I have a 95 s 10 with a 4.3 Throttle body injection it idles very rough and hard to start i have to pump the gas to get it to start i have changed fuel filter spark plugs and wires that did not help. Need help
SOURCE: 1999 S10 Blazer 2WD 4.3L V6. Starts hard, idles rough.
you have a single injector under the intake plenum it has 6 branching fuel leads off of this.A very common problem is the regulator attached to this and it leak off fuel which falls into the intake .causing this problem. it needs to be replaced .i have done at least 80 of these in my career.this will fix your problem.thanks for choosing fix ya
SOURCE: 1987 chevy S10 engine idle problem
relace the throtle air idle valve.The temp switch will allso cause this problem.
SOURCE: cuts out under load. 78 chevy pickup. 1/2 ton
Some things you can check. First, with the engine off, look down into the carburetor and quickly move the throttle. You should see a squirt of fuel. If not, the accelerator pump is bad. If that is OK, check the spark itself. It should bridge a half inch gap with no problem and should be healthy (have good "snap" and bluish color). If OK, check the two wires that run from the ignition module inside the distributor, down under the breaker plate.Often those wires can partially break or short to the housing...when the advance moves the plate it will cause a problem.
Only other thing I can think of is timing. That engine likes from 8 to 12 degrees advance (depends on fuel quality) if it's set wrong it can make it fall on it's face when you floor it. (bad chain can do that too).
SOURCE: 98 chevy 1500 5.7L will crank but won't start. I
Change the EGR valve or clean it prior to changing it with fluid filim...........Hope this helps you out.
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