Car

Ask a Mechanic Online and Get Answers to Your Car Questions

Ask an Expert,
Get an Answer ASAP!

Car

2002 pontiac: 3.8..goes dead..already replaced..crank shaft..coolent

Customer Question
my 2002 pontiac grad prix...
my 2002 pontiac grad prix gt 3.8 sometimes goes dead when hot after siting for 45 minutes will crank up already replaced crank shaft senser. gives code po128 which is coolent temp to low.whats causing it to go dead
Submitted: 9 years ago.Category: Car
Show More
Show Less
Ask Your Own Car Question
Answered in 4 minutes by:
3/1/2008
Auto Mechanic: MikeB85, ASE Certified Technician replied 9 years ago
MikeB85
MikeB85, ASE Certified Technician
Category: Car
Satisfied Customers: 354
Experience: ASE Certified, I-Car Trained and Certified, Automotive Technology Degree
Verified

When you mean dead, do you mean the car does not crank at all or does the vehicle crank and crank but just won't start? And this is the only code that has come up?

Let me know and I will see if we can get you fixed up. Thanks.

Ask Your Own Car Question
Customer reply replied 9 years ago
Reply to MikeB85's Post: it cranks but just want start for about 45 minutes, only does it about once a week, i changed fuel filter yesterday, begining to think its fuel related, havent checked fuel pressure yet.always happens at a place thats to noisy to hear fuel pump. when you crank the car it some tmes acts like it wants to start. most of the time its when you kill the car, go into a store and come back the car starts then it kind of sputters and dies like its not geting any gas or maybe flooding, ive pulled vacume line from fuel regulator, seems to be fine no gas smell. and as ive already said ive replaced fuel filter,crankshaft sensor, ignition moduel, thermostat, temp sending switch the one with three wires since it was giving trouble code po128.
Auto Mechanic: MikeB85, ASE Certified Technician replied 9 years ago

If you already replaced the ECT and the code is still coming up then there might be a possibility of a short in the circuit for the sensor. One thing that you can do if you have access to a scan tool is compare the ECT with intake air temperature. On a completely cool engine with a scan tool, the ECT should be within 3°C (5°F) of the IAT. If it isn't and the P0128 code is coming up then I would lean towards a short or an open in the ECT circuit. Like you mentioned above, I would also get that fuel pressure checked when the problem occurs and see what's going on there. Most likely since this seems intermittent, I would lean more towards something with the ECT circuit if that is the only code that is coming up. This could also be caused by a poor connection due to a connector being bad or this could be a bad connection at the PCM. I hope this helps. Please let me know if you have any other questions.

MikeB85
MikeB85, ASE Certified Technician
Category: Car
Satisfied Customers: 354
Experience: ASE Certified, I-Car Trained and Certified, Automotive Technology Degree
Verified
MikeB85 and 87 other Car Specialists are ready to help you
Ask your own question now
Customer reply replied 9 years ago
Reply to MikeB85's Post: i havent received the code po128 since i replaced the temp switch over a week ago, how ever it has went dead on me . i finally got it to die on me at home, i turned key to listen to fuel pump didnt hear anything, turned key again and heard pump it sounded bit slugest, done it a third time and on the fourth time i tried to crank the car and it started up, hasnt went dead since i replaced fuel filter, but that was only 2 days ago. i can get it checked at chey place for 75 dollars but im afraid that would be a waste of more money unless it would die on me there
Auto Mechanic: MikeB85, ASE Certified Technician replied 9 years ago
Something you can try yourself is checking for power at the pump when the problem occurs. If there is power to the harness at the pump then I would suspect a bad fuel pump. If there isn't then there could be an issue in the harness itself or wiring or possibly the fuel pump relay. Another thing you can try is switching the fuel pump relay with a known good relay to see if it does the trick. This however, is only if you don't have power to the fuel pump connector when the problem occurs. The fuel pump relay should be in the underhood fuse block. There should be a relay/fuse legend underneath the cover telling you which one it is. I hope this helps. Let me know if you have any other questions. Thanks.
Ask Your Own Car Question
Customer reply replied 9 years ago
went back dead today at home, fuel pump did not run but you could hear like a bump and click from fuel pump so sounds like its getting power at fuel pump, but fuel pump starts running after 45 minutes and car starts, is this a bad fuel pump is it geting hot and shuting off until it cools, would like your advice again before i spend 3 hundred on a fuel pump plus putting it in, again it only goes dead on me when i drive it a while shut it off and when its restarted it goes back dead
Ask MikeB85 Your Own Question
MikeB85
MikeB85
MikeB85, ASE Certified Technician
Category: Car
Satisfied Customers: 354
354 Satisfied Customers
Experience: ASE Certified, I-Car Trained and Certified, Automotive Technology Degree

MikeB85 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:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time!

Paul MCorpus Christi, TX

< Previous | Next >

Meet the Experts:

Chris (aka-Moose)

Chris (aka-Moose)

Technician

1,243 satisfied customers

16 years of experience

Ted G.

Ted G.

ASE Certified Technician

1,724 satisfied customers

20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness

George H.

George H.

ASE Certified Technician

1,537 satisfied customers

ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist

GM Tech (Cam)

GM Tech (Cam)

Auto Service Tech

669 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Amedee

Amedee

Former ASE Master Tech

2,520 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Jerry

Jerry

Master Mechanic

2,181 satisfied customers

ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager

Richard

Richard

ASE Certified Technician

1,000 satisfied customers

12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes

< Previous | Next >

Related Car Questions
Glitter in the upper fuel filter. runs well but worried.
glitter in the upper fuel filter. runs well but worried … read more
Steve
Steve
Master\u0027s Degree
954 satisfied customers
My husband's key fob is not working. He knows how to get the
My husband's key fob is not working. He knows how to get the physical key out of the fob, but we don't know where put it in order to unlock and then start the car since it's all keyless entry. It's a … read more
jim
jim
Vocational, Technical or Trade Scho
1,317 satisfied customers
I have a 2010 buick lacrosse with 2.4 4 cylinder engine i
i have a 2010 buick lacrosse with 2.4 4 cylinder engine i keep getting a reduced engine power message. if i turn the car off and wait for a couple of minutes it goes away for about 10 minutes then com… read more
vwtech0405
vwtech0405
VW Technician
Associate Degree
9,666 satisfied customers
A light tapping sound when in park goes away when in gear. A
a light tapping sound when in park goes away when in gear … read more
Steve
Steve
Master\u0027s Degree
954 satisfied customers
I am looking for car deals with average paying 150-200 /
Second opinion] I am looking for car deals with average paying 150-200 / month ? Is there ay. Current deal around me here in NY… read more
Ted G.
Ted G.
ASE Certified Technician
Vocational, Technical or Trade Scho
1,724 satisfied customers
My 210 Suzuki Kizashi sometime will not start. Car display
My 210 Suzuki Kizashi sometime will not start. Car display says turn steering wheel in both directions to unlock. Can I get this function disabled rather then repairing, I hear it is a bit costly! … read more
Eric
Eric
Retired
N/A
31,322 satisfied customers
2012 Traverse transmission feels like it is slipping but
2012 Traverse transmission feels like it is slipping but it's not, there is a hesitation between gears, going up or down. Not all the time, but mostly if there is a load on it. Was told it could be a … read more
Eric
Eric
Retired
N/A
31,322 satisfied customers
My camry 96 year model cuts out when coming to slowing down
My camry 96 year model cuts out when coming to slowing down to stop, please help. Vince … read more
roy
roy
Associate Degree
3 satisfied customers
Looking at buying a 2007 pacifica with the 4.0L seller says
looking at buying a 2007 pacifica with the 4.0L seller says it has a misfire … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,396 satisfied customers
The LED touchscreen went off four days ago. I have tried
The LED touchscreen went off four days ago. I have tried everything to bring up the touch screen. No luck. Also, the radio is not working. … read more
Wolfgang
Wolfgang
Master Audi/VW/Bentley Tech
Associate Degree
4,657 satisfied customers
My radio (CUE) volume seems to be not working properly. It
My radio (CUE) volume seems to be not working properly … read more
Steve
Steve
Master\u0027s Degree
954 satisfied customers
I'm wondering if Exxon Synergy gas will hurt or harm my 2008
I'm wondering if Exxon Synergy gas will hurt or harm my 2008 Prius. … read more
K. Wiggins
K. Wiggins
ASE Certified Technician
Associate Degree
3,000 satisfied customers
I need to know the type of transmission is in a 2006 Dodge
I need to know the type of transmission is in a 2006 Dodge Caravan (3.3L) and also how many speeds there are: VIN # 1D4GP25R36B646548. Thank you.… read more
Edward
Edward
Professional at Justanswer.com
Associate Degree
3,175 satisfied customers
I have a 1995 C280 and there is no braking on the passenger
I have a 1995 C280 and there is no braking on the passenger side front wheel. … read more
Expert
Expert
15 satisfied customers
My truck is sputtering but only when I'm under load like
My truck is sputtering but only when I'm under load like during acceleration, I am throwing no codes so I'm not sure how to proceed … read more
vwtech0405
vwtech0405
VW Technician
Associate Degree
9,666 satisfied customers
My cadillac is a 2008 cts 3.6. It is cranking but not
My cadillac is a 2008 cts 3.6. It is cranking but not starting … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,396 satisfied customers
1999 isuzu trooper 3.5 v6 crank no spark, i have battery
1999 isuzu trooper 3.5 v6 crank no spark, i have battery voltage, a trigger signal( a little dim), and ground is showing just over 200mv. Tested with key on whith a know good coil, im stumped. … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
85 satisfied customers
Catalytic converters are stopped up and glowing red hot on
catalytic converters are stopped up and glowing red hot on my 1997 LS 400 how many are there ? … read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 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