tim_man

Hello All,

the year of my es is: 1993
the problem: oil fouling of #1 spark plug.
I have terrible city gas mileage, when i get on the hwy my gas gauge goes back up to I beleive the actual spot. It also is running like it is missing somewhere. I put it on the code reader and got 52 or 55, but that code stopped coming up once i switched to 91+ gas. Can anyone help me with this issue?

Thanks in advance

llcoolpass

did your valve cover gasket leak oil into that cyl?

you do a compression check? you could have valve stem seal leak or piston ring issue

what codes do you have? I know 52, but what are they?

the gauge and gas mileage part was very convoluded. I take it you have bad fuel economy. this does fit in theory with the oil leak into cyl 1.

tim_man

I haven't tried the compression test as of yet,
yes very bad fuel mileage getting about 210.4 a tank.
Code 52 is knock sensor curcuit i believe.

I will get the test done and will respond once done

Thx

goldlexus9

what scanner do you have I need 1 for my 1994 lexus es 300.Please let me know.Thanks

llcoolpass

Mine is made out of .. well I dont know, but it costs nothing. It's a paper clip.

tim_man

I went and got it checked at a local shop that did it for free.
The paper clip method also works.

llcoolpass

So, what is wrong with your car?

tim_man

it is not running correct, putting hand over tail pipe I can tell it has back pressure some where in the system. So far i did a further look at the rvc and see that it has a leak, the only plug that is getting fouled is plug 1. it feels like it is not running on all six cylinders until i get her up to 60 - 70 mph that is when she is ok. And my gas mileage is alot better on the hwy. in the city the needle drops from 3/4 to 1/2 just regular cruising (maybe FPR not working correct) any clues?

tim_man

Problem solved.
I had a bad injector in #1 cylinder.
Thx everyone