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[quote=”Lord Ihcalam” post=37772]not necessarily. injectors can get clogged by dirt or varnish and operate but not efficiently. sounds like your car is still in factory spec, but we all know drivers know their cars better than engineers, and we KNOW when something isnt right. its just hard to find it when the computer says everything is in tolerance.
look up videos on youtube for cleaning the injectors you have. not with stuff yuou pour in your tank but actually removing them from the car. ive seen them but dont remember where.
btw when you seafoamed your car what vacuum port did you use?[/quote]
I’ve usually done the seafoam twice a year. Once at the end of winter, once at end of summer. For the procedure i’ve used the vacuum hose from the pcv valve and only used it through the vacuum and gas tank method. I’m a tad weary of throwing it inside my crankcase even if it is for just 5 minutes. Once all seafoam has been sucked i’ll turn the car off and give it 15-20 minutes prior to starting it and going on a spirited highway drive.
I’ve been calling around today trying to find a shop that would clean, spray test, back flush injectors etc but pondering over cleaning the current ones or buying new ones even though they do not show any visible issues.
That being said, someone mentioned to me today that Honda shows its LTFT/STFT readings in opposite of all other makes:dry: Is this correct? ie. my car currently at idle shows LTFT at -8 and STFT usually around the -7% mark. According to what i was told today by this person, this would mean that this scenario means the engine is running lean and there is more oxygen versus the common sense that the engine is running rich and the ECU is compensating by pulling fuel away.
I find this rather unbelievable as its going against any mechanical manual i’ve ever read.
[quote=”Lord Ihcalam” post=37732]not crazy. necessary. i have security features as well. Mine are a little different than a camera though.
If its not the injectors then i am completely out of ideas. i dont think a bad cap would let gas evaporate that fast. maybe someone else will have an idea.[/quote]
Wouldn’t the injectors show some sort of sign or symptom though if they were leaking or dumping too much fuel?
I have no misfiring(at least do not feel it or have any codes for it), no rough idling, no gas smell near the fuel rail when the car is running or when the car is off.As for the Gas cap, i’ve tested an aftermarket one and switched caps with a buddy with no change to the issue.
PS. Thanks for brainstorming ideas even as much, greatly appreciated.
[quote=”Lord Ihcalam” post=37732]not crazy. necessary. i have security features as well. Mine are a little different than a camera though.
If its not the injectors then i am completely out of ideas. i dont think a bad cap would let gas evaporate that fast. maybe someone else will have an idea.[/quote]
Wouldn’t the injectors show some sort of sign or symptom though if they were leaking or dumping too much fuel?
I have no misfiring(at least do not feel it or have any codes for it), no rough idling, no gas smell near the fuel rail when the car is running or when the car is off.As for the Gas cap, i’ve tested an aftermarket one and switched caps with a buddy with no change to the issue.
PS. Thanks for brainstorming ideas even as much, greatly appreciated.
[quote=”Lord Ihcalam” post=37730]maybe there’s nothing wrong with your car at all. maybe someone is stealing your gas.:silly: or there’s a leak, have you checked for leaks?[/quote]
Now you might call me crazy after this but…
I actually have 2 security cameras in my property one looking at the front/one looking at the back of house where the car is parked. No weird creatures have been caught by the motion sensors stealing gas.As for leaks all 3 gas lines(feed/return/vapor) from the tank to the engine are bone dry. The car has even been parked over cardboard for 1 month and nothing was seen.
[quote=”Lord Ihcalam” post=37730]maybe there’s nothing wrong with your car at all. maybe someone is stealing your gas.:silly: or there’s a leak, have you checked for leaks?[/quote]
Now you might call me crazy after this but…
I actually have 2 security cameras in my property one looking at the front/one looking at the back of house where the car is parked. No weird creatures have been caught by the motion sensors stealing gas.As for leaks all 3 gas lines(feed/return/vapor) from the tank to the engine are bone dry. The car has even been parked over cardboard for 1 month and nothing was seen.
[quote=”Lord Ihcalam” post=37728]i forget did you ever try replacing the fuel injectors? if the dispersal is wrong it might be using too much gas. or they might be spraying to much.[/quote]
That I have not done, mainly because of the cost of brand new injectors and only because i’ve experienced no issues of injectors leaking etc.
In addition that changing the plugs last week all plugs looked normal to me… I actually still have all the plugs saved that i’ve used since i bought the car and shall take a quick snapshot showing condition.
Edit: Snapshot of plugs taken out last week wednesday.
[URL=http://img37.imageshack.us/i/img0156yw.jpg/][IMG]http://img37.imageshack.us/img37/6474/img0156yw.th.jpg[/IMG][/URL]
[URL=http://img195.imageshack.us/i/img0157jr.jpg/][IMG]http://img195.imageshack.us/img195/8700/img0157jr.th.jpg[/IMG][/URL]
[URL=http://img89.imageshack.us/i/img0158ddmucm.jpg/][IMG]http://img89.imageshack.us/img89/8762/img0158ddmucm.th.jpg[/IMG][/URL]One thing that does have my mind boggling a bit is the fact that at idle even though LTFT is at -7/-8%…STFT is still pulling more fuel off at another -7/-8%.
[quote=”Lord Ihcalam” post=37728]i forget did you ever try replacing the fuel injectors? if the dispersal is wrong it might be using too much gas. or they might be spraying to much.[/quote]
That I have not done, mainly because of the cost of brand new injectors and only because i’ve experienced no issues of injectors leaking etc.
In addition that changing the plugs last week all plugs looked normal to me… I actually still have all the plugs saved that i’ve used since i bought the car and shall take a quick snapshot showing condition.
Edit: Snapshot of plugs taken out last week wednesday.
[URL=http://img37.imageshack.us/i/img0156yw.jpg/][IMG]http://img37.imageshack.us/img37/6474/img0156yw.th.jpg[/IMG][/URL]
[URL=http://img195.imageshack.us/i/img0157jr.jpg/][IMG]http://img195.imageshack.us/img195/8700/img0157jr.th.jpg[/IMG][/URL]
[URL=http://img89.imageshack.us/i/img0158ddmucm.jpg/][IMG]http://img89.imageshack.us/img89/8762/img0158ddmucm.th.jpg[/IMG][/URL]One thing that does have my mind boggling a bit is the fact that at idle even though LTFT is at -7/-8%…STFT is still pulling more fuel off at another -7/-8%.
I might be wrong about the tune on a stock ecu with no addition of a standalone ems and shall inquire with a local tuner on the possibility.
That being said…
We all use Shell 87 gas; i’ve tried 89 and 91 with no difference.
We all use 5w30 engine oil…some use dino/some use synthetic(i’ve used dino oil on it since i got it every 4000km)
I’ve considered the tranny being the culprit but it shifts smooth no matter if cold/hot, it never hangs on a gear to the point where it over-revs, it never has slipped etc. That being said the transmissions in the 98-02 accords are known to fail on a regular basis hence my yearly fluid changes versus the manual recommended every 2 years and me changing the 2nd and 3rd clutch solenoids as preventive maintenance.
My car does sit outside; some of theirs sit inside/some out.
The only additives tried by both me/them has been Seafoam, BG44k, STP Fuel Injector cleaner.By “them” i’m referring to 4-5 individuals who all drive the same generation vehicle, as we all partake in a local city car club.
I might be wrong about the tune on a stock ecu with no addition of a standalone ems and shall inquire with a local tuner on the possibility.
That being said…
We all use Shell 87 gas; i’ve tried 89 and 91 with no difference.
We all use 5w30 engine oil…some use dino/some use synthetic(i’ve used dino oil on it since i got it every 4000km)
I’ve considered the tranny being the culprit but it shifts smooth no matter if cold/hot, it never hangs on a gear to the point where it over-revs, it never has slipped etc. That being said the transmissions in the 98-02 accords are known to fail on a regular basis hence my yearly fluid changes versus the manual recommended every 2 years and me changing the 2nd and 3rd clutch solenoids as preventive maintenance.
My car does sit outside; some of theirs sit inside/some out.
The only additives tried by both me/them has been Seafoam, BG44k, STP Fuel Injector cleaner.By “them” i’m referring to 4-5 individuals who all drive the same generation vehicle, as we all partake in a local city car club.
I was under the impression a stock obd2 ecu was not able to be tuned/flashed unless running something such as AEM Engine Management System standalone(which many run for performance under boosted conditions not for economy lol)
Its just the fact that friends/coworkers/family who own the same model car (98-02 honda accord) with the exact same engine/transmission as me, close to the same mileage as me, and possibly not babied their vehicles as I much as I have…get anywhere from 9-10.5L/100km easily with no problem. & I did too and then it all went to hell.
—
The ECU was reset after the addition of the SRI and Catback exhaust allowing it to relearn any necessary parameters. In all honesty the only difference they both make is possibly minimal HP gains and if anything alter only the sound heard from the engine.My car does not have a maf and only has a MAP sensor directly above the throttle body.
The aftermarket wheels are actually lighter than the steel wheels the car comes with OEM.
The car is lowered on Tein SS coilover suspension and has been corner balanced followed by an alignment every year.
It does have a WingsWest Lip Kit installed as of 6 months now which made no difference in MPG.
I was under the impression a stock obd2 ecu was not able to be tuned/flashed unless running something such as AEM Engine Management System standalone(which many run for performance under boosted conditions not for economy lol)
Its just the fact that friends/coworkers/family who own the same model car (98-02 honda accord) with the exact same engine/transmission as me, close to the same mileage as me, and possibly not babied their vehicles as I much as I have…get anywhere from 9-10.5L/100km easily with no problem. & I did too and then it all went to hell.
—
The ECU was reset after the addition of the SRI and Catback exhaust allowing it to relearn any necessary parameters. In all honesty the only difference they both make is possibly minimal HP gains and if anything alter only the sound heard from the engine.My car does not have a maf and only has a MAP sensor directly above the throttle body.
The aftermarket wheels are actually lighter than the steel wheels the car comes with OEM.
The car is lowered on Tein SS coilover suspension and has been corner balanced followed by an alignment every year.
It does have a WingsWest Lip Kit installed as of 6 months now which made no difference in MPG.
I’ve already tried interchanging between my stock airbox and even a CAI(cold air intake) just for the sake of checking. I’ve used my live data scanner and recorded parameters and sensor outputs from my car and compared them to sensor outputs of another car of the same year/model. I have noticed nothing different
The issue was existent with my stock airbox before i changed onto a SRI.
In addition it was present with the stock catback exhaust(2.0″) and my current magnaflow exhaust(2.25″).There is no sub/amp or any heavy system on the car. Pretty much everything that I kept in the trunk 5 years ago is still what i keep in the trunk now with no difference.
The issue has got me to a point of going crazy…
I’ve already tried interchanging between my stock airbox and even a CAI(cold air intake) just for the sake of checking. I’ve used my live data scanner and recorded parameters and sensor outputs from my car and compared them to sensor outputs of another car of the same year/model. I have noticed nothing different
The issue was existent with my stock airbox before i changed onto a SRI.
In addition it was present with the stock catback exhaust(2.0″) and my current magnaflow exhaust(2.25″).There is no sub/amp or any heavy system on the car. Pretty much everything that I kept in the trunk 5 years ago is still what i keep in the trunk now with no difference.
The issue has got me to a point of going crazy…