bad gas or what???

[96greenmachine]

well i went to race trac 1 day got bout a 1/4 tank to make it till friday and the next day b4 i got more gas i was trying to get on the freeway and then all the sudden the car acts like its running out of gas the car was sputtering and missing VERY bad and so later i got more gas at shell filled the car up and every now and then it still does it,its been doing this ever since last friday and i dont know if theres bad gas left in my tank or is somthing else wrong with the car cuz i changed the fuel filter added gas additives and cleaners and got more gas and still does this at least 1 time every time i go off somewhere, can someone tell me what to do?? this is my 96 3.8 im talking about just to let u guys know...

[auto666]

Re: bad gas or what???

could be your tps try to see if your getting into the gas the same amount every time it does it tthen when it does it try pushing the pedel farther

[96greenmachine]

Re: bad gas or what???

is tps throttle position sensor? i should mention it only does this when i mash the gas wether its alot or a lil bit, and sometimes when i start it it stalls

[auto666]

Re: bad gas or what???

tps = throttle positioning sensor thats probably not it if it stalls when you start it though

[96greenmachine]

Re: bad gas or what???

it rarely does that but it does it...so what else could it be then??

[auto666]

Re: bad gas or what???

i keep coming back to your map sensor since it only happens in low vac situations try putting in first and drive it up to around 3000rpm then nail it see if it does it then if not my bet is the map it would be odd though

[96greenmachine]

Re: bad gas or what???

leave it in 1st? or make sure its in 1st in drive?

[josh98bird]

Re: bad gas or what???

change the fuel filter again... it may have clogged with bad gas and then the new has build up since there was more bad gas in it.... otherwise i'm not sure. My dad's truck did this and we changed the fuel filter twice... it got better but still does it no matter what.

[josh98bird]

Re: bad gas or what???

leave it in 1st? or make sure its in 1st in drive?

leave it in first so you can monitor rpm

[auto666]

Re: bad gas or what???

leave in first as in all the way back not in drive
(make sure you dont over rev just had to put the warning in here)

[96greenmachine]

Re: bad gas or what???

i just tried it just now it didnt sputter at all, it ran normal... i dont understand it at all...and no i didnt go over 4500 rpm's

[auto666]

Re: bad gas or what???

i try the changing your map should be fairly cheep

[auto666]

Re: bad gas or what???

no so cheep 60 bucks at checker you could look up a way to test it probably in a service manual or on the net

[96greenmachine]

Re: bad gas or what???

your certain thats the problem? i mean my car can be running real good and then poof it starts sputtering and missing.

[96greenmachine]

Re: bad gas or what???

no so cheep 60 bucks at checker you could look up a way to test it probably in a service manual or on the net

would it thow a code? my SES light is on...