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Our 2015 model E90HSLAF, purchased new, has always "surged" at 1500 to 3000 rpm. Local Evenrude dealer can't figure out what is wrong.

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Replace cabin filter


I replace them in another brand of car.
In that one, you take the glove box cover loose, and the cabin filter is behind a door in the rear of the glove box.
A local Mazda dealer parts department should tell you where the filter is.
A local junk yard could also help you find it.
Oh, yes.
I buy cabin filters new on e-bay for $ 5.
At the dealer they are $ 50.
God bless your effrots.

Oct 19, 2015 | 2015 Mazda 3

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Will be purchasing a new 2015 Elantra. Should I purchase an extended warranty?


I would ask hard questions on this one I paid almost a thousand dollars for an extended warranty on a used car and six weeks later I had to tow the car in. I showed them the warranty paper work and they answered oops it does not cover the computer and parts. It was running parts only like engine and tranny.

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Throttle surge at idol


surge, great post, what engine displacement.
open hood (my answers are USA only) look up, see big white
sticker that is the engine vacuum and type engine sticker)
surge hot or cold? engine.
if it surges hot, that means :
1: ISC system out of control , it job is to stop surge and 5 more things.
2: the engine is way lean and cause ISC to loose control

just 2 reasons, and can be 50 things. wrong.
is the CEL lamp out running> if not, pull the DTC codes and post them. (all)
as a mech ,we find out which it is.
(i make sure my engine can hold closed loop at idle , if not and lean it will surge. (may)
we make sure the ISC works ok (not sticking, clean it)
and then test to see , that if by my forcing it closed, by hand (ask)
i can get way below 800 RPM. most do 500 but 600 is ok.
if rpm stays above 800 closed, that means you have huge
vacuum leak or TV blackage (too thight throttle cable?)

finding vacuum leaks can be horrific, task .
there are many tricks (and tests) to do this, ask.

see that logic above, If I the mech, can not drop rpm below 800
by hand, then no ISC on earth can. not now or ever.
and proves the induction has huge air leaks
or some dolt set the spark timing 20 degrees advanced.
see it.
so as always , a tuneup is first, then as always , i always check timing,and for proper advance rates.
advances engines at idle race way too fast and the iSC will just go NUTS.

ISC = Idle speed controller , that valve that has wires.
the IAC is a thermal device and no wires and it too can stick open
when the IAC sticks open the ISC goes , yes, nuts,
nuts can be surge (ECU is hunting it)
or just racing way too fast hot, say 1500 rpm.
a slow RPm can be a stuck open EGR (50k service point)
lean will cause too low.
too rich , misfires and too low
the ISC is the last thing to work right, all else must be good.

what does your CEL lamp do?

PS: most cars, if the ECU/PCM enters Limphome, it cuts all idle controls. again, the CEL lamp. glowing while running.../????

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1 Answer

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1 Answer

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It may be one of two things. A intermittent problem with the idle air control sensor or the throttle position sensor. Have the cars computer scanned at a local auto parts store to see if there is a pending code that has yet to turn on the check engine light.

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2 Answers

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You could have a bad or contaminated Mass Air Flow (MAF) sensor. You can get a used one online for less then 100. You can also purchase a can of MAF sensor cleaner at a local auto supplies store and clean it. It located right at the air filter housing.

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1 Answer

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Certainly sounds like the o2 sensors have become contaminated and are not acting as fast as they used to , or are supposed to.

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2 Answers

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i would tell the dealer u want a second opion bescause my 2004 cavlier idles sometimes high it it turned out to be the rpm were wrong

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1 Answer

Corolla 96 motot starts to cut and/surge in and out


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Nov 12, 2008 | 1996 Toyota Corolla

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