Question about 1998 Honda Civic

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1992 toyota paeseo,121,000 miles,engine runs good and idles good,but when you turn the a/c on the rpms go from 600rpm to 2,000rpm.No other problems except this.

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If you look on the back of the intake manifold by the firewall you will see a vacuum diaphragm with a spring and a small plastic bolt sticking out of it turning the plastic bolt adjusts the idle while ac is operating

Posted on Sep 27, 2009

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My ford escape 2008 hybrid suddenly runs at higher rpms and idles at 1500 rpms. yesterday it worked fine and idled at 1100 rpms


You need the engine computer scanned for faults first, if nothing shows up you likely have a problem with the transmission, likely it is not shifting into overdrive.

Feb 02, 2017 | Ford Cars & Trucks

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My Toyota corolla 94 is not working when I start the engine then after a few minutes reading will goes up top 600rpm


running, not reading; what engine option? Cyl count and displacement?
Is the CEL glowing key on, then turns off running> (check engine lamp)?
the engine RPM is too low. ok that is bad.
this is caused by up to 50 reasons. (flooding and misfire huge list )
ill just post the basic physics reasons.
(Classic, good compression, spark and fueling)
no fuses blown?. and 12vdc reaches all EFI parts. (weak battery is no go)
In generic form as there many engines used on corolla world wide.
1: low compression , less than 150psi on all 4. (if not V6)
if engine has cam belt? it slipped.
2; weak spark causing misfire, tune ups never done each 60k miles.
3: bad fueling. (too much is flooding misfire, if too little it starves)
4; EGR stuck open , we clean these ever 60k mile.
if it sticks open, idle will fail. (goes low) for sure.....!
5: the ISC sticks closed, same deal; so it gets cleaned.

The first thing to do is a tuneup per the FSM and operators guide.
the 60k it's called, do that and spark is good and fuel pressure returns.

this post assumes engine has full power at all times.
if not , better explain that, in details.

there are simple tests for all the above, $100 max i tools.

Feb 13, 2014 | 1994 Toyota Corolla

1 Answer

Will not idle some times and wil at other times it has 389000 miles 1992 toyota pickup with 2.4L


400k, your lucky it even moves.
really
what does not idle mean? and hot or cold engine or both?????
stalls
below 800 hot.
too fast idle. what?

Feb 04, 2014 | 1992 Toyota Pickup

1 Answer

The oil light comes on when the car gets warmed up and is in idle, about 600rpm. Any slight increase in rpms and the light goes out. Oil level is OK. The car has 166,500 miles. Should I worry about this?


YES. You dont say what engine you have? but the 2.7L HAS LOTS OF PROBLEMS. there were some problems with oil sending units for these cars, oil sludging, and timing chain. Have the oil pressure verified with a mechanicl oil pressure gauge, if its low, think about trading it in on another car.

Sep 27, 2011 | 2002 Chrysler Sebring

2 Answers

I have a 1992 Chevy pick up 1500 series. 350 engine. The idle is running low on it, were and how can I adjust it?


If the vehicle has a automatic transmission, check the Neutral Safety Switch. If defective from wear it could be sending incorrect signals to the Electronic Control Module which in turn sends signals to the Idle Air Control. It will make the computer think the transmission is in gear and lower the RPMs and then when the transmission is actually in gear the physical load will lower the RPMs even more. To check, set the parking brake and move the gear selector to Neutral and check the RPMs to see if the engine maintains a constant 650 +/-. Next, shift to Drive and check if RPMs drop to and maintain 500 +/-. If it does then you have diagnosed the problem. The original equipment Idle Air Control motors rarely wear out.

Aug 05, 2010 | 1992 Chevrolet K1500

1 Answer

How can I to change or regulate the RPMs in my toyota echo 2001. After a clean in the iac valve the RPMs of engine were changed in idle acceleration I hear that the engine is more accelerate that before of...


Idle is controlled through the on board computer and is not adjustable, however after u cleaned the system you need to disconnect the battery for 5 minutes and then let the system relearn the idle speed, this takes about 30 miles of driving a combination of city and highway.

May 07, 2009 | 2002 Toyota ECHO

2 Answers

RPMs drift up 200 to 300 rpms when idleing and when in cruise


Problem solved by the dealers service department. Thanks

May 07, 2009 | 2002 Jeep Grand Cherokee

2 Answers

1992 SE maxima jerking, sputtering, stalling


I had a similar problem and resolved it by replacing the mass airflow sensor. Ive got 235k+ miles on my 1992 Maxima SE.
Still runs good but having problems with the alarm system.

Jan 27, 2009 | 1992 Nissan Maxima

1 Answer

Oil psi


yes that is fine for a stock engine u should have 10 psi for every 1000 rpm and oil grades and weather play a big part on oil pressure

Dec 27, 2008 | 1998 GMC Sierra

2 Answers

1991 Camaro


not a oo2 but maybe a IAC (idle air controll ) you should try and clean it with carb cleaner before replacing it.

Sep 17, 2008 | 1992 Chevrolet Camaro

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