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| Thread ID: 142555 | 2016-07-23 22:10:00 | 03' Mitsubishi stalling at lights (wont if I put it in neutral) and reversing... | Kat (17489) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1423555 | 2016-07-23 22:10:00 | Any mechanics have suggestions: I recently put some carb cleaner/gas boost in a full tank of cheap gas (hard to find gas w/out ethanol in it here in Fargo, ND) is this a coincidence? I usually go out of my way for a high octane/no ethanol gas. The check engine light had come on just prior to the start of stalling, but went off by itself before the stalling started!? | Kat (17489) | ||
| 1423556 | 2016-07-23 23:45:00 | Do you intend to use high octane or stay on the cheap? If you stay on the cheap, get the motor tuned to the lower octane! | Bryan (147) | ||
| 1423557 | 2016-07-24 00:21:00 | Is it a high performance engine designed for high octane? if not you are just wasting money, run it on regular and get it tuned. High octane fuel does not have more energy available than regular, in fact it's lower. It is formulated for high compression motors to prevent pre-igniting. If your car is designed for it then it's necessary for it to run properly, if it isn't you gain nothing. Generally only sports cars and high performance cars need it, some motors are designed to run on either type of fuel and for them it's a matter of trial and error to see what works best. |
dugimodo (138) | ||
| 1423558 | 2016-07-24 01:36:00 | also get a scan tool and scan the error codes. that will tell you what tripped the engine light. | tweak'e (69) | ||
| 1423559 | 2016-07-24 01:53:00 | Or an app - like Torque Lite/Pro (play.google.com) to scan codes. Need the Bluetooth adapter... | kahawai chaser (3545) | ||
| 1423560 | 2016-07-24 07:04:00 | Yup . . . . pull the codes and see what is there that the computer didn't like . What you had was a SOFT FAILURE which is still in memory . An '03 Mistsu will have a persistent memory that cannot be erased by disconnecting the battery . I suggest that the car can handle pretty much anything that you can pour into the tank as the ECM will make adjustments to compensate . About the fuel screwing something up - well, it's not likely . . . although a faint percentage of possibility exists for that sortta happenstance . Mistubishis have a propensity to kill their own ISC motors and I feel you did the wrong thing with those additives . The only additive I advocate at this time in my life is Seafoam . Stalling in an injected engine is ALWAYS a problem with loss of full/air ratio in the engine . . . sometimes going to NO fuel and too much air . I digress . I'd go for the ISC motor and clean it out and make sure that it doesn't get any ignition signal while it's out of it's installed location! ISCs notoriously get polluted and the carbon/gunk will keep it from either opening in a controlled-by-the-ECM and/or not letting it close completely and it allows too much air into the plenum . It either case, the engine CAN stall in Drive . I do not believe that your poor choice for fuel had anything but a surprising coincidence-happenstance here . Reverse should have the same results, but there is a small idle boost command in the ECM's library to up the throttle position to compensate for REVERSE BOOST in the transmission . One more consideration - the fuel pressure might be a little low - and that means a fuel pump if the fuel filter is not the culprit . The engine can run fairly well with no real load on it, but when you try to accelerate - does it stall then or has it already died before it starts to roll? More info, please . Pull the codes - Replace the fuel filter (a cheap shot) Report back . |
SurferJoe46 (51) | ||
| 1423561 | 2016-07-24 07:24:00 | Is it a high performance engine designed for high octane? if not you are just wasting money, run it on regular and get it tuned . High octane fuel does not have more energy available than regular, in fact it's lower . It is formulated for high compression motors to prevent pre-igniting . If your car is designed for it then it's necessary for it to run properly, if it isn't you gain nothing . Generally only sports cars and high performance cars need it, some motors are designed to run on either type of fuel and for them it's a matter of trial and error to see what works best . What you say is correct up to a point . "Get(ing) it tuned" isn't an option for that vehicle as there are no adjustable components that can be moved, adjusted or modified without the ECM out-compensating for what you do to try to get around it . It's kinda futile . I also think - to the best of my experience - that all Volvos need high octane fuel too . It's a fact that most ECMs can compensate for high or low fuel octane in the tank . IF you put regular into an engine that calls for higher octane, then the ESC will hear the pinging (or knocking if it's bad enough) and it'll retard the ignition timing and turn UP the fuel delivery to help cool the engine . Both of those conditions will drop your fuel mileage and performance a lot . I've played this game of using regular in a high octane required vehicle and it actually drops performance and mileage, not to mention that it can fuse the catalytic converter into a molten mass if the exhaust gets hot enough --- for a long enough time - remember that the ECM is retarding the ignition and turning up the fuel - both of these are conditions that are Cat killers . If you put 97 R+M/2 premium in a vehicle that only requires 87 R+M/2 fuel, then the mileage actually goes UP ad the performance - after a couple of tanks-full to allow the ECM to plot a new performance curve - will go up more than compensating for the higher cost . It will pencil-out in the next month or two and the engine will have a lot less heat and deposits to handle in the future . Remember too, that oil companies ONLY put their magic fuel additives in their premium fuels, not the regular stuff . So there's that too . I know since I did a summer stint working at a Chevron Petroleum facility in California when I was in junior college . |
SurferJoe46 (51) | ||
| 1423562 | 2016-07-24 08:06:00 | "allows too much air into the plenum" Won't the O2 upstream sensor detect too much air, and increase S/T fuel trim to the injectors? But yet the car stalls. Or maybe system not attaining closed loop, as O2 or coolant sensors malfunctioning. | kahawai chaser (3545) | ||
| 1423563 | 2016-07-24 08:19:00 | "allows too much air into the plenum" Won't the O2 upstream sensor detect too much air, and increase S/T fuel trim to the injectors? But yet the car stalls. Or maybe system not attaining closed loop, as O2 or coolant sensors malfunctioning. I like your thinking there. Yeah - there could be a lot of things going on, but without the codes, we need to wait for more feedback to make a better fling at it. I'll discount the CTS for now though - it seems to not be a mal-player here. |
SurferJoe46 (51) | ||
| 1423564 | 2016-07-25 19:05:00 | carb cleaner in a fuel injected car. Your oxy sensor is most likely screwed now. | Kame (312) | ||
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