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Rough idle and wont rev over 2100 RPM after intake gaskets replaced

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Old 06-29-2013, 07:27 PM   #1
freeone56 [OP] freeone56 is offline
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Rough idle and wont rev over 2100 RPM after intake gaskets replaced

I got a lean number 1 cylinder bank code with CEL on my 99 tacoma with the 3.4. I checked the intake manifold gaskets and replaced them. They were falling apart. Replaced the plenum gaskets also. Tried to clean the throttle body and IAC with gasoline because I didn't have throttle body cleaner and no ride to town. Now it starts up OK but idles rough and wont rev over 2100 RPMs. What did I mess up that would cause these symptoms? Any help would be appreciated.
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Old 06-30-2013, 01:16 PM   #2
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did you disconnect the battery before you did the work? try doing this now and let it reset for 1/2 an hour.
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Old 07-01-2013, 10:26 AM   #4
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Originally Posted by JudoJohn View Post
did you disconnect the battery before you did the work? try doing this now and let it reset for 1/2 an hour.
First thank you for replying to my post. I did disconnect the battery and the TPS at two different times and let it set for about an hour. Didnt get any codes after the battery disconnect, but did when I disconnected the TPS. After doing more research I'm under the impression that I may have messed up the TPS by not removing it from the throttle body when I cleaned the throttle body. They are reasonably cheap so I will proly replace it. Does it sound like I'm on the right track.
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Old 07-02-2013, 09:23 PM   #6
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Originally Posted by tacomataco2 View Post
Sounds like a tps problem, maybe a MAF issue. Did you clean the MAF with gasoline?
I didn't clean the MAF this time. I did a month or so ago but I used MAF cleaner. I think you are right about the TPS. I understand it isn't supposed to be cleaned just replaced. Going to replace the TPS next. Hope that fixes it.
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Old 07-05-2013, 04:43 PM   #7
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Wont rev over 2100

I checked the TPS. It is in spec as far as ohms. Lastly I checked the MAF sensor and it seemed a little dirty. I cleaned it and it appears that was what was messing up the rpms. Seems to run fine now, but im waiting on my K&N air filter to dry so I can re-oil it and test drive it. I think with the air intake tube off the air box it collected some dust from the wind even though I had tried to cover it with a clean rag. Man it had me stumped and it turned out to be simple. Thanks guys for all your help. I sure learned a lot with this seemingly simple intake gasket replacement.

Freeone
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Old 07-05-2013, 08:00 PM   #8
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Quote:
Originally Posted by freeone56 View Post
I checked the TPS. It is in spec as far as ohms. Lastly I checked the MAF sensor and it seemed a little dirty. I cleaned it and it appears that was what was messing up the rpms. Seems to run fine now, but im waiting on my K&N air filter to dry so I can re-oil it and test drive it. I think with the air intake tube off the air box it collected some dust from the wind even though I had tried to cover it with a clean rag. Man it had me stumped and it turned out to be simple. Thanks guys for all your help. I sure learned a lot with this seemingly simple intake gasket replacement.

Freeone
Glad it was something simple! Over oiling The k&n can dirty the MAF pretty quick, oil gets on it and so does dust n stuff
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