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I think you have two completely separate issues here (brakes & starting). Since the engine is turning over, the starter is not bad. If there was a vacuum leak causing unmetered air to enter the engine, it would be running differently. It could just be that your MAF or other intake located sensors need cleaning for the starting. As for your brakes, it ...


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The Idle Speed Control (ISC) valve, also called an Idle Air Control (IAC) valve, is used to regulate idle speed. The IAC valve opens a small bypass circuit that allows air to bypass the throttle. Increasing the volume of air that flows through the bypass circuit around the throttle increases idle speed. Reducing the bypass airflow decreases idle speed. The ...


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On some vehicles the Throttle Position Sensor can be adjusted. You can loosen the screws and gently move the TPS until the idle speed changes. I do not recommend doing this.


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I'm under impression that vacuum leak causes poor idle but not kill engine. I suppose your problem is not an intermittent problem? If it is, then it is very hard to diagnose. If it is not, they could have run a fuel pressure test to eliminate fuel line problem before they replace fuel pump. The mechnics have tricked you in this case. Do a fuel pressure test ...


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More likely is your ECU, it's mounted on the front of the engine, it includes the fuel pump relay internally. The cost for a ECU is about $92.00 USD, you can do it yourself. One connector and 2 bolts. Good luck.


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Referring to this website: If all is well and there is no slack in the timing chain then you will see about three to five degrees of "reverse motion" before the distributor begins to turn. To measure this, do the following: Get a socket which fits the front balancer crank shaft bolt. Get a breaker bar which is long enough to turn the crank using it. ...


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The following two items are the exact replacement for various year/make/models of GM vehicles with a 4.3 L engine, including my 1995 Blazer (vin W with PCM)... Spectra Premium model #GM23 "new" distributor Cardone model 84-1635 "new" distributor What is an acceptable amount of up/down play in a distributor shaft? I contact both Spectra Premium and ...


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(EDIT NOTE: I made a bad assumption about the HEI distributor, so deleted all of that nonsense. Please do the following to see if it is an issue, though.) Please check the following: Take the distributor cap off so you can observe the rotor Put a socket on the crank shaft snout bolt (where the main crank pulley is at) Turn the crank clockwise until you ...



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