What is Atom?
Engine runs rough above 40 mph
Hello Guest		   
  • Login
• Register…
• Start blog		   • Who, Where, When
• What is interesting here?
• Duels		   • Polls
• Avatars
• Interests		   • Cities and Countries
• Random blog
• Users search		   • Search
• Games
• Tests
• CarGuru		   • Ñîîáùåñòâà
• Talxy Chat
• Horoscope
• Online		  
Register!
CarGuru > Open discussion > Engine runs rough above 40 mph 9 May 2005 18:44:02
  Recent blog posts: 
95 mirage
I have a 95 mirage and this is the second time the injector in number 3 cylinder has gone bad. Anything…

1988 Ford F-150 Truck
I would like to remove the pollution control system from my 1988 F-150, 4.9L I6 300 4x4. Can anyone…

my 99 M chrysler has started to…
my 99 M chrysler has started to cool and then starts to give off heat in the ac vents and then cool…

dodge 2000 intrepid
bought this car right off the show room floor in Bartow fl to this date I have not had any work done on…

starting issue, 2002 dodge…
My 2002 Dodge Caravan wouldn't crank. I tested some things, replaced the battery. After installing the…

stereo pin
I put a new battery in my girl friends 94 900 and it wants a code for the radio. There is nothing in the…

Coolant temp on Saturn Sky
I just purchased a 2007 Saturn Sky Redline. As I was driving yesterday I happen to have the info set on…

Que pour la place trange
Que pour la place trange

ha ha ha... loh mlya....da…
ha ha ha... loh mlya.... da, da... imenno you!!!!

da da da.....
da da da.....

  They have birthday today: 
YJlady
  Forums:   
    topic feeds

• CarGuru  all topics, blogs and comments

• Driving

• Formula-1

• Indycar

• Nascar

• Other sport

• Technology

• 4 x 4

• Volkswagen

• Mercedes

• Acura

• Alfa-romeo

• Audi

• BMW

• Chrysler

• Dodge

• Ford

• General Motors

• Jeep Willys

• Honda

• Hyundai

• Mazda

• Nissan

• Peugeot

• Pontiac

• Porsche

• Saab

• Saturn

• Toyota

• Volvo

• Buy / Sell

• Open discussion

• Anonymous
  Discuss: 
How to duplicate Navtech CD’s
Considering that Navtech doesn’t want to support further updates of the older CD format, I don’t see any…

air noise on a 2009 Gm Tahoe
2009 tahoe, driving at 42 miles an hour I get air noise, inside the vehicle. This is not engine noise I…

Hello
Hello!

Car takes time to start
I have a rover 216 softtop it has the 1600cc dohc honda engine.the car starts first time all the time…

88 honda civic surging/stalling
My 88 honda civic wagon surges intermittently( feels like the car is rocking back and forth rythmnically…
  Recent forum topics: 
...96 Accord tranny issue
I have a 1996 honda accord ex automatic. on a cold start the car shits gears realitively fine. however…

i just want to find out how…
i just want to find out how much it will cost to change an ignition to a 2001 pontiac grand am and can i…

What is causing my 97 Toyota…
What is causing my 97 Toyota Camry to hesitate like it is about to stall?

94 Dodge Intrepid
How do I go about finding and unsticking or replacing the gas float on a 94 Dodge Intrepid. I ran out of…
  Recent forum comments:
RE: stuck hatchback
on the rear gate that is

RE: stuck hatchback
just my latch is stuck and the door wont close on my 2000 sub outback limited

RE: 1999 Chrysler T&C - Speed…
I am reading all of this and am amazed at how bad I am getting ripped off by my Chrysler dealership....4…

RE: How to duplicate Navtech CD’s
where can i buy nav cd's for a 2003 s class mercedes also the latest version for a 2005 sl?

RE: Mitsubishi Diamante ECU faults…
how did you read the codes

RE: Re: Road test - DMV is cracked
Well, I passed on the 4th roadtest. The examiner said I should have passed it the first time. I have…

RE: turn signal problams
Try a new flasher because it's cheaper. If that doesn't work then you probably need a new turn signal…

RE: Chevy 305 Timing Chain…
Sprucing up a low mileage 305 chev. Crank sprocket has one keyway. Looking at the front end how many…

RE: 95 maxmia
my 95 Nissian Quest jerks A Lot:-?­ when it warms up and I push on the accelerator, I was told…

RE: 4x4 usefulness
I live in the mountains of colorado, and most of the time I am able to get by with my very powerful…
  Ìîäåðàòîð:
 Administrator

Engine runs rough above 40 mph

M Long via CarKB.com 3 May 2005 16:40:15
 I have a 1991 Lexus es250 126000 mile engine that runs rough above 40 mph
for a while, then runs smooth, then runs rough. Mechanics tuned it up and
replaced spark plugs,ignition wires, distributor, rotor, air flow meter,
air filter, alternator belt. None of which solved the problem. Thanks for
any suggestions.
Add comment
Blk Knight 3 May 2005 17:04:22 [ permanent link ]
 See if there are any codes stored in the computer, could be a sensor.

--
Ed Smith"I came into the world with nothing and I still have most of it"
"M Long via CarKB.com" <forum@nospam.CarKB­.com> wrote in message
news:b5ec3da592a54f­e3ad861796e15e97da@C­arKB.com...>I have a 1991 Lexus es250 126000 mile engine that runs rough above 40 mph> for a while, then runs smooth, then runs rough. Mechanics tuned it up and> replaced spark plugs,ignition wires, distributor, rotor, air flow meter,> air filter, alternator belt. None of which solved the problem. Thanks for> any suggestions.


Add comment
M Long via CarKB.com 4 May 2005 06:51:18 [ permanent link ]
 There are no codes stored

--
Message posted via http://www.carkb.co­m
Add comment
Mrcheerful . 4 May 2005 15:31:53 [ permanent link ]
 
"M Long via CarKB.com" <forum@nospam.CarKB­.com> wrote in message
news:b5ec3da592a54f­e3ad861796e15e97da@C­arKB.com...>I have a 1991 Lexus es250 126000 mile engine that runs rough above 40 mph> for a while, then runs smooth, then runs rough. Mechanics tuned it up and> replaced spark plugs,ignition wires, distributor, rotor, air flow meter,> air filter, alternator belt. None of which solved the problem. Thanks for> any suggestions.

internally broken exhaust, esp. cat converter, may give those symptoms.
have you had the fuel filter changed, again that is a possibility.

mrcheerful


Add comment
M Long via CarKB.com 5 May 2005 00:56:05 [ permanent link ]
 Check engine light came on today when I got to 55 mph. It was codes
25 and 26. According to the manual, codes 25,26 have the following in
common;engine ground bolt loose,open or short in injector circuit, fuel
line pressure,open or short in oxygen sensor circuit,oxygen sensor,water
temp sensor,foreign object caught in valve, and ECU.
What would be the most likely cause?

--
Message posted via http://www.carkb.co­m
Add comment
Ray O 5 May 2005 01:33:25 [ permanent link ]
 
"M Long via CarKB.com" <forum@CarKB.com> wrote in message
news:7146a65b044f49­d3b3778509268a485c@C­arKB.com...> Check engine light came on today when I got to 55 mph. It was codes> 25 and 26. According to the manual, codes 25,26 have the following in> common;engine ground bolt loose,open or short in injector circuit, fuel> line pressure,open or short in oxygen sensor circuit,oxygen sensor,water> temp sensor,foreign object caught in valve, and ECU.> What would be the most likely cause?>
-- > Message posted via http://www.carkb.co­m

Most likely causes are oxygen sensor and loose ground bolt/poor connection
to ground.
--
Ray O
correct the return address punctuation to reply



Add comment
M Long via CarKB.com 5 May 2005 04:40:49 [ permanent link ]
 I ordered an O2 sensor for $67.00. With 126000 miles I guess it needs to be
replaced good or bad. Hopefully this is the problem. Thanks for your
suggestion.

--
Message posted via http://www.carkb.co­m
Add comment
HarleyVA@nospam.net 5 May 2005 05:52:49 [ permanent link ]
 On Wed, 4 May 2005 16:33:25 -0500, "Ray O"
<rokigawa@tristaras­sociatesDOT.com> graced this newsgroup with:
"M Long via CarKB.com" <forum@CarKB.com> wrote in message >news:7146a65b044f4­9d3b3778509268a485c@­CarKB.com...>> Check engine light came on today when I got to 55 mph. It was codes>> 25 and 26. According to the manual, codes 25,26 have the following in>> common;engine ground bolt loose,open or short in injector circuit, fuel>> line pressure,open or short in oxygen sensor circuit,oxygen sensor,water>> temp sensor,foreign object caught in valve, and ECU.>> What would be the most likely cause?>>
-- >> Message posted via http://www.carkb.co­m>
Most likely causes are oxygen sensor and loose ground bolt/poor connection >to ground.


also your mass airflow sensor...probably with that mileage, it's
dirty.
Add comment
Ray O 5 May 2005 07:45:29 [ permanent link ]
 
"HarleyVA@nospam.ne­t" <bounce@bounce.net>­ wrote in message
news:i2vi71tioqetio­9cgp6f9icildqc9k5dje­@4ax.com...> On Wed, 4 May 2005 16:33:25 -0500, "Ray O"> <rokigawa@tristaras­sociatesDOT.com> graced this newsgroup with:>
"M Long via CarKB.com" <forum@CarKB.com> wrote in message>>news:7146a­65b044f49d3b37785092­68a485c@CarKB.com...­>>> Check engine light came on today when I got to 55 mph. It was >>> codes>>> 25 and 26. According to the manual, codes 25,26 have the following in>>> common;engine ground bolt loose,open or short in injector circuit, fuel>>> line pressure,open or short in oxygen sensor circuit,oxygen sensor,water>>> temp sensor,foreign object caught in valve, and ECU.>>> What would be the most likely cause?>>>
-- >>> Message posted via http://www.carkb.co­m>>
Most likely causes are oxygen sensor and loose ground bolt/poor connection>>to ground.>
also your mass airflow sensor...probably with that mileage, it's> dirty.

Good point!
--
Ray O
correct the return address punctuation to reply


Add comment
Ray O 5 May 2005 07:46:28 [ permanent link ]
 
"M Long via CarKB.com" <forum@CarKB.com> wrote in message
news:912ec2889a3841­80870e87f89e25ac5d@C­arKB.com...>I ordered an O2 sensor for $67.00. With 126000 miles I guess it needs to be> replaced good or bad. Hopefully this is the problem. Thanks for your> suggestion.>
-- > Message posted via http://www.carkb.co­m

To clarify, I doubt if the O2 sensor would cause the engine to run rough but
it cold solve the check engine light.
--
Ray O
correct the return address punctuation to reply


Add comment
M Long via CarKB.com 5 May 2005 16:04:16 [ permanent link ]
 The air intake sensor was replaced with the air flow meter. Also about 10
months ago the fuel pump,fuel filter and gas tank were replaced.The gas
tank had rusted and clogged the fuel lines. The gas tank was replaced with
a used gas tank.

--
Message posted via http://www.carkb.co­m
Add comment
Ray O 6 May 2005 09:59:40 [ permanent link ]
 
"M Long via CarKB.com" <forum@CarKB.com> wrote in message
news:79232656b88147­248d987dc12ae1a895@C­arKB.com...> The air intake sensor was replaced with the air flow meter. Also about 10> months ago the fuel pump,fuel filter and gas tank were replaced.The gas> tank had rusted and clogged the fuel lines. The gas tank was replaced with> a used gas tank.>
-- > Message posted via http://www.carkb.co­m

I forget what type of vehicle you have, but an air intake sensor serves the
same purpose as an air flow meter. I doubt if your car has both.

Are the ignition wires and spark plugs OEM parts or aftermarket parts?
--
Ray O
correct the return address punctuation to reply


Add comment
M Long via CarKB.com 6 May 2005 20:30:41 [ permanent link ]
 A mechanic installed the wires, they have Japanese letters on them.I was
going to replace them myself until I saw I would have to remove the air
intake chamber to get to the 3 in the back. Looking at the manual for my
1991 Lexus ES250 page FI-37, the air flow meter has an air temp sensor
built into it. The O2 sensor should arrive today so I'll see if it fixes
the problem. Also could the PCV valve cause this problem?

--
Message posted via http://www.carkb.co­m
Add comment
Ray O 6 May 2005 21:05:24 [ permanent link ]
 
"M Long via CarKB.com" <forum@CarKB.com> wrote in message
news:90d86bbce56e4a­7584e1d36d1739609a@C­arKB.com...>A mechanic installed the wires, they have Japanese letters on them.I was> going to replace them myself until I saw I would have to remove the air> intake chamber to get to the 3 in the back. Looking at the manual for my> 1991 Lexus ES250 page FI-37, the air flow meter has an air temp sensor> built into it. The O2 sensor should arrive today so I'll see if it fixes> the problem. Also could the PCV valve cause this problem?>
-- > Message posted via http://www.carkb.co­m

Genuine Toyota/Lexus ignition wires will say Toyota or Lexus or Nippon Denso
or ND. Come to think of it, I don't think genuine Toyota/Lexus wires have
Japanese writing on them.

I'm not sure why, but Toyota/Lexus seem to run poorly on aftermarket
ignition parts - plugs, wires, rotor, etc. Many of these kinds of
driveability problems are solved by installing OEM ignition parts.

I suspect that what you think are Japanese letters are actually Chinese.
Many of the 8,000 characters are identical in Japanese and Chinese so
someone who cannot read either language would have a very difficult time
telling the 2 apart.

I thought you had called it an air flow sensor, not an air temperature
sensor. A bad air temperature sensor is unlikely to cause the drivability
problems you are describing.

I doubt if replacing the O2 sensor or PCV valve will solve the problem. I'd
start with genuine Toyota or Lexus ignition wires and plugs, cap, and rotor.
Also, make sure that the base ignition timing is correct and that it is
advancing correctly.
--
Ray O
correct the return address punctuation to reply


Add comment
Jyrki Alakuijala 9 May 2005 18:44:02 [ permanent link ]
 Ray O wrote:
I doubt if replacing the O2 sensor or PCV valve will solve the problem. I'd

My Lexus LS 400 1994 had the same symptoms. I replaced the PCV and
changed the air filter. No improvements. I had two faulty O2 sensors,
ignition wires and plugs replaced by the official Lexus shop using
official parts. The engine seemed to run rougher below 1500 rpm than
before, but had no problems above 75 km/h as it used to. I guess the
O2 sensors were the most important factor in the improvement. However,
gas consumption went up from 13 l / 100 km to around 14.5 l / 100 km
when the "repair" was done.

Now, after about 6 months and 5000 km, the symptoms are back. Car
runs a bit rough above 60-75 km/h.

Next, I am planning to replace the throttle position sensor (or actually
swap the "unused" TPS from the ESP with the normal throttle TPS). Is
this a good idea?

Emissions measurements (3rd party) were fine before and after the
repair.

If someone knows the proper fix for this, I would be very pleased to
hear about it.
Add comment
 

Add new comment

As:
Login:  Password:  
 
 
  
 
respect your talk pals, avoid using obscene language, typing entire messages in CAPS, posting buy/sell ads or violating netiquette or the RF Criminal Code..

CarGuru > Open discussion > Engine runs rough above 40 mph 9 May 2005 18:44:02
see also:
ASCS: Rocky Mountain Thomas County…
ALLSTAR: Brushcreek results 2005-09-04
NHRA: Indianapolis: Larry Dixon final…
pass tests:
see also:
Help!....Nissan Xterra 2002 Trans?
  Copyright © 2001—2009 Car-Guru
Idea: Miñhael Monashev
See Help and FAQ in the community support.car-guru.com.
Write in the community about the bugs you have noticedbugs.car-guru.com.
Write your offers and comments in the communities suggest.car-guru.com.
Information for parents.
Write us at:
If you would like to report an abuse of our service, such as a spam message, please .