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Amedee
Amedee, Former ASE Master Tech
Category: Car
Satisfied Customers: 25235
Experience:  ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
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Suzuki XL-7: Check engine light just came on in my car and

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Check engine light just came on in my car and we put a machine to check the codes and the codes are 171 and 174 and the manual says to lean? Trying to figure out what the problem may be?

AMEDEE :

Hello and welcome to Just Answer! My name is XXXXX XXXXX I can assist you with your question.

AMEDEE :

Please allow me to ask a few questions about your vehicle to better help resolve your concern.

AMEDEE :

What year is your vehicle?

AMEDEE :

Could I get the VIN by chance?

Customer:

1983

AMEDEE :

Can I get your VIN?

Customer:

May I ask what you need that for?

AMEDEE :

This will tell me the year, make and model as well as the engine size

Customer:

1983, Suzuki XL7 V6

AMEDEE :

A 1983 suzuki computer will not flag these codes

AMEDEE :

Please get me the VIN

Customer:

JS3TX92V234106521

AMEDEE :

Thank you!

AMEDEE :


2003 Suzuki XL-7
AMEDEE :

This is NOT a 1983

Customer:

Sorry I meant 2003. I guess my mind is in 1983

AMEDEE :

no problem

AMEDEE :

I was a bit confused..

AMEDEE :

Back in 1983, I dont even think you could pull codes from these vehicles

AMEDEE :

they did not even make an XL-7 in 1983

AMEDEE :

anyway

AMEDEE :

do you know what these codes are?

AMEDEE :

Or are you looking for some information on what these codes are?

Customer:

I'm trying to find out what they mean, or what I might have to fix.

AMEDEE :

They mean the engine is running too lean

Customer:

Yes that is what it says

AMEDEE :

This is caused by either a bad mass air flow sensor or a vacuum leak.

AMEDEE :

This means, you will have to fix any vacuum leaks and or replace the mass air flow sensor

Customer:

My husband was thinking fuel filter or pump?

AMEDEE :

Does it start hard?

Customer:

It starts ok just seem to run really rough.

AMEDEE :

Is this just at idle or even above idle?

Customer:

Mostly when it idle's

AMEDEE :

Honestly, this is usually just a vacuum leak

AMEDEE :

Does it have plenty of power under a load?

Customer:

Yes

AMEDEE :

Then I would suspect that the fuel pump is working

AMEDEE :

if you have a weak fuel pump, you will have low fuel pressure

AMEDEE :

if the fuel pressure is low, you will have a severe power loss issue

AMEDEE :

I think the fuel pump is good

Customer:

Thank you so much for your help we will check those things out.

AMEDEE :

Your welcome

AMEDEE :

One more thing

AMEDEE :

Have him check the fuel pressure regulator

AMEDEE :

this is locate on the fuel rail on the engine under the hood

AMEDEE :

there is a vacuum hose or line going to it

AMEDEE :

have him remove the hose/line going to the regulator

AMEDEE :

with the engine off

AMEDEE :

if there is any fuel in the hose/line

AMEDEE :

the regulator is bad and will need to be replaced

AMEDEE :

if that checks out good

AMEDEE :

I would look for a vacuum leak next

AMEDEE :

if all checks out good

AMEDEE :

I would suspect a bad mass air flow sensor

AMEDEE :

Does that help?

AMEDEE :

Hello?

Customer:

Yes thank you so much.

AMEDEE :

Your welcome

AMEDEE :

one more thing

AMEDEE :

I just need to know if you happy with my answer?

Amedee and 5 other Car Specialists are ready to help you

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