UK Car

UK Car Repair Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

UK Car

I have a saab 9-3 1.8t approx 100K on the clock and has been

Customer Question
Hi, i have a saab...
Hi, i have a saab 9-3 1.8t approx 100K on the clock and has been serviced and now its cutting out for no reason.
JA: What year is your 9-3?
Customer: if it was a really old car i would say the points need to be done? 2006
JA: Are you fixing your 9-3 yourself? What have you tried so far?
Customer: i havent tried anything yet
JA: Anything else you want the mechanic to know before I connect you?
Customer: nope thats ity
Submitted: 29 days ago.Category: UK Car
Show More
Show Less
Ask Your Own UK Car Question
Answered in 1 hour by:
11/17/2017
UK Auto Mechanic: Matt, Mechanical Engineer replied 29 days ago
Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 22,256
Experience: BEng hons Mech engineering, in auto industry 22 years
Verified

Hello

these cars are very prone to issues with the ignition coil assembly as they age

I'd suggest to try testing the coil pack (also know as the DIC)

as shown on the image

if this is OK then this could be a wiring issue as things tend to expand when hot and its possible a poor or partial electrical connection is being pushed apart on one of the major sensors so check the connection plug and wiring to the following;

Airflow meter

Crank position sensor

Cam position sensor

O2 sensor

Throttle position sensor

unplug each in turn and use some switch / contact cleaner spray on the pins to ensure its all grease / dirt free

Also worth checking the connections to the fuel pump for the same reason - unplug each in turn and give them a good squirt of switch / contact cleaner - Not WD40

and also unplug and inspect the main power relays and fuses for signs of overheating or corroded terminals - so the ones for the ECU and the fuel pump

And also unplug the wiring loom connections in the engine bay one at time and inspect for corroded or recessed pins.

Also replace the spark plugs if any of them fail this checklist:

https://www.ngksparkplugs.com/about-ngk/faqs/spark-plug-faqs/how-do-i-read-a-spark-plug

Also its worth checking that the electric pump that feeds the injectors is working correctly, it should run for a few seconds then switch off when you first turn the ignition on. If the connections to this are corroded or damaged then the pump could stop at any time. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse, ideally measure the voltage at the pump and check its getting 12V

Ask Your Own UK Car Question
Ask Matt Your Own Question
Matt
Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 22,256
22,256 Satisfied Customers
Experience: BEng hons Mech engineering, in auto industry 22 years

Matt is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Marty

Marty

European Car Expert

413 satisfied customers

ASE & Bosch Certified Master Tech. Over 30 years experience.

Greg

Greg

Shop Owner

1,321 satisfied customers

17 years Shop Owner /Technician. 27 years experience,

Richard

Richard

UK Car Mechanic

614 satisfied customers

12 years as a technician at a Ford and Jaguar dealer Ford and Jaguar factory certified

Matt

Matt

Mechanical Engineer

22,256 satisfied customers

BEng hons Mech engineering, in auto industry 22 years

Trevor

Trevor

UK Car Mechanic

853 satisfied customers

NVQ 3, Modern Apprenticeship, MOT Tester, 15+ years experience diagnostic technician

Rob

Rob

UK Car Mechanic

823 satisfied customers

city and guilds level 1 2and 3. mot tester , 28 years experience set up training college in afghanistan

martin jones

martin jones

UK Car Mechanic

640 satisfied customers

25 years as a mechanic and mot tester, owned own business for 10 years city and guilds trained

< Previous | Next >

Related UK Car Questions
Engine started juddering and then lost power, car limped
Engine started juddering and then lost power, car limped home … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My right back door 's lock is not working. When i unlock the
Hi there. My right back door 's lock is not working. When i unlock the door the knob is not popping up. I cant get the door open at all. The technician said i need to basically destroy the door to get… read more
Martin
Martin
Vocational, Technical or Trade Scho
358 satisfied customers
My clutch pedal sometime sticks half way up but not always.
My clutch pedal sometime sticks half way up but not always … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I have a 1981 g20 van and the start motor has got no power
i have a 1981 g20 van and the start motor has got no power to it … read more
Marty
Marty
European Car Expert
Associate Degree
413 satisfied customers
Do you have to remove the harmonic balance are to change the
Do you have to remove the harmonic balance are to change the timing belt on a 3 L V6 and if so how do you remove harmonic balance are bolT … read more
Greg
Greg
Shop Owner
Vocational, Technical or Trade Scho
1,321 satisfied customers
MY PEUGEOT 3008, 2010 PLATE GOES INTO AUTO NEUTRAL AND WILL
MY PEUGEOT 3008, 2010 PLATE GOES INTO AUTO NEUTRAL AND WILL NOT ENGAGE GEARS. AFTER SWITCHING OFF AND ON AND IT FINALLY GETS INTO GEAR AND DRIVES. I HAVE SINCE PARKED IT … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My 1.6 zafira has suddenly started to loss power starts
my 1.6 zafira has suddenly started to loss power starts moving ok in 1st for a bit then when changing to 2nd and 3rdthere is a big drop in power to tge point where it has cutvout a few times while dri… read more
Matt
Matt
Mechanical Engineer
22,256 satisfied customers
Nissan terrano 2.7 td ,laisva eiga variklis dreba,netolygus
nissan terrano 2.7 td ,laisva eiga variklis dreba,netolygus kuro ipurskimas,kodel? gedimo kodas18. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Radio code required. Battery recently disconnected to charge
Battery recently disconnected to charge battery. Have checked all paperwork but no info. Purchased car recently. … read more
Gallagher99
Gallagher99
Ford Senior Technician
Vocational, Technical or Trade Scho
757 satisfied customers
Pearl! ( age 75) and I'm living in Rotterdam.I a drive an
Hello Mike & Pearl! My name is Arie( age 75) and I'm living in Rotterdam.I a drive an older Rover 45 1,8 CVT from 2004.My problem is that I switched the battery for a new one.. At the moment I connect… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
My horn sounds all the time, unless I take the relay away.
Hello, my horn sounds all the time, unless I take the relay away. Sorento 2007 … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
279 satisfied customers
1992 4 door Honda Accord Chassis No. JHMCB36400C224280. The
1992 4 door Honda Accord Chassis No. JHMCB36400C224280 … read more
Cesar Jimenez
Cesar Jimenez
Owner
Vocational, Technical or Trade School
48 satisfied customers
My Jeep Cherokee does not start from the ignition key. Have
My Jeep Cherokee does not start from the ignition key. Have installed a bypass switch to the starter relay with which I start the vehicle. It is a 2.8 diesel. Where can I start looking. There is no vo… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Won't start charged battery everything else works but will
Won't start charged battery everything else works but will not turn over. Is there a park switch somewhere that could stop it from starting … read more
Mechanic01
Mechanic01
1,335 satisfied customers
Abs, brake failure, parking assist, immobiliser lights have
Abs , brake failure, parking assist, immobiliser lights have come on.. … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,135 satisfied customers
When I press my clutch pedal it just drops to the floor and
when I press my clutch pedal it just drops to the floor and then doesn't come back up … read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Vauxhall zafira 1.9cdti (z19dth) 150bhp. When stationary if
Vauxhall zafira B 1.9cdti (z19dth) 150bhp. When stationary if you put accelerator to the floor the revs bounce between 1650 and 1850 rpm and will not rev past. When driving, having 2 change gear at 15… read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
52 satisfied customers
We are actually restoring a Toyota Prius after the circuit
Hey, we are actually restoring a Toyota Prius after the circuit was grilled by a reverse polarity jumpstart. Now I wanted to know if there is a centralized reverse polarity protection for the whole ca… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x