hey guys..i posted this before and thought i fixed my problem but it came back!!! my car is a 1990 honda accord exr with 240000km and has been up kept to a tee. recently i noticed that the milage is very poor. i have replaced many parts (list below) and dont have a heavy foot.after replacing parts like the 02 and plugs..my milage has gotten worse. do u kno why my car drinks gas like crazy and do u have any suggestions to fix this problem??? would that seafoam stuff work?? any help appreciated.

things fixed:
plugs
wires
02 sensor
air filter
oil change
tire pressure up
fuel filter
hole in exhaust and new muffler put on

wat else?? anyone suggestions please anything to get me better gas milage right now its a buck a litre here in canada and thats sux!

 

Do you smell gas at any time? It might be leaking out. How does the engine run? Good, Bad?

 

Did you clean out your egr system? EGR Ports getting clogged is a very commom problem with these cars

1. you have to remove injectors and fuel rail
2. drill out rivits holding access cover on intake
3. clean out EGR passages using pipe cleaners along with with intake cleaner (or brake fluid if you take the intake OFF)
4. clean the access cover
5. clean EGR valve
6. drill and tap threads for 2 10MM bolts about 2 cm long where the rivits were holding the access plate on

 

http://www.ozaccord.com/forums/showthread.php?t=27

on top of the other advices , do a valve adjustment.. go to that link for step by step instruction, if you need help......Also have you checked the timing ??

 

You could also have a bad Engine Coolant Temperature sensor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by amckee &raquo;</TD></TR><TR><TD CLASS="quote">You could also have a bad Engine Coolant Temperature sensor.</TD></TR></TABLE>



Yeah, get that checked out. There was another thread not that long ago, of someone with a similar problem regarding bad gas mileage, after he changed alot of other things, it turned out to be the Engine Coolant Temperature sensor in the end.

 

you could also have a bad cat converter too.

 

id say try that egr port cleaning and get that ect sensor ryt that it worked on mine you can try that seafoam only costs 6 bucks but that wouldnt be the problem it to big

 

gonna try see foam...i cant see it being my temp sensor because my car wamrs up pretty good... the fan comes on after i turn off the car...never wen the car is on...but thats another story...ay other suggestions?

 

The Engine Coolant Temp sensor has nothing to do with whether or not your car is warming up or gettintg hot. If the ECT is bad, your performance will not suffer, but your economy will. It is the sensor that tell your computer that the engine is warm and to allow sensor input to control fuel and fire. If it is bad not only will you be running on a rich fuel map, but your EGR will not be enabled and your O2 sensor will not be allowed to lean the mixture either.

 

wouldnt this turn on my cel?? and if not how do i kno if it is bad? where is it located... i will take it off and puit a new one on... thanx for the help guys keep teh responses coming