Oscillating idle after flood, CEL P2109
#1
Registered
Thread Starter
Join Date: Jul 2008
Location: San Francisco, CA
Posts: 56
Likes: 0
Received 0 Likes
on
0 Posts
Oscillating idle after flood, CEL P2109
Hi all
I have an '08 Sport, ~75k miles. Car ran fine until I left for a 3 week trip. GF started it once about 2 weeks into my trip, said she ran the car for about a minute. It sat for another week until I got back. Weather was about 45-55F, damp (I live near San Francisco), and the car was outside the whole time.
Sure enough, when I came back this morning and tried to start it, the starter cranked but the engine didn't catch. I tried deflooding (as in DIY-deflooding-average-joe-plumber), but I didn't do it for a minute, I did it for like 30 seconds. That didn't work, so I left to go to work. When I came back, I spent about 10 minutes deflooding and the car finally started. When I deflooded I just floored the gas, didn't remove any fuses or anything.
Problem is, the idle is _really_ bad - idle RPM cycles between 1500 and 2250, in intervals of about 2 seconds. This is after I let the car warm up. Also, there's a CEL on now, pulled the code, "P2109" - TP sensor minimum stop range/performance problem
I drove the car around the block, that didn't help either so I parked it and here I am.
Is this just an artifact of flooding - should I drive it to work (35 miles one way) and see if that fixes things or try something else? Is the car even safe to drive at this point? - I don't want to make the situation worse.
Thanks for any help
I have an '08 Sport, ~75k miles. Car ran fine until I left for a 3 week trip. GF started it once about 2 weeks into my trip, said she ran the car for about a minute. It sat for another week until I got back. Weather was about 45-55F, damp (I live near San Francisco), and the car was outside the whole time.
Sure enough, when I came back this morning and tried to start it, the starter cranked but the engine didn't catch. I tried deflooding (as in DIY-deflooding-average-joe-plumber), but I didn't do it for a minute, I did it for like 30 seconds. That didn't work, so I left to go to work. When I came back, I spent about 10 minutes deflooding and the car finally started. When I deflooded I just floored the gas, didn't remove any fuses or anything.
Problem is, the idle is _really_ bad - idle RPM cycles between 1500 and 2250, in intervals of about 2 seconds. This is after I let the car warm up. Also, there's a CEL on now, pulled the code, "P2109" - TP sensor minimum stop range/performance problem
I drove the car around the block, that didn't help either so I parked it and here I am.
Is this just an artifact of flooding - should I drive it to work (35 miles one way) and see if that fixes things or try something else? Is the car even safe to drive at this point? - I don't want to make the situation worse.
Thanks for any help
#2
No respecter of malarkey
iTrader: (25)
try unplugging and then installing the throttle body plug to make sure it's seated properly, reset the PCM, and then see what happens
otherwise it's not likely a flooding issue but either a bad throttle body or or an issue with the drive by wire system such as the electronic throttle pedal, etc. It will take a Mazda dealership type system to run the various tests
otherwise it's not likely a flooding issue but either a bad throttle body or or an issue with the drive by wire system such as the electronic throttle pedal, etc. It will take a Mazda dealership type system to run the various tests
#5
Registered
Thread Starter
Join Date: Jul 2008
Location: San Francisco, CA
Posts: 56
Likes: 0
Received 0 Likes
on
0 Posts
In any case, resetting the PCM fixed the issue. I started the car and it idles fine. The CEL stayed on for a bit, but went off after about an hour of driving.
Thanks for the help.
#7
Registered
Thread Starter
Join Date: Jul 2008
Location: San Francisco, CA
Posts: 56
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post
Shankapotamus3
Series I Trouble Shooting
28
03-14-2021 03:53 PM
Danield97
Series I Trouble Shooting
1
09-30-2015 05:59 PM
Evan Gray
Series I Trouble Shooting
0
09-26-2015 12:30 PM