Would 87 octane gas through a cel?
05-13-2010, 05:48 PM
#41
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It's not your tank, its your fuel sending units in the tank that have gone for a ****...sends the fuel level in the tank to the gauge. When mine went bad the first time, i'd fill up, it would only read 3/4 of a tank, go down really fast...like today, i filled up...only put in 38 liters (almost exactly a half tank, yet my gauge had read i only had a 1/4 tank left...getting mine replaced..again...under warranty...
05-13-2010, 05:49 PM
#42
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i think this might be a face palm moment but would extremely low oil through a code.
im running an 05 de non rev up which i didnt think have oil burning issues but this happened to me last time although no engine light and the oil wasnt as low as it was today? i didnt really acknowledge the oil burning possibility last time i changed my oil but after about 1.5 month after my changed i checked my oil and it was abnormally low but my parents claimed that there was an oil spill on the garage floor but i checked for leaks and nothing and i dont park in the garage unless im home working on my car the thought did cross my mind but i brushed it trying to be hopeful anyway i filled up the oil which was about 3k miles ago and i was planning to change my oil next month and im pretty good at changing it out every 3k i was hoping to stretch it a bit since i use royal purple.
i guess its just a lesson to checking my oil more often.
i cleaned my maf, put about 3 quarts of cheap oil in to get me home so i can change it out this weekend but some premium in and ran it for the suggested 20 min and reset my ecu hopefully this solves the issue
im running an 05 de non rev up which i didnt think have oil burning issues but this happened to me last time although no engine light and the oil wasnt as low as it was today? i didnt really acknowledge the oil burning possibility last time i changed my oil but after about 1.5 month after my changed i checked my oil and it was abnormally low but my parents claimed that there was an oil spill on the garage floor but i checked for leaks and nothing and i dont park in the garage unless im home working on my car the thought did cross my mind but i brushed it trying to be hopeful anyway i filled up the oil which was about 3k miles ago and i was planning to change my oil next month and im pretty good at changing it out every 3k i was hoping to stretch it a bit since i use royal purple.
i guess its just a lesson to checking my oil more often.
i cleaned my maf, put about 3 quarts of cheap oil in to get me home so i can change it out this weekend but some premium in and ran it for the suggested 20 min and reset my ecu hopefully this solves the issue
pull out spark plugs, check for oil leaking from the spark plug grommets on the valve cover..
Also do a compression test while you have all spark plugs out.
Good luck
05-16-2010, 02:33 AM
#51
More power on lower octane is true only if you have more control of the cars ignition system/timing AND that you are not running high compression. But if your ecu is pushing to advance more and more with a block that is considered somewhat high compression, the lower octane stumbles with early detonation because it burns more volatile due to being easier to ignite. So I disagree on your statement that the Z makes more power with 87 gas than it does with 91/93. I definitely can assure you that I have done my 6 months of testing to justify saying it. 87 = bad. If you run it often (I'm sure there are a few that have) you can hear when you start the car or shut it off it does a "click click click" aka knock knock knock. 89 merely power fades at high rpms for obvious reasons that it retards timing slightly from pinging earlier than the engine ecu was expecting. But the change in MPG for the 3 months duration of testing clearly proved to me that the loss of almost 1mpg (0.6 - 0.9 mpg to be exact) is not worth it to run 89. Plus with 91, no power fading at 5500rpm. High revving and low octane don't compliment each together.
Some wonder why bother with testing lower octane fuel? Well frankly because I want to know that I'm not running more octane than the ecu will be able to handle and engine able to burn. And because I'm cheap. If I can get away with something for cheaper and lose nothing, I'm gonna do it!
Some wonder why bother with testing lower octane fuel? Well frankly because I want to know that I'm not running more octane than the ecu will be able to handle and engine able to burn. And because I'm cheap. If I can get away with something for cheaper and lose nothing, I'm gonna do it!
05-16-2010, 02:43 AM
#52
I can't confirm this on the Z, but this is what I did on a few German cars to fix the never full reading problem. My Z is starting to not read full anymore since for the past 2 years I only pump 3/4 tank versus full tank. And the few times recently I did a full tank, it doesn't quite touch the Full marker anymore.
05-17-2010, 10:34 AM
#53
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Does anyone know if the test pipe nonfouler mod ever fails after so many miles I have about 2k on then and it's the only thing off the top of my head thT would cause my ses btw it came back coming back to base this morning roughly about 350 miles after I resett it on Friday. I changed out ally fluids and she's been running beautifully pretty much as new as you can get for 89k miles anyway there's no knocking no noticiable gain or minus in hp in torque she's ran fairly well through a couple twisties this weekend to. Any ideas at the possiblities I'm actually going to get the code read on wed but any ideas in the mean time would be appreciated
05-25-2010, 12:03 PM
#54
if you used the nonfoulers it's very close to foolproof majority of the time. However, what you might be experience is defective oxygen sensor. you're at 90k so it's near it's time for the oxygen sensors to start dying. All you need to do is scan it... until you scan, you will never know exactly whats the problem.
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