I have a 2005 Tacoma V6 automatic with 144k miles. It has just started stalling when I pull to a stop in gear. It runs fine on the highway and around town.
No CEL/MIL so I don't have a code to point me in the right direction. I had about half a tank of fuel, so I filled it with Premium. No difference yet. I'm going out to the garage to check for the obvious stuff right now (clogged air filter, vacuum leaks, plugs... etc).
Looking for other suggestions.
Thanks.
Do you get a CEL key-on, not running? Before starting, or at the point it stalls the CEL should be on with the key in the on position.
Try pulling codes anyway?
Does that vehicle have an IACV? sounds like what a buggered one will do, could just need cleaning as well.
TPS or perhaps dirty iac valve?
Read a couple weeks ago that there will be a recall for that issue. Don't know if 2005 falls in the recall but my 2016 Taco does. There is another one due to be released anytime now on rear diff leakage. Apparently don't work very well with no oil in the diff. Imagine that. So waiting on 2 recalls for my 2016 Toyota Tacoma. I went with Toyota because they're supposed to be reliable and last a long time.
clean the throttle body+ blade.
If it has one, spray some throttle plate cleaner in the Idle air control valve and passage. Some Toyota's you could unscrew two screws and remove the motor portion of the valve exposing the spindle for the valve. turn it back and fourth by hand until it moves smoothly through its range. After that, disconnect battery to reset ECM.
Minor update:
The CEL does work, but I have not gotten a code at this point.
It's drive-by-wire, so there is no IACV.
I pulled the spark plugs and they all look they way that they should. They are only a year old and are properly gapped.
I couldn't find any cracked vacuum lines.
I removed the metal PCV valve and cleaned it.
I checked every electrical connection that I could get my hands on.
The air filter is only a few months old and there is no animal junk in the housing.
I didn't have any throttle body cleaner, only carb cleaner, and didn't want to risk damaging the plastic. I'll have to grab a can and a new gasket, just in case. I looked into the throttle body and it didn't look awful. Because it's drive-by-wire, I didn't want to move the butterfly. I know that can be an issue on drive-by-wire Subarus, though I have been known to do it in the past without a problem.
I don't know why, but I had a can of Seafoam on my shelf, so I dumped it into the tank, after filling it up with premium.
I only got to drive it about five miles after putting it all back together, but I didn't have any problems. At this point, I suspect that it was either a tank of bad gas or condensation in the tank after sitting unused for a few days. I almost wish that it had thrown a code so I would have a better idea of where to look.
I've cleaned many, many Toyota/Lexus throttle by wire using a clean rag with throttle plate cleaner and manually opening the throttle (key off of course). I did all of them still installed, so just a quick intake boot removal, clean, and reassemble. Never had any issues. Once the throttle body is all clean it will idle unusually high (since removing buildup just increased airflow) unless you disconnect the battery to clear the learned values. If you leave it idling high, eventually the computer will adjust, but it takes a bit. Surprisingly it doesn't take much buildup to significantly alter idle control.
I second the throttle plate cleaning. I too have fixed multiple low idle and stalling issues with a simple cleaning. Since it is drive-by-wire they don't use IACV anymore. It is completely dependent on the small air gap around the the throttle plate. Normal carbon build up will shrink that gap to nothing eventually.
Brake clean, carb clean, or even seafoam on a rag and a hand wiping of the throttle body is all it takes.
vacuum leak?
sesto elemento wrote: vacuum leak?
Every vacuum line that I could find looked okay.
How's your battery, alternator, and battery cables? My old truck (Chevy) had stalling issues when a battery cable was shot.
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