Installing the throttle body for a 2007 Saturn ion engine is stalling when stopping

Go to www.obd-codes.com and look up this code.

Your vehicle has drive by wire or electronic throttle control ! It has a 12 volt electric motor that opens an closes the throttle plate ! You need to have it check for DTC'S diagnostic trouble codes ! an checked for binding throttle plate !

I believe this is almost the same engine and transmission as my 2002 Saturn LW200. We had problems with lurching, jerky shifting and occasional stalling. I was worried that the transmission was going out. Got a transmission service for $150 which they need after 125k miles anyway. Turned out to be the throttle position sensor (TPS). I was able to fix it by cleaning the TPS with WD-40 but your engine has drive-by-wire if I'm not mistaken which makes it more complicated. What this means is that your gas pedal is not directly connected to the throttle body with a cable. it works something similar to a volume knob and tells the computer how much to open the throttle body butterfly. A drive-by-wire throttle system is best left to someone with skills in that area. A shop should be able to read the codes and determine if your drive-by-wire system is working well. That will be much less expensive that a transmission rebuild.

No! Do not disassemble the throttle body. Just clean the bore and throttle plate by holding it open.

Adjust your idle on the throttle body! Should be a set of two nuts on throttle cables

Actually, you will have to have the throttle body bore cleaned physically. There will be carbon build up preventing the TB plate from closing completely. Lucas gas additive used twice a year will prevent this from reoccurring. Mercury Marine gas additive is GREAT as well!

TAKE YOUR TRUCK TO AUTOZONE ASK THEM TO PUT THE MACHINE ON IT. THEY WILL TELL YOU WHAT CODES COME UP.GO FROM THERE.

IF THE ENGINE CUTS WHEN YOU BRAKE ALSO LOOK FOR AN AIR LEAK IN THE HOSE FROM THE INLET MANIFOLD TO THE SERVO (cheaper than a throttle body)

The air filter, fuel filter and oxygen sensor are definitely things to look at but the 2005 ION doesn't have a distributor it has an ignition module. Not the cheapest part. I own a 2005 ION and had a similar problem. It was idling at a low RPM and would stall when I had the clutch in long enough to let the engine idle. I simply cleaned the throttle body and the problem was solved. The throttle body gets a nasty build up on it and needs to be cleaned regularly. It's fine when the throttle is open but as soon as you allow the throttle to close to the idle position the engine is choked because of the build-up. My wife's car is an '06 Ion automatic and it was doing the same thing when she had the brake on at a light or a stop sign. Same solution worked just fine.

Also her car had a problem with stalling when she went over bumps and around corners. These cars have really bad ignition switches and key tumblers and it turns out after we had a dealer look at it that the weight of her key ring (it had way too many things on it) slowly caused the ignition to wear out and it would shut off the power when it jiggled the wrong way.

Not sure if these describe your solution but I hope that it helps.