Question about 2007 Volkswagen Jetta 2.5 Sedan
Hi VW fans a 2007 Jetta 2.5 liter with a MANUAL transmission. Here is the problem: When I take my foot of the gas pedal, the car does not de-accelerate (engine braking) for a full 6 seconds! The Cruise control was broken and I thought that was the problem but even after it was repaired the engine still coasts at the same speed a full 6 seconds after I take my foot off the accelerator. OK, here's the dumb question: Is this normal? My own answer is NO! Maybe for an Auto-tranny. The car is under warranty so I can take it in again to the dealer but they don't seem to understand what I am trying to tell them. Do you all? thanks
The problem that you describe is in no way normal. That six second lag that you describe is more than enough time to get you into a serious accident. I have experienced a similar issue on Mitsubishi automobiles. When the hold down on the throttle cable is holding the cable too tight (not enough slack in the cable) or if someone has adjusted the throttle cable to remove the slack causing it to be too tight it will cause a fast idle lag like you describe. On several fuel injected cars stick and automatic I have experienced the engine rev issue you describe. Every time it was fixed by setting the cable tension back too loose.
Another item, if the cable slack does not fix the problem, fuel injected cars are fitted with an Idle Air Control Valve (IACV). They are located on or by the intake throttle valve. The price range for most is $30 to $100. If they malfunction they will raise the idle speed by letting too much air go around the throttle valve raising the engine speed even though the valve is closed. You can check if the throttle cable is too tight yourself. The IACV may have to be checked at the dealer. Only the dealer can tell you if the problem is covered under warranty.
As always check to make sure that there are no loose vacuum lines under the hood.
Posted on Mar 25, 2011
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Posted on Jan 02, 2017
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