Question about 1991 Honda Prelude
Overfilling your gas tank is not a good thing to do. You see, there is a carbon canister that is supposed to filter the air space that is taken up by the gas as you fill up. It's purpose is to remove evaporative emissions and reduce air pollution. If your car is backfiring, it usually means that your car's engine is running rich... getting too much fuel. I would check your EGR as the ECU has the additional air from the EGR factored in to burn cleanly. If the EGR is faulty and doesn't allow the extra air to get into the combustion chamber, the engine will run rich and backfire. Replacing the distributor cap and rotor, and OEM type spark plugs every two years isn't a bad thing to do. Using long-life DENSO Iridium plugs is a better option for plugs. There is also one of two Oxygen sensors screwed into your exhaust pipe to help adjust mixture with the car's computer (ECU)... these may also require replacing with new ones made by the OEM (DENSO is the OEM). The first thing you need to consider is buying a fault code reader and a Haynes manual for your car. The fault code reader will help you narrow down exactly what may be the problems. Look in the emission control section of the manual to tell you what the fault code numbers mean. Basic fault code readers aren't expensive.
Posted on Mar 31, 2015
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Posted on Jan 02, 2017
I also have a 04 with a 1.8L. same problem. I took the fuel regulator off. It is a black box behind the rear tire under car. It only has 2 bolts to take off. After that there is a couple of vent hoses from the tank going to this box. Unplug them and 1 electrical connection. The electrical connection and one vent is connected to a T connection on the box that you can unplug by twisting on the T. Take that T off and look inside where you unplugged the hose on this T. There is a spring and a little plunger inside this tube. The plunger gets stuck. I took a little screw driver and some PB blaster and worked that plunger back and forth a couple dozen times and it unfroze. Put it back together gassed up just fine. I did not look but I was told regulator can be replaced for 200$. But a can of blaster is cheaper.
Posted on Jun 10, 2009
if the fuel pump is all in-tank; the sending unit built in to the fuel pump is most likely malfunctioning; if so, this will require removal and replacement of the entire fuel pump, sometimes expensive, others not so much
Posted on Oct 06, 2009
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Hello tlsnyder52: My name is Roger and I will help you. The problem you have is in the fuel select valve. This was a factory recall a few years ago. The recall number is 91S39.What happens is the valve sticks when you switched tanks. This returns all unburnt fuel to the tank you are not using. Basically fills the other tank while the one you are using goes empty. When you fill both tanks the returned fuel has nowhere to go. The fuel has to go somewhere and pushes out the vent. This is not a hard valve to replace. But I would check as if the recall was not performed it may be under warranty recall. The service kit number is F1UZ9B263B and can be obtained from a Ford dealer. Should You need further help please just ask. Please rate the answer. Thank You for using Fix Ya. Roger
Posted on Jan 26, 2011
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