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Thank you my Toyota car refuse to accelerate, Yes the car is…

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Thank you my Toyota...

Thank you my Toyota car refuse to accelerate

Mechanic's Assistant: Okay, I'll connect you to the mechanic to discuss this further with you. Before I do, is there anything else you want him to know?

Yes the car is also vibrating

Submitted: 8 months ago.Category: Toyota
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Answered in 5 minutes by:
11/29/2017
Toyota Mechanic: Mike, Auto Mechanic replied 8 months ago
Mike
Mike, Auto Mechanic
Category: Toyota
Satisfied Customers: 514
Experience: Lead Tech at Solis Auto Repair
Verified

Hello, my name is***** will be helping you out! I have over thirteen years of experience in the automotive industry for numerous different makes & models. I enjoy doing what I do, it is my life.

Does the vehicle idle fine?

Is the check engine light on?

Did the vibration occur when the acceleration issue occurred?

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Customer reply replied 8 months ago
No the vibration occurs when I put on the A/C but the main issue right now is they the car refuse to accelerate
Toyota Mechanic: Mike, Auto Mechanic replied 8 months ago

What about the check engine light is it on? Does it idle fine?

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Customer reply replied 8 months ago
is on
Toyota Mechanic: Mike, Auto Mechanic replied 8 months ago

Does it idle fine?

Do you happen to know what codes come up from the check engine light?

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Customer reply replied 8 months ago
No I don't know the code and I don't know if it idle fine
Toyota Mechanic: Mike, Auto Mechanic replied 8 months ago
Ok let me go over some diagrams and get back to you with some possible causes :)
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Customer reply replied 8 months ago
I'm a novice to a car I don't know much about my this Toyota Avensis 2004 model and if I may also ask does this car normally have electrical issues?
Toyota Mechanic: Mike, Auto Mechanic replied 8 months ago

I was just coming back to ask for the year make and model. It is European, I am sorry I have no information for it, I only have experience in vehicles with No acceleration issues in USA models, which have been a throttle unit issue. If Your European Toyota is engineered similar to USA, then I would say it will be a Throttle Unit issue for that issue Occurs a lot on USA models. Would you like another Expert to take over that MAY be more experienced in European Toyota?

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Customer reply replied 8 months ago
I will like another expert that has experience in European Toyota
Toyota Mechanic: Mike, Auto Mechanic replied 8 months ago

No problem :) I will open.

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Toyota Mechanic: Matt, Mechanical Engineer replied 8 months ago
Matt
Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 23,446
Experience: BEng, Repaired my own cars and others for 20 years, worked in Formula 1 for 10 years
Verified

Hello

another expert here

you don't say what year and model your Toyota is but

I'd say if its shaking about on idle and won't respond to the accelerator then its possibly misfiring and may be a lack of fuel pressure from the electrical pump at the tank.

1st thing to try is to remove the fuel filler cap and then flick the ignition on whilst listening for the brief ‘buzz’ of the pump

If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,
Ideally measure the pressure at the injector rail (should usually be around 3Bar / 45psi +) and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.

You can also get this issue with contaminated fuel , if there’s water or dirt in the tank then either the petrol floats on top of the water or the filter sock on the pump is choked up – so if the other things check out then I’d consider pulling out the fuel pump and cleaning the filter sock

And one other thing to try is to loosen off the fuel filler cap, as there’s a 1 way valve built into the cap to let air into the tank and so prevent a vacuum from being created as the fuel leaves the tank to the engine
If this helps then replace the cap with a new item

if this is OK then I'd next remove the inlet pipe off the engine and with the ignition on and engine off , have your assistant slowly press down on the accelerator whilst you watch the throttle plate / butterfly move

it should move smoothly and slowly with no jerks or sudden steps and go fully open

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Customer reply replied 8 months ago
Have tried all that,have also changed the throttle mouth and I have checked the throttle unit as well all re working very fine yet the problem is still there
Toyota Mechanic: Matt, Mechanical Engineer replied 8 months ago

Ok

can you tell me the year and model please?

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Customer reply replied 8 months ago
Toyota Avensis year 2004
Toyota Mechanic: Matt, Mechanical Engineer replied 8 months ago

Thank you

Ok have you measured fuel pressure with the engine running?

if so what was it?

if it was at least 3 bar then I'd say its worth using a 'noid' light to check that you're getting an injector pulse to all cylinders

and if thats OK then I'd do a compression test across all cylinders to check that they are all within 10-15 psi of each other

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Toyota Mechanic: Matt, Mechanical Engineer replied 8 months ago

Hi
do you still need help?
Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! If you're not pleased, also let me know because rating bad does not result in a refund, there are better options. Rating now will not close this post nor prevent further replies
Thanks Matt

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