. The ECM provides pulsing ground (creating base pulse width BPW). If your condition is as you say it is you can use the opposite side as an example for testing. Pull all the injector connections off the bad side, if one has completely shorted it will pull all of them down. These injectors do not make a very bright noid light so double check the bad side. You can ohm the injectors out in place.
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Fuel Injection System
