Here's a link on how to test the fuel pump and replace if bad.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?fromSearchPage=true&pageId=0996b43f80cb0b83&partName=Electric+Fuel+Pump&partId=0996b43f80cb0b83 Here's the fuel pump and it's price.http://www.autozone.com/autozone/parts/Airtex-Master-Fuel-Pump/1998-Chevrolet-S10-P-U-2WD/_/N-ja87jZ8vcz2?itemIdentifier=298605_151360_0_
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: 1987 chevy s10 2.5l tbi will not start. changed
That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.
SOURCE: 1987 Chevrolet S-10 Pickup1987 chevy s10 2.5l tbi
Check the trottle body postioning sensor...
SOURCE: 1987 chevy S10 engine idle problem
relace the throtle air idle valve.The temp switch will allso cause this problem.
Put a long screwdriver directly on the
injector while the car is running. Hold the handle up to your ear. You
should be able to hear a rhythmic clicking sound. If you do, your injector is
good. Hearing a clunk-clunk type noise means you have found your problem. Hearing silence or unusual clicking
patterns means either the injector, wires or plunger may be bad or sticking.
You will either have to clean or replace them.
---------- To know more about fuel injectors and troubleshooting.Please click on the link below:---
http://www.2carpros.com/articles/how-to-test-a-fuel-injector
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Many a times you get black smoke from exhaust due to faulty injectors.Check fuel injectors. Leaking injectors create an overly rich air/fuel mixture and cause black smoke. Take the valve cover off and look at the exhaust part of the injector, when it is running. Each time the injector fires, you should see oil exhausting from it. If you see oil coming out, then the injector is good. When replacing a bad injector, take the glow plug out and crank the engine to get any oil out of the cylinder.----------------- This should help.Thank you.
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