Question about Chevrolet Blazer

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S10 fuel injectors

I have an 87 chevy with a replaced fuel filter and fuel pump and the injectors wont pass the gas

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Do you have good fuel pressure at the fuel rail? Do the injectors click when turning over the engine? Use an automotive stethoscope or a long handled screwdriver touching your ear and the injector(s) to listen for the clicking sound they make while working. If no sound, check all fuses and fuse relays and electrical connections related to your fuel system. Some cars have a fuel pressure disconnect switch in the rear near the fuel sending unit. Might check that to see if it is stuck.

Posted on Apr 20, 2014

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Try a strong solution of Sta-bil that is a brand name sludge and varnish remover, Mix a strong mix up in the tank. Crank engine and see if it will start. If not, crank several times for about 10 seconds. Let sit overnight and try again. It seems as though your injectors are plugged. So try this. It is an awesome product.

Posted on Apr 20, 2014

  • Daryl Gleaton Apr 21, 2014

    How long has the vehicle sat since it last ran? The above solution is spot on for injector system testing. Do you have the equipment ? Pressure gauge test light etc.. I was assuming the vehicle got some old gelled gas from a can or sat for awhile. Did you get it running?

  • marc w Apr 22, 2014

    Ha Ha Daryl!!. I never considered the truck has been sitting forever. My cars are almost as old as that truck, but they are everyday drivers. Never crossed my mind. Guess its time to step into the future! Thanks!



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SOURCE: 1991 Chevy S10 Pickup

First check for battery voltage. Then make sure you have a check engine light when the key is in the run position. Make sure the fuel pump relay is good. Check to see if there is power on one side of the injectors, if these wires have a short to voltage or ground the injectors will not funtion properly. In this system the injectors are supplied with constant power and ground controls pulse width. In these blazers and s-trucks PCM ground sees to become an issue. In mine I directly routed the system grounds to a metal body panel under the right side of the dash. In my Blazer I swapped out the motors and converted from and automatic to a manual transmission. And another problem I found was when I lifted the dash to install my clutch pedal, I broke my brake light switch. In an automatic the brake pedal switch interups the ses light circuit. If the PCM dosent sense the ses light on the system cannot ground. Good Luck with it, At the time I had completed my second of four automotive level so it took me a bit to figure it out on my own. Once I took my level 3 (electricl) it sunk in alot quicker. Happy hunting, don't get too pissed off.

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SOURCE: 1992 chevy s10 will not start

does the exhaust sound restricted? if u are not sure most muffler shop will test for a restricted Cat for free.

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SOURCE: replacing the o rings on a 95 chevy s10 2.2

You have to take the upper Plenum off. There are hard plastic lines there that are common failure items. They get brittle and crack, they also can leak fuel into you oil. Its commonly known as the spider assy. It can only be bought as an assy. It is a fairly envolved job. Difficulty level 4 of 5.

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SOURCE: having problems with chevy s10 replaced fuel pump

Check the cable that goes from your battery to the fuse box the relay that is clicking is on. Check for lose bolts or corrosion of the contacts or something like that. If the relay is clicking it sounds to me like it is a voltage issue going to the relay.

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SOURCE: I have an 87 s10 blazer with 2.8L I Replace tbi

on a vehicle that old the wires are brittle start at the injector and check for cracked or broken wire in the harness

Posted on Nov 23, 2009

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