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Post by dguzcorolla on Jul 1, 2017 22:59:39 GMT -5
Hi everyone I've been having a strong vibration coming from the engine of my coroll(its not on the tires its not from the engine mounts i recently changed them with no success) it does it when i hit the gas in neutral and its the same when im going on any gear and when im coasting down the road, the same happens when i let the foot off the pedal when the revs are goin down you can feel it vibrating through the cabin Its not a missfire the engine wont stumble or jump or hesitate its only a really strong vibration. Just in case you wonder i have recent spark plugs double electrodes from denso new ngk wires, new air filter, new coolant sensor there are no vacuum leaks, the engine its stock. No CAI. Recently stocked the fuel injectors Put new filters an gaskets on every one. The chain guides and tensioner are new. I have an obd ll scanner bluetooth And there are no trouble codes the only clues are the catalyc converter its no completing the emissions test made by the computer but there are no restrictions and no leaks on the system Others clues are both o2 sensors are behaving a little bit weird but they respond fine the most trouble part its on the fuel trims the short term its rich the mayor part of the time and fluctuates a lot and the long term its very negative all the time I got no clues on this i need your help please any advise would be appreciated
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Post by dguzcorolla on Jul 1, 2017 23:07:12 GMT -5
Update- the only thing thats crossing my mind its that the throttle body plate its not properly adjusted i had to disassemble the TB for making a deep stocking because the other owner never did and maybe for keeping the engine running he touched the stop screw for the the butterfly and I guess its not working properly since i stocked (i never take off the tps and and i couldn't loosen the IAC valve so I did my best to stock the IAC without taking it apart if somebody knows how to adjust the screw with the tps properly i will be really thankfull
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Post by Rinconrolla on Jul 3, 2017 6:31:37 GMT -5
WoW this sounds like it is gonna be a pain in the ass to find out - Is there a way you can put a video of this on here ?
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Post by dguzcorolla on Jul 3, 2017 19:20:53 GMT -5
It is a pain already i've been dealing with these for months by now and its driving me crazy About the video, yes i will try to posted and in the mean time can somebody with a 1zzfe non vvti like mine and with an obd2 scan tool post the actual readings of their map sensor 1 when the key its on engine off 2 when idling Mines are 87 kpa key on engine off 27 kpa at idle Or in psi 12.62 ignition on 3.91. At idle
I have the doubt that the readings are really low
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Post by Rinconrolla on Jul 4, 2017 5:19:09 GMT -5
Is the vehicle that you are working on is the one in your avatar or is it a different year ? If it is the one in your avatar why did you go double electrodes spark plug ?
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Post by dguzcorolla on Jul 4, 2017 6:08:36 GMT -5
No the one on the avatar was my old ae100 the one that im working with its a 99 1zz-fe and the engines head has a sticker it says use only double electrode for this aplication
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Post by Rinconrolla on Jul 4, 2017 14:55:41 GMT -5
Ok Just checking cause I had the same motor . Did you gap them ? No the one on the avatar was my old ae100 the one that im working with its a 99 1zz-fe and the engines head has a sticker it says use only double electrode for this aplication
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Post by dguzcorolla on Jul 4, 2017 15:34:45 GMT -5
No i didnt cause it suposse its not necessary. I bought the denso spark plugs on the box I remember i read that there was no need to gap them and worked fine for about 4 months and after that this issue appeared. Do you think that maybe the spark plugs are making this strong vibration? What do you think about the map sensor could the pcm be retarding the spark time beacause of a low Map reading?
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Post by Rinconrolla on Jul 5, 2017 10:33:08 GMT -5
No codes on a car means all the systems that run off computer are good , Me personally I gapped mine cause sometimes they can be to close or to far from the manufacture - The gap is .43 each side - I know people say plugs come pre gap but remember nothing is perfect I have seen them off . Other then stocking and gap your plugs to see if the idle goes away in hoping you didnt ruin a plug or a plug is cracked the only way to find out is buy new ones or gap the ones in your car and see if there is any signs of rich or lean on them No i didnt cause it suposse its not necessary. I bought the denso spark plugs on the box I remember i read that there was no need to gap them and worked fine for about 4 months and after that this issue appeared. Do you think that maybe the spark plugs are making this strong vibration? What do you think about the map sensor could the pcm be retarding the spark time beacause of a low Map reading?
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Post by dguzcorolla on Jul 5, 2017 11:36:06 GMT -5
Thanks for the advice rincon I will have to get tye files to gap the plugs or buy new ones to continue with the diagnosis
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Post by Rinconrolla on Jul 7, 2017 10:02:48 GMT -5
cause you have me confuse with the vibration unless you post a video and explaining in the video the vibration - we could take a million guesses - one persons vibration can be different to another persons vibration - So when you get a chance post up the motor vibration
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