98 Civic LX 164000 miles. Recently has new timing belt and water pump, distributor E3plugs NGK wires new aftermarket CAT and new tires as well. It used to get 300 miles per tank now only 200. timing was previously about 2* retard, tried at 2* advanve with no change. NO ckeck enging lights or codes. PCV works properly.. Any ideas what would cause this much of a drop without throwing any codes???

 

burnt out check engine light bulb? Does it come on when you first put the key in?

 

It works fine..

 

I got the same problem and I have 130,000 miles but it's been like that for a while.

 

i have same problem.. i have a EK with 105,000 miles on it had it serviced and everything but still even on the motorway doing 70mph only gives me round about 200miles and in town its just bonkers 20 pound only gives me about 80 or less miles thats if its over half tank man i dont no WDF is going wrong iv put it down to engine being old and with many miles correct me if im wrong

 

^^^That's a bold statement.
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To get some ideas on what to check, have a look at this thread:

https://www.hondacivicforum.com/foru...ad.php?t=82689

Also make sure you are adjusting the ignition timing with the service connector jumped and aligning the pointer with the red mark on the crank pulley.

 

Thanks Ron, (once again) I had my timing too retarded, just like the operator I set it correctly and now its about right. Drove 40 miles allready and gas gauge has bairly moved. Looks good for now. Thanks for helping me un-stupify....