My 1993 chevy truck ran great when I bought it and got it home n started it about 4 times was great then all the sudden no start popped the hood and smell gas took air cleaner off and while turning mtr over it just dumps fuel in throttle body I have a complete mtr in garage so I changed the throttle body carb and it still has the problem?

SOURCE: '88 chevy truck, no spray from injectors

Not sure on that model what controls the injector pulse, but most vehicles either use the signal from the crankshaft position sensor or a cam position sensor. You should use a LED testlight, (NOT A BULB TESTLIGHT!!) and backprobe the injector terminals (with the other lead of the testlight to ground) while cranking the engine over. If the light flashes on one of the terminals, then you are getting injector pulse, and the fault lies elsewhere. If not, then you will need to replace whatver sensor is used to provide engine position signal on that model. Also, check the wiring to that sensor. Some vehicles have problems with the crankshaft pulley harmonic balancer failing and damaging either the body of the crank position sensor or its wiring.

SOURCE: 1988 nissan pickup engine rotates but does'nt start.

it sounds like the injectors are not opening up man.. replace the injectores and this should fix your problem..good luck keith....

SOURCE: Idle drops really low then returns to normal afew times b4 cutout

my buddies 94 350 has been doing the same thing for years i think its in the computer i would say youll probably have to live with it

SOURCE: i have 1990 chevy pickup 1500 4 wheel 350 eng.

It sounds like the engine is pulling fuel from the tank, and not replacing it with air, causing a vacuum to build in the tank. The vacuum, may build to the point that it resists the fuel pump's efforts to **** fuel from it. If the vacuum is sufficient, it may collapse the tank, or expand the fuel enough for the engine manifold vacuum to **** raw gas into the evaporative emissions control system, hence the cannister.

Replacing the fuel pump, and filter will both break this vacuum, and make it run well for a few more miles, until the vacuum builds again.

The tank is usually vented to relieve pressure and vacuum through the gas cap.

Basically, sounds like a bad gas cap.

Try driving with the cap loose or removed. If that fixes it, buy a new cap. Preferably a locking one, as the amount of fuel these trucks hold is pretty tempting to less than honest folks. My 1990 C2500 has a 34 gallon tank.

Coil?? with the other symptoms, how'd you come up with that?

SOURCE: My 1993 chevy 1500 Silverado truck suddenly quits

I put a new fuel pump, fuel filter, and a fuel pump relay and the fuel pump is still not coming on. I am not getting any fuel. Can you please tell me what it might be.