Hey all...I'm still sort of working on this friend's '97 4runner with an auto trans and 252k miles on it. Just finished last night with a timing belt, water pump, all rubber cooling/heating hoses, valve cover gaskets, plug wires, plugs, and maybe the kiss of death, I cleaned the throttle body...
Read this:
https://forum.ih8mud.com/95-gen-toyota-trucks/144009-idle-problems.html
And this:
https://forum.ih8mud.com/95-gen-toyota-trucks/339887-tacoma-high-idle.html
And this too:
4Runners.org - Cleaning Your Throttle Body and MAF
Trying to see if there might be some answers out there. Let's move on to what I did.
Cleaned the TB like I've always cleaned em, brake cleaner and a brush. The intake was off so I blew it out with air afterward and cleaned the carbon out of the two halves of the upper intake and also dried them out too. The truck has had the battery disconnected for a week or so as well.
As soon as I started it it was idling at around 1700 or so on the tach in neutral/park. I filled the coolant, bleed it and drove the truck for about five miles. The idle never came back down. I also let it run for another twenty minutes or so, idle never went to normal. I messed around with it a little and saw what I thought was the IAC so I disconnected it and the idle came right down. This seems to tell me that the truck's computer is putting it into high idle mode; as if the AC is on or if the engine were cold. Having it disconnected also put the CEL on right away too. I plugged the IAC back in and cleared the code and the truck still idles high.
Does anyone know if this is the "film" that I removed from the TB? And if so, how come everyone cleaning the TB as described at 4runners.org is not having the same problem, and or, how the hell do you clean your TB? This TB was CAKED in gunk, worst I've seen.
And this just occurred to me, if there was some "film" that could be damaged by carb clean, I would expect that Toyota being as thorough as they are would have a big warning sign to NOT clean it with any sort of solvent if there were a protective "film" on it. And there is no such warning...
Thanks in advance...and if anyone has a ink to the FSM to check values of the IAC/diagnosis of it, that would be a helpful too.
Read this:
https://forum.ih8mud.com/95-gen-toyota-trucks/144009-idle-problems.html
And this:
https://forum.ih8mud.com/95-gen-toyota-trucks/339887-tacoma-high-idle.html
And this too:
4Runners.org - Cleaning Your Throttle Body and MAF
Trying to see if there might be some answers out there. Let's move on to what I did.
Cleaned the TB like I've always cleaned em, brake cleaner and a brush. The intake was off so I blew it out with air afterward and cleaned the carbon out of the two halves of the upper intake and also dried them out too. The truck has had the battery disconnected for a week or so as well.
As soon as I started it it was idling at around 1700 or so on the tach in neutral/park. I filled the coolant, bleed it and drove the truck for about five miles. The idle never came back down. I also let it run for another twenty minutes or so, idle never went to normal. I messed around with it a little and saw what I thought was the IAC so I disconnected it and the idle came right down. This seems to tell me that the truck's computer is putting it into high idle mode; as if the AC is on or if the engine were cold. Having it disconnected also put the CEL on right away too. I plugged the IAC back in and cleared the code and the truck still idles high.
Does anyone know if this is the "film" that I removed from the TB? And if so, how come everyone cleaning the TB as described at 4runners.org is not having the same problem, and or, how the hell do you clean your TB? This TB was CAKED in gunk, worst I've seen.
And this just occurred to me, if there was some "film" that could be damaged by carb clean, I would expect that Toyota being as thorough as they are would have a big warning sign to NOT clean it with any sort of solvent if there were a protective "film" on it. And there is no such warning...
Thanks in advance...and if anyone has a ink to the FSM to check values of the IAC/diagnosis of it, that would be a helpful too.
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