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11-07-2021, 02:53 PM | #1 |
Drives: 2008 Yaris Hatchback Automatic Join Date: Oct 2020
Location: Naples, FL
Posts: 7
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Rough running, idling, and shifting issue. Please help!
Hi all, and thanks in advance to anyone who can help me with my problem(s).
Car:
Description of problems: For several months, the car had been idling rough if the air conditioning was on. It then would become worse when the (radiator)fan kicked on. Then, a couple months ago the check engine light started coming on sometimes. The code was P0505 (IAC System problem). It would usually go off overnight or after I drove around a while. Yesterday it started idling really rough and would stall at idle. It became really hard to restart. The check engine light came on but I didn't have the code read.
It was still hard to start and the engine light was still on. I decided to take it on the freeway to start working the Gumout through the injectors. Now, it seemed like it was much worse. It was sluggish on the on-ramp and when I put the pedal down to put it into passing gear the transmission would shift erratically. I pulled into a lot and disconnected the battery, I thought this may have some positive affect on the ECU. The car would not restart. I looked on my phone and read that a bad Mass Airflow sensor could cause the shifting problem. I walked to AutoZone, and bought a new one. I thought I may have ruined the one I had by cleaning it. I was then able restart the car, but it was still hard to start. It was still running poorly and the shifting problem was still there. I managed to get it home...once it was cruising it ran OK in the freeway. What I will try next:
I believe I am looking at multiple points of failure. Maybe if I had cleaned the MAF sensor and throttle body back when it was just idling a bit rough that would have fixed that...then this thing about the bad shifting in conjunction with the rough idle would have shown itself to be a completely separate problem. So a couple questions for anyone who can give me reasonable feed back:
Again, thank you for any advise you can give! This car is my livelihood. I am a delivery person. So I am unemployed until I figure this out. -JC |
Tags |
engine help, rough idle, sensors, shift, stalling |
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