Question about Hyundai Motor 1998 Accent

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The RPM meter always read over 1500 rpm .. and the check engine lamp always on ..why

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The check engine light comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.

Posted on May 14, 2010

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2008 ford ranger 2.5, what could be the problem if engine starts normal but after second the engine fluctuate?


Bleeding the fuel system is typically only needed on high pressure systems like GDI and Diesel vehicles, and only to get them to start if they run dry once.
If your engine keeps running but the idle speed moves up and down there are many things that can cause that. More information is always helpful. Does it always do it whenever the car is running? Or does it only do it conditionally (IE Only when 1st started in the morning, only after warmed up or getting off the dreeway, only with AC on or at night...describe as much as you can.)
Most newer cars have computer controlled idle strategy that wants to idle the car cold around 1000-1500 rpm (After an initial higher rev called a FLARE) and then bring it down in 3 or 4 minutes to 700ish rpm. If it CANNOT bring it down by normal means, then many resort to something called FUEL CUT IDLE where it actually turns off the fuel momentarily and the RPM will drop because the car is stalling and running out of gas...then back on and it starts to rev back up and when it gets too hiugh it turns back off. Cars that do this can have annoying surges from 500-2000 back and forth at idle forever.

a vacuum leak or MAF meter problem can cause rough idle. ALmost any engine code that turns on CHECK ENGINE lamp may be suspect, does it have any current fault codes?

As well, consider Sticking manifold runners, EGR systems, and temperature sensors all can cause surging, so can a defective Oxygen sensor, slightly jumped timing, and dirty throttle plates the ECM wants to close more but they wont due to dirt. If its not something fairly obvious, it may require deeper checking.

Jan 29, 2015 | 2008 Ford Ranger 2.5

1 Answer

Warning lights not going out


this a 1996 Toyota Hilux??????????
is RPM at 300? or 800,. 300 is bad idle and alt will fail there.
water level, ,
timing belt? (no way on any 96 !!!)
oil level in 1996, ? ahhh you think pressure is level , gotch.
what country is this. ive not seen all 50 country Hilux.s ever.
its not USA car. so?????

check engine RPM
if dash has RPM this is easy, 800 good, lower bad
cold engine RPM is about 1500 and drops to 800 hot.
is this car EFI or CARB, many cars not in USA are carb up to 2001.
to get best help. for all engine issues.
  1. Post your Country, is that so hard,. not one poster ever did.?
  2. Post engine type, most cars have 3 engine options,, land-cruisers 12 engines. world wide.
  3. List all engine related symptoms, misfire , bogging stalls, and engine shaking or low idle RPM or too high,
  4. check all fuse and report the status of the CEL lamp, key on CEL glows, and running stays off. if not insert the check jumper and read the flash codes, CEL on running means the ECU wants to tell you what and why tests fail.. listen to it or fail.

Feb 21, 2014 | 1996 Toyota Hilux

1 Answer

Speedo meter is not working


engine runs perfectly?
trans shifts automatically perfectly (shoe drops)
engine rpm at or above 800 rpm?
head lamps not dim?
OD is trans failure.
ABS means ABS failure or engine stalled.
CHECK lamp means bad engine, or engine stalled.

if the CHECK engine light comes on
that means ,time to scan the PCm.
any shop or auto store here in usa can do that.
so can you here , even barrow the tool from most autostores.

CHECK means the PCM sees errors, and wants to tell you them.
so look.

Feb 11, 2014 | 2002 Toyota Avalon

1 Answer

Battery light


no year, model, 2x failure. hopeless, we can not see your car. so....
tell what dont work.
i get in car.
i want to start it. it does or does not.?
it does start and RPM is 1000 to 1500 rpm good? cold engine.
it does start and RPM is 400 and stalls. or not.? bad.
say at want point in the process of driving, you get issues.
state them, and what are all indicactions,
running RPM
Speed
gear selected.
I/P cluster lamps, at the bad point.

Jan 19, 2014 | Honda Cars & Trucks

1 Answer

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.../????

Nov 28, 2013 | 1994 Honda Civic Del Sol

1 Answer

05 Suzuki XL7 wouldnt sart. Then started and idled up to 3000 rpm and back down. Batt light, air bag light, ck engine light, and 4wd flashing. In reverse it accelerated on its own. Depressed gas pedal in...


id go for chicken feet and blood and voodoo , sessions.....loL

first off, i see an illegal fast idle ,
and all A/T trannys do that, when the engine rpm fraks up.
to move car, due to the stall speed rules of the clutch torque converter (aka ,the fluid clutch) wiki clutch stall speed.

that A/T weakness, is why folks run over kids. (the lame excuse)
starting a car with foot off the brake is , folly, thus the lock all outs called park lock features.

i can not follow your sequence of events.so will ask questions.
1: I start the engine, its don't want to but does. (ever tune it up?)

2: Does the CHECK engine lamp go out (CEL/SES)? running.
for sure, if the engines stalls many lights will glow in the cluster but that is normal, see? for any stall.!
The Charge light comes on anytime the Alternator goes dead
or hits near 0 RPM (stalled)
so are you saying at 3000 rpm, the charge lamp came on.
/??????
battery lamp is not battery, its really a Charge lamp.
the op guide states that too.
on my car I have a battery gauge too, and shows VOLTS.
at idle its 14v. its 14v at all rpm. if less, say so.
I have 2004. GV. with full manuals. even factory FSM. ++++++

ok , in drive, no acceleration, are you saying ,
1: im in A/T drive.
2: the engine is idling at 800 RPM hot or near 1500 cold
3000 is wrong, dead wrong, you in ALASKA, state location(gen)

i increase the RPM with my right foot and the car don't move
in DRIVE
as RPM rises above 1500 RPM, you do have a tacho , i see that.
if it does not move with hgher RPMs, the trans is bad or its TCM is bad.
on your car the TCM is hidden deep inside the PCM. back in 1997.

the PCM runs the engine and tranny today.
if something lies to the TCM/PCM the tranny will not go into drive.
on newer 96+ cars, you see the check engine lamp glow.
running (not stalled, stalling this CEL glows all the time)
but running, the CEL glowing means Faults found, scan me,. please.
eg:
so you scan it, and find DTC's stored (many?) eg.... in english...
the transmission selector switch is bad. or worse.
not using a scan tool ,means ($7 cost) means you miss all the facts. hard cold real facts.
the ECU can not shift any car with a bad selector switch.
so throws the DTC error.
it can be even be a loose selector cable, cave man simple.

recap.
does the CEL lamp stay out running at all times.
no, ? then scan it.
do not post car problems with stored, or pending DTCs on any car newer than 1995. or its just wild guessing.. mostly.

Aug 04, 2013 | 2002 Suzuki XL-7

3 Answers

Headlights flickering consistant with engine RPM. also, battery light on dash flickers with RPM


Your alternator is worn or the voltage regulator (usually built into most modern alternators) is failing.

Mar 01, 2010 | 2000 Mercury Cougar

1 Answer

98 Lincoln Navigator Check Eng light on


fuel pump is going out causing the truck to run lean and miss

Aug 22, 2009 | 1999 Lincoln Navigator

1 Answer

Cold idle is right at 2k rpm.


could be a vacume leak. check hose for cracks or lose conections.

Jun 13, 2009 | 1997 Land Rover Discovery

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