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Old 11-28-2020, 11:33 AM   #5
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 44,891
 

2003 L-Series 3.0L Sedan
Default Re: 2008 3.6 V6 Throttle body/MAF cleaning

Well, unless your owner's manual has info on cleaning throttle bodies, I'm assuming electric throttle bodies share similar configurations for servicing at home without requiring training or licensing for cleaning. Previous threads in these forums suggested fragile throttle bodies with members (uninformed) warning against moving throttle plates for cleaning. Service manuals suggest otherwise. I prefer facts from hearsay. Unless someone with hands-on experience has documentation stating against opening electric throttle plates by hand for cleaning with ignition off or removed from engine, there are zero reports of damage occurring from diy cleaning.

I removed my throttle body, intake manifold and runners to replace a worn t-stat. Since it was off the engine, I reviewed service manuals then cleaned it without issues. Manually propped open throttle for cleaning. My L300 has an automatic program to calibrate throttle to ecm when ignition is turned on, engine not started and pedal not pushed - 30 seconds must elapse before the calibration routine proceeds. Whether entering this calibration on purpose or simply leaving ignition on doesn't interfere with everyday use of my car. I don't know if other Saturn models have a similar program. Removing power whether with ignition off or disconnecting wiring doesn't change settings. Presuming all electric throttle bodies don't have complicated linkages like older carburetors for cold/hot presets, the program residing in ECMs allows simplification of design; two feedback position sensors, one servo motor, throttle shaft, throttle plate, two gears, intake air temperature sensor, coolant passages and electrical connections. Zero linkages to bind up needing periodic cleaning, maintenance or adjustments. Simple plug n' play with a calibration procedure when replacing a faulty one. Your electric throttle may not have coolant passages.

If you are concerned, you can always call GM and ask. Whether you're given info is up to that individual.
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