Ok, so i turned the car on and let it idle, and it idled smoothly, no problems. As i sat i thought, let me mess with it, so i hit the accelerator pedal nice and slow and the RPM's rose very smoothly. I have an aftermarket exhaust and so it was slightly loud and i was able to tell it was smooth. Then, i let go of the pedal and hit it quickly and the car hesitated, it was so odd. I dont know, so i sat and tried it again slowly and it was fine, then hit the pedal quickly and it hesitated, so i pushed the pedal to the floor while it was hesitating and it just sounded like a slight backfire speeding up, really odd.

My car is a 1994 Honda Accord LX. I have a new ignition coil, new distributor, new cap and new rotor. The plugs are, perhaps 1500 miles old. The plug wires are Nology hotwires. I am baffled as to what might be causing this problem. The only other thing that isnt electrical that i can think of is my AEM fuel regulator, my dad said my car smelled abnormally of gas. So thanks in advance guys!

 

damn, that sounds like there maybe a blockage in the fuel system perhaps, but then if you hit the pedal slowly and it works fine then i dont know, im thinking maybe the throttle sensor perhaps? Anyone else?

 

I have to take out the short ram and put on my CAI tomorrow so what i'll do is snap a few pics of the underhood of my car, that way someone can give me some advice on how i can go about adjusting the fuel pressure regulator because i am a total novice! Thanks guys.

 

ok, my car has decided that now, a few hours later its still doing the same thing, so i dont know! Help please!

 

I think the only thing i havent changed out as far as spark distribution goes is the plugs and wires in my car...check the plugs of yours again, but i dont know how to test spark plug wires...anyone?

 

Take out the spark plug wire point it towards a ground with a lil gap and see if you see a spark jump out. If it does you kno that spark plug wire is good. Not the safest way to do it but it works.

 

hey bra, i have had the same problem, but only while driving,, it hesitates and then jumps into it. i figured out that when i had an engine flush and changed my oil and a basic tune up it stopped doin that. it still does it on occasion and a i run msd wires, cap and rotor, and denso iridium plugs, k&n oil filter. so i have no i diea either..all i can think is carbon build up in ur engine. along with mine. saving up to do an h22 type-s swap

 

My car does the same thing sometimes. I have had the car 4 years now and I have had that nasty intake backfire happen several times since I owned it. That is when I had a short ram intake on the car and since then I replaced it with the stock air box and a k&n drop in filter and the problem has pretty much gone away.

What kind of oil do you run??? I have also noticed when I used to run regular oil it would do it alot more but since then I have switched to royal purple and it seems to be much better with that.

But don't get me wrong she gets in bad moods sometimes and still does it.

Maybe its just an Accord thing?

BTW I have a 1997 LX Automatic

 

Yea, its odd, mine has been doing this for a while now and its basically the root of the problems my car has been given me. WHen it first started happening i thought, wow, it must be a loss in spark so one by one, slowly over a span of a year or two ive been changing out parts given i could get a good deal on them. I've basically come to the point where i dont have any next logical step which could help me remedy this.

From what some of you have said it seems apparent that it might be carbon buildup in the motor, but i dont think anything short of taking it apart and cleaning it thoroughly will fix that? Or perhaps im wrong? The problem with this car is that its so odd. I mean when it idles, if i slowly press on the pedal then it revs up fine, but if i tap the pedal it does this hesitation thing, and it keeps doing it even if i press the pedal harder, its getting me so mad, i guess the only thing left to do is get this H22 motor...this is getting stupid! I guess i'll get an oil change and have them put in some sort of engine cleaner stuff, and i'll throw in some fuel injector cleaner.

 

Slamming on the pedal is called a snap throttle in the business, it makes your engine run lean until your computer can catch up and see that hey, I need more fuel. A lean mixture is harder to fire, gas burns easier than air so you have a backfire since the spark looks for a better place to spark, remember, electricity takes the path of least resistance, usually another nearby path with gas and an open intake valve on the next available cylinder in the firing order. This is all theory of course but true.

Honda uses a MAP Sensor then the O2 sensor to make the computer deliver more gas after you punch it to the floor, initial timing plays a role as does good fuel delivery through the injectors. Go to GM and buy their top engine cleaner to make sure all the carbon is gone, follow their instructions. I am not a big fan of fuel injector cleaner for your gas tank but many techs like it, make sure there are no small vacuum leaks to the fuel pressure regulator or the MAP sensor. get a good clean air filter and fuel filter, fuel pump pressure is low on the lost of issues if the car runs fast at top end still. Good luck.

Duane in Japan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Duane_in_Japan &raquo;</TD></TR><TR><TD CLASS="quote">Slamming on the pedal is called a snap throttle in the business, it makes your engine run lean until your computer can catch up and see that hey, I need more fuel. A lean mixture is harder to fire, gas burns easier than air so you have a backfire since the spark looks for a better place to spark, remember, electricity takes the path of least resistance, usually another nearby path with gas and an open intake valve on the next available cylinder in the firing order. This is all theory of course but true.

Honda uses a MAP Sensor then the O2 sensor to make the computer deliver more gas after you punch it to the floor, initial timing plays a role as does good fuel delivery through the injectors. Go to GM and buy their top engine cleaner to make sure all the carbon is gone, follow their instructions. I am not a big fan of fuel injector cleaner for your gas tank but many techs like it, make sure there are no small vacuum leaks to the fuel pressure regulator or the MAP sensor. get a good clean air filter and fuel filter, fuel pump pressure is low on the last of issues if the car runs fast at top end still. Good luck.

Duane in Japan</TD></TR></TABLE>

First, thanks Duane. Ok guys, the fuel filter i have is new. The Air filter i use is an aftermarket type made my advanced engine management, its a cold air. Both the filters were a pain in the *** to replace but that is done. The engine cleaner i have yet to get but how am i able to adjust the fuel pump pressure? Does the aftermarket fuel pressure regulator play a role in this?

 

i have a question, in my trunk when i lift up the carpeted cover which goes over the spare tire, can i access my in tank fuel pump from this area? I wonder if barnardo has the same problem?

 

for 5th gen and earlier you have to drop the tank.

 

damn, is that something i can do myself or is it something best left to the dealership...

 

Car still does that god damn hesitation thing....and its beginning to annoy me...