How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Greg Your Own Question

Greg
Greg, Technician
Category: Car
Satisfied Customers: 6917
Experience:  Automotive diagnostic tech
29331485
Type Your Car Question Here...
Greg is online now

My daihatsu Terios will not rev above 3,500 revs. It's not

Resolved Question:

My daihatsu Terios will not rev above 3,500 revs.
It's not missing until it reaches this then it starts to restrict
the revs.
No engine management lights are on when running.
I've replaced the lambda sensors in the exhaust system also.
Submitted: 2 years ago.
Category: Car
Expert:  Greg replied 2 years ago.
Name is***** goal is to provide you with excellent service – if you feel you have gotten anything less, please reply back,

Most typical issue for this problem you are experiancing is the MAF sensor .

Disconnect the MAF sensor then start the engine and see if you can rev the engine higher
than the 3500rpm.

If you can have the sensor cleaned with MAF cleaner ,great care should be taken when cleaning this sensor .a good MAF spray cleaner should work if the sensor is dirty if not replace the sensor .

Before replacing any sensor do a visual check of the engine all vacuum hoses etc connected ,the hose after the MAF sensor is good and no air leaks .

If the revs do not get better with the MAF disconnected then please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.

Your deposit does not pay me until the answer is rated in a positive way,
Not rating or a bad rating does not constitute a refund, if you are not happy or you have sorted out your problem before the answer then please let me know.

Kind regards Greg.
Greg, Technician
Category: Car
Satisfied Customers: 6917
Experience: Automotive diagnostic tech
Greg and other Car Specialists are ready to help you
Customer: replied 2 years ago.

I have disconnected the MAF and it makes no difference to the revs.

I took the vehicle out to see if the revs where restricted and they went to the red line no problem i was doing about 70 mph

When I got home i let the engine tick over then tried to rev the engine up and it was again restricting to 3.500 revs.

I put my foot to the floor and it was missing and spluttering.

Expert:  Greg replied 2 years ago.
Hi Andy .

In Neutral or standing the limiter will kick in and not let you go above 3500rpm.this is normal.,and when you reach 3500rpm it will cut out race cut out .

As long as you are driving and the revs go over 3500rpm then you are okay .

The above is totally normal ,this rev limiter is to stop one over revving the engine which could result in having a blown engine ,seen this happen where the piston rod cracks out the side of the engine block...

Rgds Greg

What Customers are Saying:

 
 
 
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
< Previous | Next >
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
 
 
 

Meet The Experts:

 
 
 
  • Greg

    Greg

    Technician

    Satisfied Customers:

    1067
    Automotive diagnostic tech
< Previous | Next >
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Technician

    Satisfied Customers:

    1067
    Automotive diagnostic tech
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    4197
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    452
    Licensed diagnostic and repair technician
  • http://ww2.justanswer.com/uploads/RO/RobMechanic/068.64x64.JPG Rob's Avatar

    Rob

    ASE Certified Technician

    Satisfied Customers:

    82
    30 years trade experience
  • http://ww2.justanswer.com/uploads/UK/ukiaibal/2012-11-9_205920_SAM0109.64x64.JPG uk_iaibal's Avatar

    uk_iaibal

    UK Car Mechanic

    Satisfied Customers:

    1
    Verified Car Mechanic.
  • http://ww2.justanswer.com/uploads/NA/nabilc/nabilc_avatar.64x64.jpg Billy's Avatar

    Billy

    Trainer/ Master Technician

    Satisfied Customers:

    38
    Trainer 8+ years, master tech. 10+ years, SAE member
  • http://ww2.justanswer.com/uploads/MI/mikeamechanic/2013-4-2_175558_photo.64x64.JPG Mike Kelly's Avatar

    Mike Kelly

    Auto Service Technician

    Satisfied Customers:

    1256
    17 years experience as an auto mechanic, foreign and domestic. 5 years running my own repair business.