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 john -aka eauto Your Own Question

john -aka eauto
john -aka eauto, The Car Guy
Category: Saturn
Satisfied Customers: 12949
Experience:  ase tech 15 + years foreign domestic & european
Type Your Saturn Question Here...
john -aka eauto is online now
A new question is answered every 9 seconds

97 saturn: 5spd..misfire on cylinder 4..higher rpm

Customer Question

I have a 97 saturn sl1 5spd. I have had a misfire on cylinder 4 twice when I take the care to a higher rpm (3500-4000). I cleared the codes both times. I then had a chance to drive my friends 99 sl1 5spd and i notice his car has noticeably more power then mine. I baby the car never rev the motor over 2300 rpm and drive at 65mph and only get 32mpg. the list of what I have done/ checked are
compression test 150 low 160 high
new fuel pressure regulator
new plugs wires
change to a known good coil pack
what could be the problem?
Submitted: 3 years ago.
Category: Saturn
Expert:  john -aka eauto replied 3 years ago.
Hi . Thank you for asking your question on JustAnswer. i would say the injector likley has a issue...I would start by changing the injector...


Thank you again for trusting us with your problem. John aka eauto
Customer: replied 3 years ago.
the injectors are from what I can tell working fine. none stuck open or one spraying more then the other.
Expert:  john -aka eauto replied 3 years ago.
so the only code your getting is po 304?
Customer: replied 3 years ago.
I got a p0304 the first time i got on the gas since I bought the car after reving it to 4500 and it seemed slugish. it gave the p0304 then I did the plugs wires and coil and then got on it again and same isue but with a p0301
Expert:  john -aka eauto replied 3 years ago.
have you checked fuel pressure?
Customer: replied 3 years ago.
yes it was 34 psi and autozone said that it should be 38-44 so I also replaced the regulator I didnt recheck the pressure but i figured with a new one in it should be good, right?
Expert:  john -aka eauto replied 3 years ago.
no..its likley a failing fuel pump..or clogged fuel filter...check pressure again... sounds like its a fuel issue....the injectors need a minimum of 40 psi
Customer: replied 3 years ago.
sounds corect but I am also not getting nearly the fuel econmy that my friend gets with his and he drives it faily hard and I baby mine like no other I am alwas getting the bird when pulling away from a stop ligh or on the freeway. I get 32-33 and he gets 40-42. are these issues related if yes how so?
Expert:  john -aka eauto replied 3 years ago.
if the injectors have a lazy spray...do to weak fuel pressure and missfires..its going to greatly effect fuel efficency.....verify fuel pressure and get that corrected...i would be willing to bet fuel economy will improve and the miss fires will go away
Customer: replied 3 years ago.
Is the Saturn supposed to hold fuel pressure after pump turns off I noticed that as soon as the pump turned off the fuel pressure dropped immediately?
Expert:  john -aka eauto replied 3 years ago.
yes it is suppoose to...sounds like a fuel pump.....i bet it has a hard start after sitting
Customer: replied 3 years ago.
it takes 4 seconds of cranking to get it to start or two quick hits of like a second or so
Expert:  john -aka eauto replied 3 years ago.
replace the pump and filter
Customer: replied 3 years ago.
k thanks!
Expert:  john -aka eauto replied 3 years ago.
great any further questions feel free to ask..if the answer was useful please hit accept so i get credit for my work and time.

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
< Last | Next >
  • 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!!!! Alex Los 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. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, 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. Esther Woodstock, 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. Robin Elkton, 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. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • 15yearsaturnguy

    Saturn master tech

    Satisfied Customers:

    1671
    25 years automotive experience, 15 years with Saturn
< Last | Next >
  • http://ww2.justanswer.com/uploads/BA/bassplayer360/2011-7-23_14023_mikeheadshot.64x64.jpg 15yearsaturnguy's Avatar

    15yearsaturnguy

    Saturn master tech

    Satisfied Customers:

    1671
    25 years automotive experience, 15 years with Saturn
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    650
    ASE Master Tech 15+ Years
  • http://ww2.justanswer.com/uploads/PE/peterpete190/2012-2-24_1274_20120215135406.64x64.jpg Pete's Avatar

    Pete

    Saturn Mechanic

    Satisfied Customers:

    531
    15 years Saturn Technician experience.
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Saturn Tech -

    Satisfied Customers:

    391
    18+yrs experience. State Inspector and Saturn Diagnostics
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    ASE Certified Technician

    Satisfied Customers:

    375
    Master ASE technician,Master GM technician,40 years experience
  • http://ww2.justanswer.com/uploads/Rocket2005/2009-09-13_133703_jack.jpg cartech's Avatar

    cartech

    ASE Certified Technician

    Satisfied Customers:

    305
    25 year master tech and shop owner
  • http://ww2.justanswer.com/uploads/MO/molurch/2012-6-6_214526_500.64x64.png Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Saturn Mechanic

    Satisfied Customers:

    270
    GM, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.