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  1. U

    Bad fuel mileage

    It definitely appears to me that the bottom of the fuel tank and the driver's side frame rail of the car next to the tank have been wet with gasoline. I checked the lines the best I could. I does not look to me like any are leaking. I ran the engine with the car up on jack stands while I looked...


  2. U

    performence mods

    For entertainment purposes only: Nearly anything can be done, though some things should not be. I am certain I could make or have someone make a custom intake manifold to run a 350 Holley. I don't think any of the MPFI manifolds on the Civics could or would be worth modifying to run a carb. The...
  3. U

    Bad fuel mileage

    Looks like the link doesn't work on the Helm manual. Item # is 61S0307. I looked all over the underside and underhood of the car today while running and after it was shut off. I still have not found a leak or anything unusual anywhere. I'm going to buy the Helm manual to hopefully aid me in...
  4. U

    200 miles an hr??????

    He did say sohc, didn't he. Oh well. The article still gives a good idea of what it takes to make 200mph happen. OP was probably looking at clicks anyway, as others said.
  5. U

    200 miles an hr??????

    Link to an Import Tuner article about one that did it. He had 543 whp and some aftermarket bodywork.
  6. U

    Bad fuel mileage

    00siboy, I think I have certainly eliminated a few variables here. I worked for a Toyota dealer a few years back, and am familiar with the smoke machine. I pressurized all the lines myself when I had the fuel tank out and could not find any leak. Whatever is leaking must be significant to lose...
  7. U

    Bad fuel mileage

    Well, I'm still going around with this thing. I retested the compression and leakdown, and they are in fact in a normal range. There seems to be nothing wrong with the engine. Also, while driving the car, I noticed that with a full tank the gas mileage appeared at first to be okay. Then I left...
  8. U

    Decat?

    Well, you made a liar out of me. :lol:
  9. U

    Decat?

    CEL will come on. Our test pipe came with a bung for the second O2, as do most, if not all, that I have read of. You can space out the second O2 with a spark plug non fouler, or two of them stacked together if necessary. This gives the Second O2 a reading of slightly "cleaner" exhaust than what...
  10. U

    Decat?

    If you buy into global warming, look into the N2O emissions of a three way catalytic convertor (every modern car has one), and their supposed effect on the greenhouse status of the atmosphere versus that of CO2 emissions of even a catless engine. You tell me which is worse.


  11. U

    Decat?

    This is a touchy subject. I feel it unwise to encourage the aforementioned mods on a forum, though my opinion may differ in person. You will probably pick up a couple horsepower, and the exhaust sounds better to me without the cat. The effect on the environment of one car is a drop in the...
  12. U

    Bad fuel mileage

    Well, we monitored the fuel mileage over another week and came up with 18.6 mpg. Upon learning of this I took possession of the car once again for further diagnosis. I removed the oil cap with the engine running and was quite disturbed by the volume of gas coming from the valve cover. I'm going...
  13. U

    Primary O2 Bad sensor or what??

    Civickid, I will track one down later today. I've tried to make a recording myself, but found that I lack the necessary equipment to make a decent audio recording.
  14. U

    Primary O2 Bad sensor or what??

    Jersey, I was hoping you would get a laugh out of that. We have a bone stock D16Y8, the exhaust manifold and downpipe that came with the car, and a stock replacement cat back. The only component of the exhaust not stock or stock replacement is the test pipe... and a small hole in the midpipe...
  15. U

    Primary O2 Bad sensor or what??

    Ours sounds pretty good without a cat. You sure you're not a tree hugger?
  16. U

    Primary O2 Bad sensor or what??

    I'm curious about this one myself. The only reason I could think of to have the O2 sensor in one of the runners is if it's unheated and needs to be close to the head. I always see heated ones in or behind the collector. That's all just my speculation though. I think Jersey8 may know what's...
  17. U

    Bad fuel mileage

    I'd have to laugh. The coolant temp on the dash gauge appears to be in more or less the same place it always has been. The coolant temp comes up reasonably quickly, and all radiator hoses get hot to the touch, which indicates a functional thermostat. Is there a coolant temperature sensor other...
  18. U

    Bad fuel mileage

    The fuel filter is relatively new. I have not made any attempt to clean the injectors, though I do have the means to do so should I become convinced it is necessary. I think they are okay for now, as the fuel mixture would likely reflect any significant malfunction, at least under some...
  19. U

    Bad fuel mileage

    Well, fuel mixture is good enough under all conditions to convince me the car is running fine and I have just been chasing my tail here. I never saw fatter than 12.5:1 at wot and it was normally closer to 13:1. It was normally 14.5:1 to 15:1 at idle, and leaner than 14:1 while cruising at light...
  20. U

    Bad fuel mileage

    That's a good thought Fusion. I would suspect something mechanical, except the engine seems to be running well. I have driven cars with engine issues, and they usually make themselves known, though not always. I know seat of the pants isn't exactly quantitative, and a compression check will be...
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