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95 4 cyl Tacoma bogging down

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Old 07-22-2010, 12:32 PM   #1
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95 4 cyl Tacoma bogging down

sorry if this post is somewhere else, but ive looked and im about to go crazy trying to figure this out. My truck does this the majority of the time. When i start it up and try to accelerate it bogs down really bad. Then when im going down the road it will just fall on its ass all of the sudden. Its not the tps, mas, plugs, plug wires, dis cap, rotary button, bad gas, throttle body, air filter, stopped up intake, or my muffler. Any more suggestions? Ive tried so many things and cant figure it out. Maybe the EGR vavle getting turned on at the wrong time?

Thanks
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Old 07-22-2010, 12:37 PM   #2
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What motor? 2.7l I presume?
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Old 07-22-2010, 12:57 PM   #3
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Check for splits in the intake hose and vacuum lines.
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Old 07-22-2010, 05:44 PM   #4
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yes it is the 2.7 sorry i should have specified and ive check all the hoses for vacuum leaks too. thanks for the replies.

this tacoma is giving me so much more trouble than any toyota ive ever seen
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Old 07-22-2010, 06:28 PM   #5
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I think you should look into a new fuel filter and a compression test.
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Old 08-01-2010, 11:56 PM   #6
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the fuel filter wasn't it and the compression is great. maybe the computer is just losing it?
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Old 08-02-2010, 12:01 AM   #7
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cats getting clogged up, and or use some sea foam?
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Old 08-02-2010, 12:29 AM   #8
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Quote:
Originally Posted by 98tacoma27 View Post
I think you should look into a new fuel filter and a compression test.

I agree. compression check. u may have a dying motor...
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Old 08-02-2010, 07:46 AM   #9
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the cat is interesting because the code is on for it and the cat is bad, but ive took it off and you can see right through it. could it still be it? and i hope its not a dying motor haha at 118,000 ill be outraged
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Old 08-02-2010, 07:47 AM   #10
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Do you mean the cat is empty? No catalyst material?

Which code? 420?

You could have a bad AFR senosr too. That will sometimes casue the code for the CAT to pop.
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Old 08-03-2010, 09:03 AM   #11
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i cant remember the exact code but it says catalyst system failure. and the cat has everything in it and its not stopped up so i dont know.
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Old 08-03-2010, 09:10 AM   #12
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Yes, it could be the CAT even though it isn't clogged. There are several other things to check; exhaust leaks before the CAT. Look at the Exhaust manifold for cracks, look at the joints for leaking exhaust, look around the sensors and the CAT itself. If you don't find any leaks, then the only way left to troubleshoot it is to start throwing parts at it.
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Old 08-03-2010, 02:12 PM   #13
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yeah i have checked for exhaust leaks i think im going to test the fuel pump and see if it is the problem with it being intermitent its hard to find but then ill take the CAT off and see how it goes
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Old 09-08-2010, 06:19 PM   #14
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Any news on it?
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