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Hi,

I have a Manual transmission 05 civic with 85,440 Km

I have noticed my car has slow response when accelerating like it has lost its quick pick up when pushing the gas pedal.

I have no codes and no cel has come on.

any ideas?

I have changed plugs (I have always used ngk pzfr6f-11), air filter, fuel filter and fuel strainer, cleaned iac valve (just for fun, because it has been idling fine). I also have put injector cleaner in the gas tank (twice).

I have changed oil (using 5w20 mobil) and transmission oil (honda genuine)

Sometimes when I start it, it runs fine and it is really fast to accelerate (like when you feel it wants to go faster and faster) but some other times it seems like it has lost its quick pick up.

I´m really confused!

any ideas? thanks!

 
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Yeah these cars have no *****.

Has your car always been like this or is this something you just noticed?

Depending on what gear you are in acceleration can be virtually non existent.

As a general rule for the 5MT's you need to downshift to a gear that gives you 4000 rpm and only then will you feel any acceleration.

If you have people in the car then forget about accelerating and just be happy the car can hold a steady speed.

Also AC and outside temperature plays a huge part. You will loose power as the outside air temp goes up. If you're running ac then that too places a load on the crank shaft. Generally I notice a huge decrease in performance when the temp and humidity go up.

 
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I solved my problem. I cleaned the micro tiny fuel strainer built-in the fuel pressure regulator.
maybe someone else would have changed the whole part but this are hard times so I just decided to clean it. Hope this helps someone else. Gas quality where I live is really bad so that makes me keep an eye on this and change my fuel filter maybe every year instead of the 4 years my owner´s manual states for this region of the world where I am. I was changing this every 2 years but now I´ll make it every year.

 
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Do you let your gas get low alot?

I should probably clean mine as well as many times I let my gas get low.

 
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Is what you are showing in coming from a fuel pressure regulator or a strainer?
Is this part of the fuel filter or a seperate item? where in a civic 03 would it be located?
Is what you are pointing at in the pic the fuel strainer and rest is the fuel pressure regulator?
im confused. do not have a mechanic's mind sorry

 
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I have over the years let the fuel/gas get almost nil and have filled up $10 gas every few days. What is the difference you think when adding an additive like fuel injector cleaner and/or gas/ stp treatment into your tank with having tank really full and adding an additive in today's market with $10 in gas every few days.
Its very rare that i ever have almost 14 gallons (which i believe is a full tank of gas) in my car ever?

Does it make a performance difference? with or without additives? someone explain? not sure i understand why there is a need to have a full tank when adding additives versus having upto 3 gallons ($10 worth) and adding an additive?

 
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I have noticed my car has slow response when accelerating like it has lost its quick pick up when pushing the gas pedal.
AC and outside temperature plays a huge part. You will loose power as the outside air temp goes up. If you're running ac then that too places a load on the crank shaft. Generally I notice a huge decrease in performance when the temp and humidity go up.



I have had these abovesaid problems very regularly ever since i had a 2003 Honda civic ex sedan A/t rebuilt for my car. after 12k mi and having changed almost everything in the fuel filter, strainer, honda approved transmission fluid and 2-3 times of radiator flush i see no change whatsoever? Is it the head gasket that i need to change?

 
Rep Power: 812

more than likely the auto trans wasnt rebuilt properly or the torque converter is going bad. even a trans in perfect working condition will rob quite a bit of power. if something is old or damaged, it can seriously limit power.

the fuel strainer is a tampon looking pad whereas the regulator is a metal part as posted above. unfortunately both are inside the fuel tank and require removing the rear seat plate to access the pump if you want to change those parts.

i only get 5 gallons of gas at a time and always run down til the gas light comes on before filling. so far no fuel problems for 10 yrs.

 
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Lots of people seem to have issues after these trannies are rebuilt, since the problem started right after that I would take it back to the shop, hopefully you still have a warranty.

 
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yes, every week. My car makes around 550 Km per tank in 7 to 10 days (mostly city driving) that would be about 342 miles per tank and I do let the gas go really low (I can pass 2 days with the blinking orange pump indicator to the point where it does not turn off anymore)

My tank is 13.15 gallons so I fill it up every 7 to 10 days.

In the place I live a gallon of gas costs $ 4.80 so a full tank of gas is around $ 62.00. In a month I can easily burn $ 200.00

 
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I´m showing the fuel pressure regulator and this one has inside a micro tiny fuel strainer. (to see and clean the micro strainer you need to disconnect the fuel pressure regulator from the return line of the fuel filter and disassemble it from the fuel pump assembly)
I´m posting a picture of the fuel pump assembly for you to see it. The fuel pressure regulator is in the yellow rectangle.
Inside of the fuel pressure regulator you´ll find this micro strainer. If you don´t want to clean it maybe you can buy a new fuel pressure regulator (DENSO) or genuine Honda (which is Denso too). You can use compressed air and a tooth brush to clean it.

Remember to oil your o-ring once you put back the FPR to make the assembly easy.

It is a good idea to change the fuel filter and the fuel pump strainer (that´s the one that goes inside the pump´s assembly box) before doing this.



Hope this helps.

Not changing your fuel filter in the specified interval your owners manuals directs you can contribute to damage your fuel pressure regulator and then you can start to have a lot of problems eg: oxygen sensor related problems (getting CEL on for the o2 sensor when the reason for this is a bad FPR) or running too rich or to lean and many more things that can foul you (and your car´s ECU) to think your problem is something else.

Here in latin america the owner´s manual specifies to change the fuel filter every 4 years but I was changing it every 2 years and even doing this my FPR strainer was a little bit clogged. So now I think I´ll make it every year after all the fuel filter costs only $ 40.00 (here) and the benefits are far obvious.

 
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I much preffer to drive a manual trans auto. Here in my country most of the cars are manual trans. Only those brought from USA are automatics.

I think manual transmission is less delicate to operate and maybe the TCO is lower than having an automatic.

Anyway, as Gearbox says probably your transmission was not rebuilt properly and maybe you are having all kind of problems because of this.

Would like to help you more since you seem very concerned about your car.

 
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VOW excellent picture of fuel pump n strainer with the yellow box. Lorolia is an Awesome dude.
Upon early recommendations here i ended up buying an Beck Arnley Fuel Filter and Strainer. So now i need to add a Denso Fuel Pressure Regulator and that will be it? right? I do care a lot about this car, and after atleast 3 different transmissions rebuilt and 2 head on collisions with only 175k mi on the horizon, i love this cars everything just never really am able to let go of it.