I was having some issues with my 98 cavalier, 134K miles 5-spd, throwing up some error codes. TP sensor along with engine running lean and also running rich all at the same time. I replaced the TPS to get rid of the jerking while accelerating and now im getting intermitten engine running lean codes. Any suggestions? I thought it could be fuel delivery so i replaced the fuel filter, which definately needed it, but now my gas milage dropped. I was getting close to 600 miles per tank while running with the bad tps and now im down to maybe 500 if lucky. I have run some fuel injector cleaner thru it to see if the injectors were clogged but the only thing ive noticed was the engine runs really smooth now at idle. i dont even know its running anymore. what else should i look at? i know someone will say O2 sensor but those rarely cause the problem by themselves. This is my daily driver ,about 200 miles/day highway, so any help would be great with the rise in gas prices.
i very highly doubt you ever got 600 miles a tank or your cavalier would be in guiness, nor will it get 500 miles a tank. First thing you need to do is find how much you get a tank. 300-400 in normal
Amazingly enough i do get on average between 32-34 miles per gallon highway. I have a light foot and coast alot!
doesnt matter 32-34 is not uncommon on the highway its that you have like a 13 gallon tank you do the math... unless you have like a 30 gallon tank your not gettin 600 to a tank lol
I get like 340ish a tank.
new fuel filter = gas will be chugged down for the next 1000 to 1500km or so man, its normal. GET over it.
My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
i understand that having an unrestricted filter will allow more fuel flow but why do i continue to get System too Lean codes? is there something i missed? i have gotten over the fact of sucking gas, i own a F150 5.4L. that sucks alot of gas but it rides so nice. i have read that this may be caused from a vaccum leak? any suggestions on where to start or how to make the search for a leak easier?
134K is a good life for an O2 sensor. Raw fuel going past it could foul it. Change the sensor in the exhaust manifold, right off the engine. It's a quick job, and roughly due with 'high' mileage.
Short Hand wrote:new fuel filter = gas will be chugged down for the next 1000 to 1500km or so man, its normal. GET over it.
What the @!#$ are you talking about?
No it means the fuel pump will have to work less ahrd, therefore entending its life.
fuel doesnt chug into the engine you moron. It is pulsed into the combustion chamber from the injector, when the PCM provides a ground. When a ground is provided, the pintle opens for millaseconds or 4 of them, then closes again.
Read up on how a car works before talking out of your ass.
- 2004 Cavalier - 124k, owned since new
I dont know if its just how i drive, but im lucky if i get 250 miles a tank
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Rob S wrote:Short Hand wrote:new fuel filter = gas will be chugged down for the next 1000 to 1500km or so man, its normal. GET over it.
What the @!#$ are you talking about?
No it means the fuel pump will have to work less ahrd, therefore entending its life.
fuel doesnt chug into the engine you moron. It is pulsed into the combustion chamber from the injector, when the PCM provides a ground. When a ground is provided, the pintle opens for millaseconds or 4 of them, then closes again.
Read up on how a car works before talking out of your ass.
I have always had rough mileage over the first 1000km after installing a new fuel filter on any of my cars.. Whether it was our old Mercury Villager, or my 2000 Z. It goes away and is fine. Please, do not have a heart attack on my behalf buddy, this is the internet. Maybe my experiences are freak occurances.. WHO KNOWS.
. You are taking this as if I have taken a shot back at you.
My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
Fuel pressure regulator would keep fuel use in check in modern EFI cars. Older carb-fed engines would take a little longer with slow 'feed-back' control.
