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2004 saturn ion,2.2 ecotect replaced the air temop sensor, reset timing, replaced coil tower, has rought idling, loose of power shaking runs like ...

Lloyd; sounds like vacuum leak, i use starter fluid (CAREFULLY)to locate vacuum leaks. Also on the 2.2 ecotec fuel dirty stuck injectors can do this, while car is running, give a sharp 2 or 3 raps on injectors one at a time, listen for engine noise change,
check links below.
How To Find Vacuum Leak EricTheCarGuy

ENGINE VACUUM LEAKS Easy tips on finding them

How to find vacuum leaks and easily

How to Diagnose Misfire Codes GM 2 2L

Feb 05, 2016 | 2004 Saturn ION

1 Answer

I need the diagram to find a leak

Bad vacuum supply = leak from engine, or bad vacuum check valve keeping vacuum from building up in reservoir. Use vacuum gauge to find problem, or replace cheap check valve and then listen for any leaks.

Jun 23, 2015 | AC Cars & Trucks

1 Answer

2003 trailblazer, 4.2..... No vacuum to the fuel pressure regulator. Why?

vacuum leak at intake or maybe to brake vacuum booster. Usually able to find with carb cleaner. Once the carb cleaner enters at vacuum leak it will raise the rpm's then you know where to look for the vacuum leak.

Dec 21, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

Vacuum pump location

The problem has nothing to do with a "vacuum pump."

You either have a vacuum leak under the dashboard (vacuum line broken or fallen off), or you have a bad vacuum solenoid (less likely).

Best thing to do is listen for a hissing sound under your dashboard when the vehicle is running with the A/C off. Find were the hissing sound is, and there's your vacuum leak!

(My bet is that you will find the vacuum line has come off of the automatic parking brake release. This is the most common source of internal vacuum leak in those vehicles.)

Jul 18, 2014 | 2001 Ford Expedition

1 Answer


yes it can you need to find the leak. vacuum line also controls the fuel into the engine. also clean the idle vale and change the air filter. you can use some washing up liquid with some water in a spray bottle to find the leak if you cannot hear it. run engine and spray onto the vacuum lines when it starts to make bubbles there is the leak. sometimes if it is a bad leak it will suck up the water and leave a dry patch

Oct 11, 2013 | Cars & Trucks

1 Answer

1997 bonneville 3800 engine vacuum leak

Look for cracked and gummy vacuum hoses on the manifold. You may find one disconnected. Sometimes you can get by with shortening the hose slightly and then connect it back..

Nov 11, 2012 | 1997 Pontiac Bonneville

1 Answer

Engine idles rough

Check for a vacuum leak. If the vehicle is over 15 years old, replace all under-hood vacuum hoses. You can find a vacuum leak by spraying carburetor cleaner on all vacuum connections with the engine running. The engine rpms will increase when you detect a leak.

Jul 12, 2011 | GMC Yukon XL Cars & Trucks

2 Answers

I have hard break peddle with little breaking power. I checked the vacum pump a found 13 inches of vacum. the hose removed from the vacum booster will **** your finger to it with motor running. the truck...

Hello, Check other Vacuum lines for leaks. If you have a 4x4, they can have Vacuum operated hubs and a leak anywhere will draw down the Vacuum. I found most pumps running at about 21psi. Check for a Vacuum Reservoir. The older models used one looking like a coffee can and they would rust on the bottom and leak.

If you take off a vacuum line and use a hand vacuum pump, you should easily find a leak on one of the remote lines. Another test idea is to remove the Vacuum pump lines, put in soapy water, and pressurize with about 3 PSI. Any vacuum leaks will blow bubbles and soapy fluid. Its your choice on what to do. I would reserve the soapy water for a line I find to leak with a hand Vacuum pump.

Many of the people wih your problem replaced the vacuum pump and were good to go. But if you can measure the vacuum and find the leak, you may save money on a part you do not need.

Jun 08, 2011 | 1996 Ford F350 Crew Cab

1 Answer


In the past we have used starting fluid to find vacuum leaks. Start the engine, let it idle. Spray quick shots of starting fluid at your vacuum lines in isolated areas. When the starting fluid find the vacuum leak the engine will react to it... usually by going up in rpm. Depending on your engine computer, it may stall the engine. Either way you will find your vacuum leak. Get starting fluid or "ether" at Autozone or O'Reilly.

Dec 01, 2009 | 1999 Volvo S80

1 Answer

Vacuum Leak, the car jurks sometimes while riding.

When the problem is a vacuum leak you also have troubles at idle.
The vacuum can be tested using an hand tool gauge like this.
Vacuum/Fuel Pump Tester Kit
Once you find the leak, replace the leaking part.
Often it is easy to find the leak at a glance, as it is hissing or you notice the air out from the leak. Other techniques are pumping smoke inside vacuum or spreading soapy water on vacuum lines.
check also the EGR valve.
If you need the vacuum system diagram purchase a repair manual like this one : 2000 Cadillac SeVille STS Repair Manual on CDROM .
Here also a free tutorial on vacuum problems.

Jul 14, 2009 | 2000 Cadillac Seville

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