Question about 2003 Chevrolet Suburban 1500

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How to perform intake manifold vacuum test on chevy suburban 2003

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  • Mike Butler
    Mike Butler May 11, 2010

    Are you looking for a leak, or want to know how much vacuum ?

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Use a dyson vacuum

Posted on Sep 08, 2009

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My 2003 ford mustang is sputtering and the check engine light is blinking no code


You can get a free scan from Autozone, Oreilys, or Advance auto parts. This should indicate a problem. If the standard test scanner does not verify a problem, the Dealers have more advanced scanners which can capture intermittent problems.

There are so many possibilities that you need more tests to find the problem. Offhand, if this is a V6 engine, there were problems with intake Manifold runners and sandwich gaskets for 2 piece intake manifolds.

Stuck manifold runners could provide lousy low rpm performance and perfect high rpm performance just like you describe whether a V6 or V8. The 2 piece intakes were used on V6 engines and once you get above midrange in Rpm, it could run acceptably at higher Rpm.

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96 suburban 5.7 liter P0300


code p 0300 is random misfires ===causes ---plug/s--HT lead/s---injector/s---ignition coil/s---low compression ---wiring
replace the cat converters as they are important for proper engine tuning
the problem most likely is faulty injectors that over fuel , leak and need attention
you can fit a vacuum gauge into any vacuum hose to read the vacuum at idle ( 15 or deceleration from high rpms 25)
fluctuation reading at idle indicates problem valves

Apr 02, 2017 | 1996 Chevrolet Suburban

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What can cause a cylinder 1 misfire in a 2003 Chevy impala with a 3.4 liter engine


Misfire reasons.
Bad ignition coil (there are 3 of them), bad spark plug, bad spark plug wire (most common) defective fuel injector, intake manifold vacuum leak, low cylinder pressure due to burnt valves or scored cylinder walls.

Sep 25, 2011 | 2003 Chevrolet Impala

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Where is the map sensor on a 2003 chevy Suburban with a 5.3l engine


{: ) The Manifold Absolute Pressure sensor, also called the MAP sensor can be found at the rear of the Intake Manifold. See no. 6 on the sample diagram:


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Jul 23, 2011 | 2003 Chevrolet Suburban 1500

1 Answer

I have a 2003 suburban that has me stumped! I was on the freeway and it lost power (foot on the accelerator and it wouldn't go!), I limped it to an Auto Zone to scan it and it said maf sensor and map...


Hello, Have a look at your Crankshaft and Camshaft sensors. As I remember there was a problem on some Chevies with the Crank sensor and it caused a different problem with the timing. But it probably could cause more problems so its' suspect.

While you did the filter and Regulator for the fuel, did you do a fuel sample? Also some of the ECU's can be refreshed and it is possible that you lost some info in the main computer and just need a reload of the program.

Although you changed the Intake manifold gasket, did you do a Vacuum check or mist the Vacuum lines while the engine ran? You should see if the Vacuum reading is okay. Then see if there is a Vacuum leak somewhere.

I hope my solution is very helpful to you. It looks like you spent quite a bit to solve this.

Mar 18, 2011 | 2003 Chevrolet Suburban 1500

1 Answer

My 2001 chevy suburban when it is cold and you start it the idle will go to about two grand then will start running rough and die what could cause this issue?


Generally a high idle like that is caused by a vacuum leak. Start checking your vacuum lines and your intake manifold for holes, cracks, or tears. If you can't see any, then get a can of ether, and with the engine running, spray all around where the intake meets the engine block, and all around your vacuum hoses under the hood. If the idle suddenly dips or rises, you have found your leak. Most of the time, it is just a cracked rubber line, or an intake gasket. If there is no leak found, your Idle Air Control valve may be sticking, that is normally located on the side of the intake where the throttle plate is located. Remove the 2 bolts holding it in and see if the valve and chamber are full of carbon. IACs are pretty cheap parts to replace. Let me know what you find and i'll try to hlpe you further. Good Luck

Jan 13, 2011 | 2001 Chevrolet Suburban

1 Answer

Suburban runs lean with K&N air filter


Check for vacuum leaks, especially around the intake manifold gasket. You can do this by running the engine and spraying intake cleaner around the gasket. Any vacuum leak will **** in the intake cleaner and cause the idle to change.

It could also be a dirty Mass Air Flow sensor, faulty oxygen sensor on bank 2, plugged catalytic converter, or plugged or faulty fuel injectors - thus, it would never hurt trying the sea foam.

Also ensure the filter is not over-oiled

Mar 30, 2010 | 2003 Chevrolet Suburban 1500

3 Answers

Need head bolt, intake manifold, and exhaust torque specs


Cylinder Head Bolt Step1- (25 FT.Lbs) Step2(45 Ft.Lbs) Step3(65Ft,Lbs).....Intake Manifold(35Ft Lbs)....Exhaust Manifold Center (20Ft Lbs) All Others (20 Ftlbs).....Thanks

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1 Answer

How to perform a vacuum test


if you want to perform a vacuum test on your aircon system, you will need a vacuum pump and a pressure gauge.

Sep 07, 2009 | 2003 Chevrolet Suburban 1500

1 Answer

2003 acura rsx cough sputter


Sounds like intake air system, look for cracks in hoses (possible intake manifold gasket) all vacuum hoses and connections. Make sure TPS and all filters are clean. Sounds like a lean mixture/flooding issue. Common problems with FWD is the Air Intake Hose, lots of flexing. Cracks form on the bottom and debris comes off inside over time(thus fouling the TPS downstream). Remove inspect carefully, If it is hooped you can fab one up yourself with PVC and some clamps and Aluminium Dryer Ducting. With the proper alignment and bigger airways you will boost your performance. The TPS can be cleaned with Carb Cleaner, replace the air filter and then test with a Vacuum Pressure Gauge install in line, directly off a Intake Manifold Vacuum port.

Try that and get back to me? I'll be around...


Nov 12, 2008 | 2003 Acura 3.2CL

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