Car

Ask a Mechanic Online and Get Answers to Your Car Questions

Ask an Expert,
Get an Answer ASAP!

Car

2005 suzuki verona with p300, p0301, p0302, p0303, p2096, It

Customer Question
doen't want to go. I...
2005 suzuki verona with p300, p0301, p0302, p0303, p2096, It doen't want to go. I change new spark
Submitted: 2 years ago.Category: Car
Show More
Show Less
Ask Your Own Car Question
Answered in 2 hours by:
11/19/2015
Auto Mechanic: Juan Crespo, Tech Trainer replied 2 years ago
Juan Crespo
Juan Crespo, Tech Trainer
Category: Car
Satisfied Customers: 1,526
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

Hi there. Thanks for using our service!

Based on those codes and the lack of power you mention, the problem is probably fuel-related. To confirm, measure fuel pressure. It should be about 45 psi. If less, replace fuel pump and filter.

You might also have to replace the fuel pressure regulator if, in addition to the lack of power, the engine cranks longer than normal before starting.

Best Regards.

Ask Your Own Car Question
Customer reply replied 2 years ago
Check fuel pressure is ok, change new fuel filter, same problems.
Engine start ok, idle is ok, only problem is not speed more than 30 mph,
Check engine light flashing, code p300, p301, p302, p303, and p2096
Customer reply replied 2 years ago
Problem is not solved, please let me know what else can be?
Auto Mechanic: Juan Crespo, Tech Trainer replied 2 years ago

It is very important to check fuel pressure with a pressure tester to confirm it is around 45 psi. If that is so, then we need to check engine vacuum to rule out the possibility of a partially clogged exhaust system. Here is what a vacuum test tells us:

Normal Engine Operation

At idling speed, an engine at sea level should show a steady vacuum reading between 14 in. and 22 in. Hg. A quick opening and closing of the throttle should cause the vacuum to drop below 5 in., then rebound to 23 in. or more.

General Ignition Trouble or Sticking Valves

With the engine at idle, the continued fluctuation of 1 to 2 inches may indicate an ignition problem. You should check things like spark-plug gap, primary ignition circuit, high-tension cables, distributor cap or ignition coil. Fluctuations of 3 to 4 inches may point to sticking valves.

Intake System Leakage, Valve Timing or Low Compression

A vacuum reading at idle that is much lower than normal might indicate leakage through the intake manifold gaskets, manifold to carburetor gaskets, vacuum brake booster or the vacuum modulator. Low readings could also be caused by very late valve timing or worn piston rings.

Exhaust Back Pressure

Starting with the engine at idle, slowly increase engine speed to 3,000 rpm. Engine vacuum should be equal to or higher than vacuum at curb idle. If vacuum decreases at higher rpm, an excessive amount of back pressure is probably present due to a restriction in the exhaust system.

Cylinder Head Gasket Leakage

With the engine at idle, the vacuum gauge pointer will drop sharply every time the leak occurs. The drop will be from the steady reading shown by the pointer to a reading of 10 in. to 12 in. Hg. or less. If the leak is between two cylinders, the drop will be much greater. You can determine the location of the leak by doing a compression test.

Remember, engine problems can affect transmission performance. If you suspect an engine problem, connect a vacuum gauge to the intake manifold. Note the location and action of the vacuum gauge needle, and use that information to determine the engine problem. Correct the engine problem before doing extensive calibration work on the transmission.

Please perform the vacuum tests described above; then share the various readings with me along with the actual fuel pressure in psi so I can get a better idea of what is exactly happening with your engine.

Best Regards.

Ask Your Own Car Question
Customer reply replied 2 years ago
this is straight 6 engine, but it only misfire first 3 cylinder, I checked fuel pressure is 44psi, check engine pressure 130psi for each cylinder, check vaccuum OK, no vacuum leak. I try to delete code, and test drive, it go ok for the first 3 minutes, after that it lost power
I don't know what going on, try everything you said, still the same
Auto Mechanic: Juan Crespo, Tech Trainer replied 2 years ago

OK. The best way to diagnose this issue would be with a scan tool capable of reading engine data. That way we could see what's happening to the power feed for coils 1, 2 and 3.

Without the scan tool, we could inspect harness connector C118 (see attached graphic) to see if there is where the power loss is occurring. Other than that, it would be a matter of checking each individual coil and injector circuit on those three cylinders to determine where the problem is (see attached diagram).

Please let me know what you find.

Best Regards.

Ask Your Own Car Question
Customer reply replied 2 years ago
Can you Give me A diagram showing where To hook up to test exhaust back pressure
Auto Mechanic: Juan Crespo, Tech Trainer replied 2 years ago

The easiest point where you could install a vacuum gauge is on the big vacuum hose going to the brake booster; just use an adapter. As an alternative, you could use a "tee" fitting on the vacuum hose going to the fuel pressure regulator. Basically, anywhere where there is manifold vacuum at idle is good.

Best Regards.

Ask Your Own Car Question
Customer reply replied 2 years ago
My car is still same problem, I did everything you tell me, I check everything is ok, but my car was not speed over 20 mph.
Auto Mechanic: Juan Crespo, Tech Trainer replied 2 years ago

I'm sorry, but I'm a little confused by your reply. Please keep in mind that while I can provide you with technical guidance, working on this type of issue will require you to have not only access to several different automotive tools, but the skills to use them as well. As I’m unable to hear, see or touch your vehicle, it is very important that you provide as much information as possible.

What exactly do you mean when you state "I did everything you tell me, I check everything is ok"? Did you confirm all three injectors and coils were firing?

Ask Your Own Car Question
Customer reply replied 1 year ago
I swap coil 1,2,3 to 4,5,6 and injector 1,2,3 to 4,5,6 still got code p0300, p0301, p0302, p303
And p2096. Changed new fuel filter, check fuel pressure is 44 psi. Car started ok (turn on right away) , idle is ok. Engine light wasn't on when car in idle, when drove car 3 minutes check engine light start flashing and it lost power
Auto Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

I'm sorry if you misunderstood my instructions, I did not tell you to swap coils or injectors. What I did tell you to do was

"The best way to diagnose this issue would be with a scan tool capable of reading engine data. That way we could see what's happening to the power feed for coils 1, 2 and 3.

Without the scan tool, we could inspect harness connector C118 (see attached graphic) to see if there is where the power loss is occurring. Other than that, it would be a matter of checking each individual coil and injector circuit on those three cylinders to determine where the problem is (see attached diagram)."

Did you check vacuum as I previoulsy indicated? If so, what were the results? How about checking connector C118? Did you check the individual circuits and connectors for cylinders 1, 2 and 3?

As a technical expert all I can do is recommend the procedures you need to perform to diagnose the issue with your vehicle. It is ultimately up to you to have the necessary skills and tools to execute those procedures.

Best Regards.

Ask Your Own Car Question
Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo
Juan Crespo, Tech Trainer
Category: Car
Satisfied Customers: 1,526
1,526 Satisfied Customers
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European

Juan Crespo 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

1,212 satisfied customers

16 years of experience

Ted G.

Ted G.

ASE Certified Technician

1,708 satisfied customers

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

George H.

George H.

ASE Certified Technician

1,522 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

2,505 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
Sometimes the turn signals blink very fast, almost staccto
sometimes the turn signals blink very fast, almost staccto and then go back to normal blink. sometimes the right front blinks rapidly and is hard to see and the back turn signal not works at all. what… read more
Michael Solis
Michael Solis
259 satisfied customers
My 2004 BMW 745i is causing me problems and I can't figure
My 2004 BMW 745i is causing me problems and I can't figure out why {guess I lost any knack I had for mechanics when they started putting computers in them), twice in the last week it has been running … read more
camerontech
camerontech
20 year experience diagnostic technician
class a
549 satisfied customers
2001 BMW 740i. I'm new to BMW's, I just replaced the heat
2001 BMW 740i. I'm new to BMW's, I just replaced the heat control valve it was clogged up bad. When running the best in the car the defrost and floor vents blow really hot air when temp set at 90 like… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
Where can I get a repair manual for my 2003 Mercury Grand
Where can I get a repair manual for my 2003 Mercury Grand Marquis radio? … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,938 satisfied customers
Need to change CJB for my LR4. Does purchasing used CJB with
Hi need to change CJB for my LR4. Does purchasing used CJB with the same part number work and how to transfer the software from mine to the used one? … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
How are you ready for thanksgiving I 'm cooking a tricky and
Michael how are you ready for thanksgiving I I'm I'm cooking a tricky and ham I'm set punch ppl over hope ur ready Question on this 3500 HD 2008 is the glow plug module plug and play or dose it have t… read more
Michael Solis
Michael Solis
259 satisfied customers
I have a 2001 Dodge 2500 can I install a OnStar rear view
I have a 2001 Dodge 2500 can I install a OnStar rear view mirror in it ? … read more
Expert
Expert
13 satisfied customers
1998 Toyota 4 runner .. headlights come on even when parked,
1998 Toyota 4 runner .. headlights come on even when parked, engine off ... turning the switch by the steering wheel on and off a few times gets them to go off .. but they may come back on any time. … read more
Curtis
Curtis
Vocational, Technical or Trade Scho
1,673 satisfied customers
2014 Acadia, 56000 miles. Recently starts are a little
2014 Acadia, 56000 miles. Recently starts are a little rough. Doesn't crank right up. Definitely not the battery.… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Changed the cam position senser bank 1 and the VVT solenoid
changed the cam position senser bank 1 and the VVT solenoid hucked … read more
Michael Solis
Michael Solis
259 satisfied customers
2012 Jeep Liberty center tail light not working. Checked
2012 Jeep Liberty center tail light not working. Checked fuses - all look ok, moved a couple around, light still not working. Bought new light assembly from Jeep - no lights. Checked with volt meter -… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,938 satisfied customers
I have a '96 VW Eurovan ( pop-up camper) Which had its
I have a '96 VW Eurovan ( pop-up camper) Which had its automatic transmission rebuilt in the spring. During a trip this fall, The transmission malfunctioned and so was returned for warrantee repairs. … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
181 satisfied customers
Goes to netural after 20mph. 2003 Mazda 3. And I tried
Yes and I tried replacing all the solenoids still get the same issue … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
What should be the acceptable draw on the battery in a 2005
What should be the acceptable draw on the battery in a 2005 Corvette Z06 when engine is not running. Is the best way to test connecting a multi meter between the negative battery terminal and battery … read more
nelson freitas
nelson freitas
Automotive Technician
Vocational, Technical or Trade School
83 satisfied customers
Do you know of an electric cutout system that will work on a
Do you know of an electric cutout system that will work on a 2007 CLK63 AMG? … read more
kwiggins29059
kwiggins29059
Associate Degree
219 satisfied customers
I have a 2003 Saab Turbo and my grand father grabbed the
I have a 2003 Saab Turbo and my grand father grabbed the wrong container oilmintead of pink coolant . He put like three capfuls in before he realized it. Well he just told me it's been running fine bu… read more
eurotec
eurotec
Vice President / Manager
Associate Degree
11 satisfied customers
My mini is throwing code p0012 and the oil light comes on
my mini is throwing code p0012 and the oil light comes on and goes off … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,938 satisfied customers
V.w.2003 passet 6 cil. when car is cold i can disconnect
v.w.2003 passet 6 cil. when car is cold i can disconnect positive cable when car warms up battery light comes on and car no longer charges … read more
vwtech0405
vwtech0405
VW Technician
Associate Degree
8,868 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