How JustAnswer Works:

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

Ask Zaphod Your Own Question

Zaphod
Zaphod, Diagnostician, Trainer
Category: Car
Satisfied Customers: 33
Experience:  14+ years on an automotive technical hot line; Top Gun Diagnostician award
6510440
Type Your Car Question Here...
Zaphod is online now
A new question is answered every 9 seconds

2000 ford mustang: no power compression good..cylinders timing chain

Resolved Question:

2000 ford mustang no power compression good 170lbs all the cylinders timing chain good
Submitted: 2 years ago.
Category: Car
Expert:  Zaphod replied 2 years ago.

Zaphod :

Hi, Jeff here; Sorry to hear your vehicle is ill. Is the CHECK ENGINE light on when it's running?

Zaphod :

Well, if you still need help let us know.

Expert:  Zaphod replied 2 years ago.
What Happens Now?

Your chat has ended, but you can still work with your Expert to get an answer to your question if you have not yet received one.

Come back to this page at any time to see additional information from your Expert.  You will also receive an email when your question is updated.  If you want to send a message to your Expert, use the box below.

If you have already received a satisfactory answer to your question, click the Accept button above.  Experts are credited for each accepted answer they provide.
Expert:  Zaphod replied 2 years ago.
Sorry I missed you in chat, sometimes the system indicates a customer is online when they're not. Anyway, I have a few questions to get us started. Did this loss of power come on suddenly or has it been gradually getting worse? What were the O2 sensor codes you found? Have you tried disconnecting anything else? Do you have a scanner to check some sensor data? There are some common issues with some Ford parts on various vehicles that have driven techs crazy. I await your reply, Jeff
Customer: replied 2 years ago.
Check engine light on when running I'll let u know the codes once I put timing cover back together note in park the engine seams to run fine it will rev up to 4 or 5 thousand rpm put In drive no power what do u think
Expert:  Zaphod replied 2 years ago.
Different engines have different issues: I presume your engine is Ford's 3.8 liter v-6? You can check stored codes with the ignition on, the engine does not have to be running. When revving in park there is no real work being done, in drive the system uses a lot more fuel and various pollution control systems start working. Fords have known issues with EGR passages getting plugged up and MAF [Mass Airflow Sensor] sensors that drift out of calibration or get a little dirty. At this point I'd want to: XXXXX XXXXX codes, check the PCM's calculated altitude using the barometric pressure parameter [a quick MAF checkup], perhaps do a simple MAF test, check for EGR issues, and verify fuel pressure. I'd bet on clogged EGR passages or a dirty MAF. The MAF issue: When the MAF gets dirty it lies to the PCM about the amount of air the engine is ingesting-in Fords it virtually always reports less air than there really is. Based on this lower air volume reading, the PCM gives the engine less fuel-this causes the O2 sensors to report the lean condition and the PCM tries to correct it by adding more fuel. If the amount of fuel added exceeds a certain percentage, a code is tripped for a lean exhaust-most often for both sides of the engine but sometimes one side sets the code first. Data would show if the other side is close to setting a code. With no other malfunctions detected and no other way to measure barometric pressure, the PCM ASSumes the lower air volume is due to an increase in altitude, where there's less air, and it recalculates the barometric pressure parameter [line of data on a scan tool]. Presuming you're at sea level, this parameter should be 99-104kPa [kilopascals] which is the same as 30 inches of mercury [different techs prefer different scales]. If it's lower than 80kPa/25"Hg then this is the problem. The EGR issue: Ford runs exhaust gas back into the intake using an series of internal passages in the intake manifold. After passing through the EGR valve, the exhaust gases are routed through individual passages that end in tiny holes which allow the exhaust gas into the main air passages. As these tiny holes become plugged, the remaining cylinders get more and more exhaust gas. EGR is inoperative at idle and in park or neutral, and if you stuff enough exhaust back into the engine it will misfire [due to the lack of oxygen needed to burn the fuel]. Two quick tests you can do: disconnect the MAF electrical connector, check power in drive-if it's better then the MAF is most likely the bad guy>time for a scanner to help verify this. Disconnect the EGR valve, check power in drive-if it's better then clogged EGR ports are the most likely cause. You may even see improvement in both cases. LEt me know how it goes, Jeff
Customer: replied 2 years ago.

i figured out the problem catiliac converter cloughed on one side how are u on dodge 2003 hemi runs really rough i belive broke vale springs on #1 cylinder #1 plug carbon fouled

 

Expert:  Zaphod replied 2 years ago.
A compression test will tell you if there's a mechanical issue. Is it using oil? and is the carbon fluffy black or hard crusty black? I presume there's a check engine light on and a misfire code for #1?
jeff
Customer: replied 2 years ago.
p0132 will not idel changed throtel body and oxygen senors
Expert:  Zaphod replied 2 years ago.
You will have to open another question since this involves another vehicle. Jeff
Expert:  Zaphod replied 2 years ago.
The P0132 indicates a dead O2 sensor OR an open circuit between the PCM and the sensor. Chrysler JTEC computers [Jeep Truck Engine Controller] apply 5 volts on the sensor signal circuit when it's not responding to a lean fuel delivery command-lean conditions normally cause the sensor to produce a voltage under 0.5v. The code set conditions follow:
The Oxygen Sensor voltage is above 3.99v for 30 seconds. One trip fault. Three good trips to turn off the MIL.

If you have nasty mechanical issues with #1 cylinder it can foul the sensor with oil and you'd get this code. I'd go after compression and pull a valve cover. If the spring is broken, the valve might end up finding a new home in the oil pan as it passes through the piston. This is what happened on the drag race car at the school where I taught Automotive Technology; the valve couldn't close when the piston came back up. This catastrophic failure almost completely ruined the engine: the piston cracked as the rod tried to push it up, and the resulting force cracked the block, perforated the piston and other parts of the valve perforated the head. If there's a lot of noise under the valve cover, it should come off as soon as possible.
Jeff
Zaphod, Diagnostician, Trainer
Category: Car
Satisfied Customers: 33
Experience: 14+ years on an automotive technical hot line; Top Gun Diagnostician award
Zaphod and 6 other Car Specialists are ready to help you

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 P Elm City, NC
< Last | Next >
  • 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 P Elm 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. Phil Marysville, 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. Charles Walnut 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!
    Sue Charleston, 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. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician