Mitsubishi

Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Mitsubishi

Mitsubishi Diamante LS: I have a 2003 Diamante. It does not

Customer Question
I have a 2003 Diamante...
I have a 2003 Diamante. It does not seems to be idling up when you turn the ac on or when you put it in gear. I just replaced the tps and still have the same problem. Any suggestions?
Submitted: 2 years ago.Category: Mitsubishi
Show More
Show Less
Ask Your Own Mitsubishi Question
Answered in 7 minutes by:
6/5/2015
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Doug
Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 8,635
Experience: Mitsubishi employed and Factory trained ASE certified technician
Verified
Hi,
Is it the TPS you replaced or the IAC (idle air control) valve? The IAC is what is responsible for idle-up operation.
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
It was the TPS. Is there a way to test or clean the IAC valve before replacing it?
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Thanks... we definitely need to look into that IAC then.
When you turn the AC on, there is definitely no idle-up before the compressor kicks on right?
What about if you pull the steering wheel hard to one direction and hold it... does the idle go up or go down when the steering load is added?
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
Correct. No idle up when ac is turned on. Also, when I pull the steering hard to one direction and hold it there is no change in the idle. Also I meant to mention that when we are at a stop light it will shut off unless we hold the brake with one foot and give it a little gas.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Thanks.
The stop light issue can sometimes be just a dirty throttle, however with no idle up occurring we know that issue takes precedence over it as it could affect both conditions.
Lets go to the IAC and check it out. You'll need to take the intake duct off then the IAC is held on with three screws directly below the throttle opening.
Take it off and clean it, then use your fingers to gently but steadily force the pintle closed. Reinstall the IAC and see if your engine revs high and does not drop normally.
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
Ok. I took it out but I am unable to push the pintle closed.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Thanks.
If you are unable to push it in that is a pretty good indication that it is frozen. While not "easy" to push in, with steady force and at most a little wiggling it should go in. If it can't go in for you, it likely can not go in for the computer either... your hands provide a lot more force than the tiny electric motor inside it.
Before doing anything else lets get a new IAC in there. Take the opportunity while it is out to clean the passageways and the throttle opening, then get the new one in there. Short of anything REALLY unusual like a computer or wiring failure, this should take care of you. Not being able to move it by hand just further seals the odds.
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
New TPS and new IAC. Still having the same issue. What do I try next?
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Just to be clear, the throttle is clean, the IAC is new, and the key problem is that you are not seeing any idle up under load or when stopping etc? If that is correct, the problem did not change in any respect at all, right?
Was there anything abnormal about the connector to the IAC? Was the IAC new or used? If new, was it from a respected brand?
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
That is correct. Nothing has changed. Connectors looked fine. The IAC was new. The brand was BWD.
Customer reply replied 2 years ago
Cleaning the throttle was the very first thing I did.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Hmm.
Lets pull the IAC out but leave it plugged in. Have a helper turn the key on (but not start the engine). Can you feel the IAC hum and move slightly? If not, turn the key off and move the pintle out all the way by hand then turn the key on again, does the pintle retract?
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
Just followed those instructions. It did move out slightly when turned on and retracted when turned off.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Thanks, ***** ***** is working then.
Are you sure there isn't anything else worth mentioning about the situation, like someone modifying the throttle stops trying to "fix" the situation previously etc?
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
We put a simple code reader on the vehicle and saw codes 101, 401 and 403. We. We also used MAF cleaner and cleaned the MAF even though it did not appear dirty.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
None of those codes would have anything to do with idle up not working. Seeing as the iac is working outside of the throttle, let's put it back together and recheck operation... It should be idling up now.
Ask Your Own Mitsubishi Question
Customer reply replied 2 years ago
Everything is back together and there has been no change in operation.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
There really isn't any reason that should be unless something is being left out. The idle up is performed by the iac which is now working and no longer seized. The idle up is commanded when the ac or the power steering is used and neither is causing it to work... Making it unlikely to be signal related since there are two separate unrelated signals and neither would be working.
You know the wiring is okay as again it is verified working.
You could expect a computer failure to cause this, particularly knowing the old iac was seized, however again the iac is verified working meaning the computer is doing its job.
Again with the idle up specifically there really isn't anything else to consider. While you can have other problems cause similar drivability issues, the actual idle up process is extremely narrow in operation, and everything is checking out.
What I would have to do at this point would be to get the throttle body calibrated as all I can imagine is someone tinkered with it trying to fix a problem in the past perhaps. Any shop with a professional grade scan tool can do this by activating the SAS or base idle function, then dialing in the idle while the function is active.
If there is still issue while everything is calibrated I really wouldn't have anything else to suspect but a very strange and very unusual computer problem.
Ask Your Own Mitsubishi Question
Ask Doug Your Own Question
Doug
Doug
Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 8,635
8,635 Satisfied Customers
Experience: Mitsubishi employed and Factory trained ASE certified technician

Doug is online now

A new question is answered every 9 seconds

How JustAnswer works:

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

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

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 PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

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.

CharlesWalnut Creek, CA

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!

SueCharleston, WV

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.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Doug

Doug

ASE Certified Technician

8,635 satisfied customers

Mitsubishi employed and Factory trained ASE certified technician

George H.

George H.

ASE Certified Technician

312 satisfied customers

ASE Master tech 15+ years

Tim Mohr

Tim Mohr

ase master

205 satisfied customers

30 yrs foriegn and domestic, gas and diesel

Jake

Jake

Automotive Technician

195 satisfied customers

Experienced collision repair technician, Pulaski Tech graduate and DSM hobbyist.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

160 satisfied customers

16 years of experience

Mike Kelly

Mike Kelly

Mitsubishi Mechanic

104 satisfied customers

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

AMD

AMD

Master Technician

48 satisfied customers

L1 Advanced Level Diagnostics Specialist

< Previous | Next >

Related Mitsubishi Questions
The alarm is going off. I never knew it had an alarm. Cant
The alarm is going off. I never knew it had an alarm. Cant turn it off . Car wont crank … read more
Jake
Jake
Automotive Technician
Vocational, Technical or Trade Scho
195 satisfied customers
It won't start and I can't put it in neutral to tow it home,
It won't start and I can't put it in neutral to tow it home … read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 satisfied customers
Where is the crank what position sensor located on my 2006
Where is the crank what position sensor located on my 2006 Mitsubishi eclipse 6cylinder … read more
Mechanic01
Mechanic01
1,716 satisfied customers
1991 Montero. Engine cuts out intermittently. While driving,
Engine cuts out intermittently. While driving, usually after being at a stop light and then taking off, engine dies as if I turned the key off. No hesitating or stumbling, just goes dead and then seems to restart while still rolling (manual transmission - may be the car jump starting itself). If I pull over, car will still be running and then will either restart right away or it may take several tries for the car to start again. Battery, alternator, plugs, plug wires, cap, rotor, coil are all new. Problem was occurring before and after I changed these parts out. … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
106 satisfied customers
Same wandering, have replaced steering box, replaced
Same wandering, have replaced steering box , replaced everything on front end, have done alignment, the works. The steering is dangerous, can I delete and put different setup on vehicle … read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 satisfied customers
A 2011 endever. The hand brake light is on. ,t know if a
A 2011 endever. The hand brake light is on. Don,t know if a cable has tightened up or maybe a sensor. It sometimes comes on then goes out and other times it stays on. … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Tcl light tcl light antilock light and cruise light on dash.
Tcl light tcl light antilock light and cruise light on dash. No acceleration when in gear … read more
Jake
Jake
Automotive Technician
Vocational, Technical or Trade Scho
195 satisfied customers
I have a hole in my upper oil pan after going thru a creek
I have a hole in my upper oil pan after going thru a creek with rocks. Don't know if something inside shot out and made the hole or what but my 2004 Mitsubishi Endeavor is not running. It's turns over… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
160 satisfied customers
I have a Mitsubishi Lancer 2011 And problem is that ac
Hi guys I have a Mitsubishi Lancer 2011 And problem is that ac doesn't work By pressing the ac on button There is no codes at ac control module and no codes at ECM Fuses all fine ECM was replaced and … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
160 satisfied customers
I have a Mitsubishi Pajero year 2008, Model:VP6WLNDFL,
Hi, I have a Mitsubishi Pajero year 2008, Model:VP6WLNDFL, Diesel, manual drive, Done only 70,000 km, VIN:JMYLNV96W8J001680. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
4wd light blinks. When vehicle is in 2wd, light blinks
Have looked up the problem and it seems the freewheel front differential solenoid valve is wrong … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
160 satisfied customers
While driving after periods of time for no reason my gearbox
Hi, while driving after long periods of time for no reason my gearbox shifts into Neutral. The "N" and "D" light's are on and the car is in Neutral. If you shift back to Netural then out again it seem… read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
Car is running and keys are out. Won't open. It's cold. 2015
To open with fob and other door with key. Car is running … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
160 satisfied customers
2002 Montero will operate in Reverse, bit won't go into gear
2002 Montero will operate in Reverse, bit won't go into gear in Drive. … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
2001 3.0 spyder oil leak, I replaced valve cover gasgets,
2001 3.0 spyder oil leak , I replaced valve cover gasgets , oil on outside of power steering hose , oil burning off rear exhaust manifold after long up hill pull and idling I cannot find source of lea… read more
Mechanic01
Mechanic01
1,716 satisfied customers
I have a 91 montero. The turn signals just quit working. I
I have a 91 montero. The turn signals just quit working. I suspect the flasher, so bought a new one, but can't find anything that looks like it under the dash.… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,436 satisfied customers
Should I buy a brand new mitsubishi outlander SEL 2018. Is
Should I buy a brand new mitsubishi outlander SEL 2018. Is it an improved version of the car. I have heard there has been issues with reliability, but this one comes with a bumper to bumper warranty f… read more
Kavey
Kavey
86 satisfied customers
My check engine light is flashing for a time and then goes
My check engine light is flashing for a time and then goes solid then back to flashing. truck sounds ok except for a ticking sound when accelerating … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x