Tegra

My car is still running like ****. I am getting less than 20 MPG and I am driving like a grandma! My oil is getting gas in it (but not smoking). It has 108,xxx and is an LS. I have replaced the following: cap, rotor, plugs, cat, pcv valve, injectors, FPR, o2, reset ecu(a few times), compression is fine, timing belt and timing are both good. I posted my problems a while back, got a few suggestions, but the problem still won't go away! There are very few things left that it could be. It's obviously a fuel problem of some sort. Any suggestions are long awaited...


[Modified by Tegra, 12:23 AM 3/5/2003]

Tegra

ttt

Tegra

*sigh*
ttt

Sukebei Oni

how do you know that gas is getting in your oil?
well even though your know blowin smoke, you might want to do a compression check, just to see where your at.

Loveless

I'd like to know the solution to that problem too (60k miles)
I just changed the wires today and it fixed my weird idle problem!

maybe it's your fuel filter? because that's the next thing I'm goign to replace to stab at the low milage problem.

NightmareApex

hmmm sounds almost like my friends dohc ZC motor problem, he has a dohc zc motor in a 91 4dr civic, and hes kinda lucky becuz when he got the motor from japan it was built already, but the only problem is that he gets around 18-40 miles to a tank. Like i didnt believe him at first but he had a full tank of gas one day, and we where fixing somethn and I had to drive it from his house to mis cousins house and its only like 10mins away, and that took a 1/4 tank. he like u is spending alot of money trying to figure out what is wrong with it, and by now he could have just gotten a b16 or somethn, so I would suggest getting another LS motor. its under 1000, and you'll be fresh to rip a few gears, and ull have alot of spare parts hehe.
but if you do go this route always keep in mind the little things that add up so always tack on a few extra $$$ for bs that you dont know about of forgot about.

If you cant aford a new motor you definatlly need to get ur gas in the oil leak checked stat, and ur poor milage could also be dew to a bad altinator, but like I said labor on a honda altinator u might as well get a new motor, its not that much more, so hope you the best of luck, plz post back on any break throughs or AIM me my screen name is kekoatyper

Tegra

Where can I get a new LS motor for under 1000? Even if I did get a new one, most new motors under 1000 would probably require that I use either original sensors and/or accesories. Chances are it is one of those anyway, so I would be back where I started. I have seen alot of solutions on this forum for a wide variety of problems, kinda weird that noone would have had this problem, or knew how to fix it.

TerribleOne

I say replace fuel filter, after 108xxx it problebly has never been replaced when its recommended every 30xxx

Tegra

I'll try that, but if anything I would assume that if the fuel filter was bad it would restrict fuel, rather than make it run rich.

x00gsr

Bad piston rings or a bad block.

Rtzx9r

You say your car runs like crap and gets bad milage-

This could VERY well be caused by NOT Enough gas getting to the car. For 15 bux replace the filter.

And how do you know you have gas in the oil?

b18bfreak

bad rings, blown gasket..
compression check is you answer.

Tegra

My oil slowly overfills, is very thin, and smells BADLY of gas. Not a slight smell like normal. Trust me, gas is in the oil.

Brian_TII

It is possible that it's just running VERY rich? Do you have black smoke out the exhaust? Does your bumper get covered with soot?

Tegra

Yes, I know it is running very rich, and yes I am getting black crap all over the back of my car...the question is, what is causing it. Read above to look at all the things I have replaced.

Tegra

Maybe my cams are not aligned with each other? Could that happen, and could it cause my symptoms?

Sukebei Oni

not likely. maybe try doing a leak down test.

Tegra

Alright compression and leakdown are next. How exactly do they do a leakdown test?

Brian_TII

Have you checked the ECU codes? Is it possible your check engine light doesn't work? (isn't coming on, and there is something wrong)

Tegra

It comes on when I start the car, but no codes are flashing. Is there another way to check them?

ragejed

just go through and do all the normal maintence that was spose to be done first

MOteggy

good luck

PatrickGSR94

iTrader: (1)

leakdown test is when air is pumped into a cylinder to a certain pressure, then monitored to see how much pressure is lost. This is useful if your piston rings and/or cylinders are not sealing well in one spot, but might be fine in another spot. For example you might have scored piston walls in the middle of the stroke, but it's fine at top and bottom dead center. While that might yield okay results on a compression test, the leakdown test would indicate the problem. Usually this test is performed with the piston at different locations in the cylinder (top and bottom dead center, and somewhere in between).

Sukebei Oni

a leak downis also useful to find out if your intake or exhaust valve is leaking and if your head gasket is leaking. you can find out which one it is by listening in the valve cover or intake or exhaust or cooling system. also there is wet and dry compression test. the wet one being squirting some oil in the cylinder and seeing if the cylinder pressure gets better from the dry test. if the pressure is bad and the oil from the wet test didn't make the pressure better, then you know that the rings are probably not the problem.


[Modified by Sukebei Oni, 9:39 AM 3/15/2003]


[Modified by Sukebei Oni, 9:40 AM 3/15/2003]