Jump to content
  • Welcome to AutoLanka

    :action-smiley-028: We found you speeding on AutoLanka Forums without any registration! If you want the best experience, please sign in. Safe driving! 

chathuu

Nissan Fb 14 Engine Run High

Recommended Posts

Hi Guys..

Im new to this,

i have trouble in my Nissan FB14 cos the engine runs fast at idle mode.

RPM indecates 2000-3000 @ idle. (RPM meter working)

when driving it does 8-10Kmpl (Avg).

Seems it would be better fuel consumtion.

What is the reason or is it normal..? :speechless-smiley-004:

Share this post


Link to post
Share on other sites

Check n clean IACV Valve.

Get MAF sensor & throttle body checked.

8-10 is normal based on Driving condition, Driving style and lot more factors.

But idle speed in neutral is not normal.

Share this post


Link to post
Share on other sites
Hi Guys..

Im new to this,

i have trouble in my Nissan FB14 cos the engine runs fast at idle mode.

RPM indecates 2000-3000 @ idle. (RPM meter working)

when driving it does 8-10Kmpl (Avg).

Seems it would be better fuel consumtion.

What is the reason or is it normal..? :speechless-smiley-004:

Does the engine settle at around 750-1000 after the initial fast idle mode?

Share this post


Link to post
Share on other sites

@Chathuu

If I may extend The Don's point above, please note the idle speed when you start the car in the morning (cold start) without AC on. Then note the idle speed when the engine reach its working temperature (ie temperature gauge in the mid range) again without AC. Also note the idle RPM value in your current ECO certificate and revert back with your readings.

Share this post


Link to post
Share on other sites
Does the engine settle at around 750-1000 after the initial fast idle mode?

@ The Don

Its not settle down.

Share this post


Link to post
Share on other sites
@ The Don

Its not settle down.

Think you should get it looked over by a specialist. There are well reputed specialists that won't cost you an arm and a leg. I too feel that it's something to do with the IAC valve since I too have the same issues. Like you, I didn't know what's wrong until I had someone have a look.

  • Like 1

Share this post


Link to post
Share on other sites
@ The Don

Its not settle down.

Like some have said the issue could be a number of things. The following is not an exhaustive list.

1. MAF sensor

2. The idle controller

3. Vaccume leak

4. Throttle body carboned out and the butterfly valve not closing properly

5. ECU

First thing to do is to clean the throttle body, clean the sensors in question, reset the ECU and run for a few days and check if the problem resolves itself. If your mechanic has a scanner, scan for errors as well.

Share this post


Link to post
Share on other sites
Like some have said the issue could be a number of things. The following is not an exhaustive list.

1. MAF sensor

2. The idle controller

3. Vaccume leak

4. Throttle body carboned out and the butterfly valve not closing properly

5. ECU

First thing to do is to clean the throttle body, clean the sensors in question, reset the ECU and run for a few days and check if the problem resolves itself. If your mechanic has a scanner, scan for errors as well.

Thanx lot..

Share this post


Link to post
Share on other sites

What I find weird is that your fuel consumption is normal for this car. But if it runs at 2-3000 rpm always the consumption should be much lower.

It could be a faulty tachometer, you never know. Try using an external tachometer and see if the rpm readings are accurate.

Edited by The Stig

Share this post


Link to post
Share on other sites
What I find weird is that your fuel consumption is normal for this car. But if it runs at 2-3000 rpm always the consumption should be much lower.

It could be a faulty tachometer, you never know. Try using an external tachometer and see if the rpm readings are accurate.

Stig, 2-3000 rpm is when idle. As soon as the car starts moving it becomes irrelevant and comes down because of the load on the engine. This is called an idle surge.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Register for a new account in our community. It's easy and FREE!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



×