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 Toyotapro Your Own Question

Toyotapro
Toyotapro, ASE master tech
Category: Toyota
Satisfied Customers: 9973
Experience:  ASE Certified, 10+ years Lexus and Toyota Certified
9414525
Type Your Toyota Question Here...
Toyotapro is online now
A new question is answered every 9 seconds

1994 Toyota Celica ST: 000 miles..wouldnt start..towed..spark plugs

Resolved Question:

My 1994 Toyota Celica ST (268,000 miles) keeps skipping while I am driving and idling rough. This didn't start happening until it wouldn't start one day (at this point it was not skipping). I had it towed to a repair shop and they said that oil was seeping past the valve cover gasket and was causing the spark plugs to not fire correctly. The shop replaced the valve cover gasket, spark plugs, O ring and tubes. The car drove fine for a couple of days, then started skipping and idling rough. I changed the distributor cap, rotor button, and ran a bottle of fuel injector cleaner through the car. The car drove fine for a couple of days again, but started to skip and idle rough again, so I changed the fuel filter. The car drove fine for a couple of days and then I filled up with gas and it immediately started skipping and idling rough again. This time I took it to a shop and the mechanics checked the fuel injectors, vacuum hoses, and the fuel pressure (they were all working fine). They found that the original shop put in the wrong spark plugs, so they changed those plugs and put on new plug cables. The car had been driving great, but I filled up with gas again today and on the way home the car started skipping again. The last 2 times it seems to happen after I fill all the way up with gas. Any thoughts on what the problem could be?
Submitted: 4 years ago.
Category: Toyota
Expert:  Toyotapro replied 4 years ago.

Thank you for using just answer.

Being that this problem comes and goes and based on the inputs you have provided here I am thinking fuel contamination, we have seen a lot of issues in certain area's of the country lately where the ethanol was mixed too heavy or water contamination in the tanks that causes issues like yours. This can be frustrating because it can be difficult to figure out for some mechanics and is commonly overlooked. Ultimate the solution here if that be the case would be fuel tank removal, draining, cleaning.

Toyotapro, ASE master tech
Category: Toyota
Satisfied Customers: 9973
Experience: ASE Certified, 10+ years Lexus and Toyota Certified
Toyotapro and 5 other Toyota Specialists are ready to help you
Customer: replied 4 years ago.
I filled up at 2 different gas stations (probably 60 miles away from each other). It is likely that the problem could be common enough to effect both stations? Would the problem be resolved if I was able to get through this tank of gas without removing the tank, or would residue remain in the tank?
Expert:  Toyotapro replied 4 years ago.
Water for example (if that is the type of contamonation here) will not easily pass through the pick up screen in the tank, so the contamination stays mostly in the fuel tank, refuel this car 100 times at 100 different stations and it will still be there, aditives also will not resolve this. The only time I see "residue" in a tank as you mentioned is when oil is contaminating fuel. The best way to clean this out is as I stated with tank removal, it is near impossible to clean it effectively otherwise.
Customer: replied 4 years ago.
I guess what I'm confused about is why it doesn't happen until I fill up completely. If the tank of gas was bad and had water in it, wouldn't the problem continue until that tank of gas was depleted? For example, last time I filled up the car, it started skipping and idling rough almost immediately. But it ran fine on that same tank of gas after the new spark plugs and wires were put in.
Expert:  Toyotapro replied 4 years ago.
The fact that refueling causes this and the fuel pressure is good is what tells me to go after fuel quality/contamination, I am not saying that this is water, I am saying that this is contamination, it could be water, diesel, e85, mud, anything really can be contaminated in the fuel tank. Certain chemicals and contaminants float while others sink when gas is mixed, it sounds like what ever is causing this is mixing when the fuel tank is toward full level, I would have the fuel pump removed and the pick up screen and the tank closely inspected.
Customer: replied 4 years ago.
How rough is this on my car while I drive it? I typically drive about 120 miles a day. Is it something that should be looked at ASAP, or (as long as the car keeps driving), can it wait until the weekend?
Expert:  Toyotapro replied 4 years ago.

On a 1994 model the main concern is running the engine too lean and altering combustion chamber temperatures, 268,000 miles on this engine is quite a feat so this engine is already pretty worn, as long as the check engine light is not coming on and flashing then there is no major damage being done.

Another thought that came to mind for me earlier stood out as a timing alteration but your fuel statements tell me to have you check the tank first. If you need to wait until the weekend then just be sure to monitor the condition carefully, if this only happens full then consider only filling the tank half way this week.

Customer: replied 4 years ago.
Peter, you've given me some great info and I really appreciate your time. How extensive of a process is it for a mechanic to take out the fuel tank, drain it, clean it, and check the pick up screen? Not sure if your able to provide this info, but do you know approx how much a repair like this might cost?
Expert:  Toyotapro replied 4 years ago.
A typical charge for this would be 3 hours times the shops rate. Most times parts are not needed for this issue but if so that would depend on what is needed. I deal with fuel contamination on a regular basis at work and usually there are no long term issues or repeat issues as long as this is properly addressed the first 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:

 
 
 
  • THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU! Jughead USA
< Last | Next >
  • THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU! Jughead USA
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Auto Technician

    Satisfied Customers:

    278
    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)

    Auto Technician

    Satisfied Customers:

    278
    16 years of experience
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    ASE Certified Technician

    Satisfied Customers:

    167
    ASE & Bosch Master Tech. 30 years experience.
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    Toyota Technician

    Satisfied Customers:

    1132
    ASE Master Technician advanced level specialist. Wisconsin certified emissions state inspector
  • http://ww2.justanswer.com/uploads/CA/caprio23/2014-4-30_201741_20121205122939.64x64.jpg Anthony's Avatar

    Anthony

    ASE Certified Technician

    Satisfied Customers:

    373
    ASE Master Automobile Technician with over 20 years exp. in this field.
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    9
    Toyota tech. ASE Certified Technician
  • http://ww2.justanswer.com/uploads/SK/skyvisions/2012-6-9_23736_JACropped3.64x64.jpg Skyvisions's Avatar

    Skyvisions

    ASE Certified Technician

    Satisfied Customers:

    11403
    Toyota Master Diagnostic
  • http://ww2.justanswer.com/uploads/genchigenbutsu/2009-05-09_003043_cimg16431.jpg Genchi Genbutsu's Avatar

    Genchi Genbutsu

    Toyota Master Technician

    Satisfied Customers:

    3425
    Toyota Certified Master Diagnostic Technician, ASE Master Technician with L1 Advanced Engine