What should idle speed be on Chevy Blazer?

My first test would be with a vacume gauge. If the vacume is good it should hold between 25 and 29 at idle. May be a little low cause of the rough idle, but what your looking for Is for it to drop slowly to well below specs. This checks the catalyst converter it could be clogged.

Where is the idle control valve on a Chevy Vortec?

The idle control valve sits on the throttle body and is responsible for adjusting the amount of air that enters the engine at idle, ultimately controlling engine idle speeds. At idle, the valve blocks a small amount of air from entering the engine, keeping idle RPM’s low.

Why is my Chevy 4.3 engine still running?

Checking your vehicle’s fluid levels is always a good idea to maintain the overall longevity of the engine. Once you have ruled out all the basics, you can go back to what the Chevy 4.3 engine is known for: bad idle air control valves and throttle control switches.

Why does my Chevy Blazer engine bog down when I hit the gas?

Take it to a good local mechanic (not a dealer) and see if this is one problem. My Blazer bogs down when you hit the gas and has trouble starting. We have replaced the MAF sensor, plugs, rotor, cap, plug wires, and fuel filter. The fuel pressure is at 50psi when idling and 64 wot when driving.

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

What are the symptoms of a bad Vortec Spider injector?

Symptoms of Bad Vortec Spider Injectors 1 Misfire engine codes (P0400-P0406 and P0300 codes) 2 Long starting, hard cranking 3 Poor idle and running at low-rpm’s, but fine at high rpm’s

Why is my Chevy Vortec 4300 V6 leaking fuel?

In the L35 and LF6 engines, the spider injectors are known to leak at the pressure regulator and at the supply and return lines due to a design fault. Outside of leaking fuel onto the exterior of the engine itself, it can cause excess fuel to get sucked into the engine.

How to check the power of a S10 Blazer?

An expert that got 5 achievements. An expert whose answer got voted for 100 times. Check your coil output, buy a cheep spark tester. Pull of a spark plug wire and plug in the tester (ground the other end), set it to bridge a gap for 30,000 volts.Have someone start it and make sure the spark will jump the gap on the tester.Danger-Very high voltage!

Why does my Chevy Blazer have no power?

If not that code then your problem is most likely the cheap plastic distributor that GM installed for that year. Take off that expensive cap and see if the shaft jiggles. It is better to remove the distributor to inspect it. AutoZone sells a lifetime warranted Distributor for about $90.

Is the engine idles fine but no power on acceleration?

This is for a 1995 chevy s10, 2.2L four cyclinder, automatic and regular body style with approximately 170 K miles. After every long trip I have to top off the engine oil. Now, I smell burnt oil and it loses power when driving and also idles rough. Also, on your conclusion, what would be a estimate ( by average ) for repairs. helpful?

What’s the fuel pressure on a Chevy Blazer?

My Blazer bogs down when you hit the gas and has trouble starting. We have replaced the MAF sensor, plugs, rotor, cap, plug wires, and fuel filter. The fuel pressure is at 50psi when idling and 64 wot when driving. Can we have pressure without flow? Initially the code was p0171. Now that we cleared it it hasn’t come back on.

What causes hesitation and surging on Blazer 4.3L?

Fix Hesitation and surging on Blazer 4.3L If you have Hesitation and surging on Blazer 4.3L and it’s driving like a dog—poor acceleration, hesitation, or a surge and you suspect a fuel problem, you may be partially right.

What is the engine code on a Chevy Blazer?

Initially the code was p0171. Now that we cleared it it hasn’t come back on. Pulled O2 sensor to relieve back pressure and there was no change. Cleaned connections on battery. On scanner TPS checks good ( 0-100%).

Why does my 1993 Chevy TBI stall at idle?

Timing is steady and not jumping all over. It is a fuel issue. The only code that ever sets is a P044, lean exhaust, and the exhaust is really lean. We have swapped PCM/PROM with a same year Suburban, no change. Both vehicles run the same as this did using the other’s PCM.

Why is the idle speed of my car so high?

Step 2 – The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light.)

Where is the idle button on a GM TBI?

The “A” and “B” terminals are located on the top right of the connector. Unplug the IAC valve located on the passenger side, rear of the throttle body. Start the engine. Insert a T-30 size Torx driver into the Idle adjustment screw that is located behind the plug removed earlier.

Why does my Chevy truck shake at idle?

While the truck is idling with 02 lean, a quick shot of carb spray in the throttle body will cause the 02 to go rich. And when the truck sometimes starts shaking at idle it will smooth out with carb spray. I jst don’t understand why the computer is not trying to richen the mixture up based on the 02 saying lean.

What should fuel pressure be on 1993 Chevy TBI?

Verify there is 18-20 of fuel pressure when you dead head the fuel pump. If low, verify there is good power and ground to the fuel pump and that the fuel filter is clear. Also, make sure that the MAP sensor vacuum port in the throttle body is not restricted.

What’s the fuel Gage on a 1993 Chevy truck?

Fuel gage never wavered at 12-13 psi. MAP around 2.9v when PW 2.8MS when truck seemed to be falling a little flat under brake torque. This thing is really close to getting a carburetor on it.

How to troubleshoot a Chevy 4.3 engine?

1 Common Problems. A common complaint with the Chevy 4.3 engine is that it doesn’t idle well, it’s loud and makes awkward noises. 2 Idle Air Control Valve and Throttle Conrtol Switch. Open up the hood and look at all the wires, spark plugs, tubes, vacuum lines and valves. 3 Check Your Oil. 4 Vehicle Fuilds. …

Why is my Blazer 4.3L driving like a dog?

If you have Hesitation and surging on Blazer 4.3L and it’s driving like a dog—poor acceleration, hesitation, or a surge and you suspect a fuel problem, you may be partially right. But before you start replacing really expensive components like the fuel pump, try this: Disconnect the electrical connector to the MAF sensor and take it for a drive.

What causes a Chevy 4.3 engine to stall?

Lack of oil will cause a knocking sound in the engine, stalling, poor acceleration and eventually engine break down. Lack of transmission fluid, battery fluids, radiator and cooling system fluids can all cause symptoms that mimic bad idle air control valves and throttle control switches.