RPM's stay after letting go of the Gas...
Hi guys, I try my best to follow the forum rules, so I spent the last few weeks searching for an answer everywhere, but cannot find out what to do.
So my situation is as follows: I bought my Jetta a few weeks ago, got a good deal on it. It seemed fine, but I had a prepurchase inspection done at a shop here in Springfield, MO and they told me everything was...okay...They said someone had most likely tampered with the CEL...okay...so they pulled a couple of codes that were lingering. Here is the info that they gave me:
"A NUMBER OF STORED DIAGNOSTIC TROUBLE CODES: 17834 EVAP PURGE VALVE P1426,
19497 POWER TRAIN DATA BUSS IMPLAUSIBLE ENG TEMP MESSAGE FROM INSTRUMENT PANEL.
PO3041 INTERMITTENT. 16502 COOLANT TEMP SENSOR, G62 SIGNAL TOO HIGH PO118"
So, my first instinct was to buy a new coolant temp sensor, which I did and am currently waiting for. But I think my problems spring from a different source.
Problem #1: When the car is at normal operating temp, the vehicle idles at around 800, but it bounces between 800-900...When it's on the lower end, near 800, the car vibrates a bit. I can see the engine vibrating as well.
Problem #2: I kinda felt something has been wrong when driving recently and I finally pin pointed it. So when driving down the highway today, I was going about 70mph, RPMs were about 3100 (is this normal?). The strange part was, when I took my foot off the pedal, the RPMs only decreased slightly, maybe 100. My question is, what can be causing this? The car started slowing down, but it's almost like it's not disengaging or something...I have no idea what it is.
I have gone through every Jetta Forum I can find and these are the two issues that I cannot seem to resolve, or even find anywhere. If anyone has links or suggestions, I would so greatly appreciate it. Like I said, I'll be replacing the coolant temp sensor (g62) in the next few days, along with maybe the purge valve if I got the wrong one.
I appreciate any help I can get, thank you so much!!!