redtop 3sge woe's |
redtop 3sge woe's |
Sep 24, 2013 - 10:24 PM |
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Enthusiast Joined Dec 27, '11 From minnesota Currently Offline Reputation: 0 (0%) |
the long
so my engine has been running like its on two maps or somthing. it started doing this after the last track event in july, i've been trying different things on it since then. its a redtop 3sge im wondering if anyone has ever had an engine of theirs do this. i feel like im chasing a ghost since every time i think i make break through it seems to come back. first diagnosis was on a dyno, testing for air fuel ratio, in 4th gear at wot around 2,000-4,000rpm the air fuel was in the 17's and then got to about 11.9 at redline. lowering the spark plug gap to 1.0mm seemed to have made a difference there. i then installed a fuel pump after and it seemed to drive well for the most part, i then replaced the fuel filter a week after the new walbro 190 pump. did an on car injector clean with an on car cleaner kit. the car still occasionally hesitates in 2nd gear or 3rd gear at 1/4 throttle if i was to give it quicker throttle inputs. at the moment i got more parts comming, COPS and a new vvti cam pulley. i just dont understand why an engine would do this, you can feel the difference in throttle response. the short symptoms. intermittent hesitation 1/4 throttle, or quick throttle inputs. drives like it has power, then drives like it lacks engine torque at times. certain times WOT in 1st from a roll will be super powerful you have to hold onto the steering wheel to keep car straight, other times same 1st gear roll will feel less powerful by quite a bit. what i have done. - fuel pump, walbro 190 - new fuel filter - adjustable fuel pressure regulator set at 43psi - new tps sensor - tested with new water temp sensor - tested 1mzfe maf, swapped maf, 1mzfe car still ran fine - checked most connectors and repaired any cracks in insulation - new 2 ga ground cable - cleaned fuel injector with on car injector cleaning kit - seafoam oil, ran in fuel tank also - o2 sensor is 1 year old - new spark plugs - inspected vvti solenoid, its clean and functions - checked for vacuum leaks what i have not tried yet. - new COP - new vvti pulley - knock sensor - new ecu i dont know if the cam angle or crank angle sensor has anything to do with this. it doesnt have any symptoms related to these two. thanks for any insight. |
Sep 25, 2013 - 7:53 AM |
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Enthusiast Joined Dec 27, '11 From minnesota Currently Offline Reputation: 0 (0%) |
compression tested 180, 175, 175, 170. it was just me cranking on my odyssey 680 and no one to look at the gauge.
the fuel stuff was changed in due to the dyno tuner being a friend and ase certified tech suggesting the old 220,000 mile original fuel pump did not have the initial burst of pressure and thus cuausing the lean initial throttle. the car was like this after a track day, 5 20min heats. so i chased the fuel system more since at first the walbro did improve the initial throttle response and torque, however somtimes when it ran strong with partial throttle the transition to full throttle almost seemed it leaned the car out or over flooded the car. and other times when its less responsive the transition to wot will accelerate like crazy. when it drives strong it drives like it should making you feel "this is how it should be", but when its bad you can tell. also yes i know my iac is acting up, i can hear it sounding like a drill when you barely touch the trigger. just didint think it had this much affect on the car since it just bypass air for idle. all the master techs at the toyota i work at say the IAC has nothing to do with response or power thats why i never bothered to look here. somtimes engine idles at 500rpm. exhaust is 2 1/4 with an mangnaflow muffler. intake is factory maf section cut for a cone filter, i've ran the sard and 1mzfe before this with no difference. i also have no cel. This post has been edited by rdyzz: Sep 25, 2013 - 12:30 PM |
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