Question about 1987 Toyota Supra

1 Answer

Car starts up at 2500 rpm and does'nt go down when it warms up, i change the isc and thats when it started. any suggestiopns

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 288 Answers

If the ISC is bought brand new even though its new could go bad meaning it could be defective from the manufacturer from them from the start. You should also use a timing gun to check to see if the timing is where it should be at at idle speed of car. you could also use carb cleaner where it might be sticking at.

Posted on May 23, 2011

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

When air conditioner clutch engages it pulls down all vehicle voltage and belt and clutch start to slip


belt worn, loose or idler pulley weak --compressor clutch binding,moisture in system ,compressor internal damage

Jul 19, 2015 | 2000 Jeep Grand Cherokee

1 Answer

Engine idles up to 2500 and after 5 or 7 seconds, goes back down to 1200 rpm 2002 escort SOHC


Clean out the throttle body carefully and replace the auxilliary air idle valve. There is a resetting process for this valve so dont just fit and hope!
Check on Google or forums but i think ...when fitted you turn on ignition but dont start car , then put the accelerator pedal slowly to fully open, hold it for a min then release. start and drive car until warm and the recheck.
If the idle is high then settles it is not an air leak. It is something stuck that then releases which is only throttle flap or idle valve. It is always a goid idea to replace fuel, oil, air filters on normal service intervals.
Roger

Apr 22, 2014 | 2002 Ford Escort

1 Answer

Idles@2500 rpm until engine warms up


old post
all do, everyone. but. the devil really is in the details with EFI.
this IAC valve does that,
to speed it up warm up , put in a 195F thermostat.
this assumes 800 RPM is hot.
most of these engines, do this. new. bewlow.

1: cold start, for 3 to 15sec, 2500 rpm , worse in alaska.
2: then the above DASH pot closes and IAC takes over, at ~1200
3: then as engine heats the IAC closed inch by micro inch a
its now 100% closed and the ECU not controls idle hot.
using the modulated ISC,
there is a fast idle feature on this year, 950 to1000 rpm hot
with these turned on.
1. headlights hot.
2: defrost glass, rear.
3: heater fan on.
4: a/c on if opted.
other wise 800 is normal hot.

Jan 13, 2014 | 1989 Geo Tracker

2 Answers

1996 honda will not start under 60 degrees


tune it up. (fresh spark parts work best in cold and for sure damp wheather.
fresh gas?
leaking injectors?
isc stuck closed, and rpm low, hot?

the ecu, anticipates the next cold start,
it knows how much to open the iSC valve, to get a good start cold
and if colder to day, it opens more. (math)
if it (ISC) is gummed up,fas all do, it cant start right
so next time, try %10 throttle, starting, emulating a good ISC.
see?

Jan 07, 2014 | 1996 Honda Accord

1 Answer

Idles fast problem


That would be your engine "choke" functioning. It's not a problem. The choke engages when engine is cold and shoots extra fuel to the cylinders to idle the engine up especially in cold with. Once the engine has sufficiently warmed up, the engine will idle back down.

Jun 20, 2012 | 1987 Honda Accord

2 Answers

Chevy Malibu Cold Idle Problem


Check the water coolant thermostat. If it is stuck in the "open" position you are heating up all the water in the coolant system and this will take time. The thermostat keeps the water in the engine until warmed up to almost normal running temperature, only then does it allow the coolant to enter the radiator.

Apr 05, 2017 | 2003 Chevrolet Malibu

1 Answer

2000 grand cherokee limited, when I start it up it idle's very high about 2300 rpm and then gradualy work its way down, but it never settle to a stedy idle, even if the car is warmed up. If you gi


your throttle body sensor may be bad. first get a can of spray carb or fuel injection cleaner and spray it in the opening for the intake for the throttle body. this will clear out the carbon build-up. when you crank it it will run shaky but shoiuld clear up within a minute

Jan 03, 2012 | 2002 Jeep Grand Cherokee

1 Answer

My 1997 Chrysler Concord idles at 2500 to 3000 rpm when first started and when it warms a little it idles at 2000 rpm and stays there. When I start it right after I turn it off, it starts at 2500 rpm then...


Maybe a short to the TPS or something shorting it out. There's also the IAC that really controls the idle but usually it will cause the RPM's to go up and down a little erratic if bad. The MAF sensor can cause major problems as well but since you already swapped the TPS and it helped and then stopped I would focus on that sensor and especially it's wiring to and from the ECM. Be careful with the sensor signal wire to the ECM can blow it if more than 5v passes or spikes.

Sep 03, 2010 | 1997 Chrysler Concorde

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

60 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8210 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...