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Old 04-10-2017, 06:38 PM   #1
jfenley22
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Default 03 Saturn ION 3 stumbles after letting off brakes

Hey there,

Have a 2003 Saturn ION 3 with A/t trans. Having this problem where once the vehicle warms up, it will start to hesitate and almost stall right aft letting off of brakes on initial acceleration. Noticeable really if I take my foot off the brake after coming to complete stop and let the transmission move the vehicle. Applying no gas. If I apply gas it sputters then takes off fine again until coming to a complete stop. There are not trouble codes and vacuum gauge reads perfect and responds perfect. Here are the items replaced to try and solve this.

Ignition switch
Intake manifold gasket
Ignition control module
Spark plugs and COP
Fuel filter
Both 02 sensors and catalytic converter (both tested bad)

Fuel trims were lean but return with last stated repair.

Tested
TPS
MAF
IAT


Any advice or avenue to test would be greatly appreciated

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Old 04-10-2017, 07:03 PM   #2
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2003 L-Series 3.0L Sedan
Default Re: 03 Saturn ION 3 stumbles after letting off brakes

Mileage? Cleaned throttle?

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Old 04-11-2017, 08:48 AM   #3
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Default Re: 03 Saturn ION 3 stumbles after letting off brakes

Mileage is 144,000 and the TB has been cleaned.

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Old 04-11-2017, 09:41 AM   #4
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2003 L-Series 3.0L Sedan
Default Re: 03 Saturn ION 3 stumbles after letting off brakes

A fuel pressure and compression check are next. No one can tell you when a fuel pump fails after a new car warranty expires, the same for engine compression. Age related issues begins during and after manufacturers warranties run out. Unfortunately, long term ownership transfers problems to us shouldering any issues for repairs.

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