car running too rich
corona connessuer
Joined: Nov 2002
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From: GUAM
Re: car running too rich
The stock fuel system can flow quite a bit, usually enough for most N/A use. I I'll bet if you get rid of the fuel pump and go back to stock you won't have to worry about running rich any more.
I guess that I have to ask now, why are you planning on going with larger injectors, are you doing a turbo setup? If you don't need an aftermarket fuel pump for a while, put the stocker back in. It isn't worth the headaches to run different fuel system components unless you have some way of doing, and some reason to do so.
I guess that I have to ask now, why are you planning on going with larger injectors, are you doing a turbo setup? If you don't need an aftermarket fuel pump for a while, put the stocker back in. It isn't worth the headaches to run different fuel system components unless you have some way of doing, and some reason to do so.
I drive a coupe
Joined: Feb 2004
Posts: 762
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From: Virginia Beach
Re: car running too rich
I love when people have a problem that they need help solving, but then don't provide enough information to solve it...
What year car? What motor? What flow rating is your new fuel pump? OBD1 or OBD2? Are you using stock 190cc injectors (like on the d16y7) or stock 240cc injectors?
How long have you had this problem? Did it occur right after you replaced the fuel pump, or did it take a while for the problem to develope? What is the gap on your spark plugs? Is your coil putting out enough spark? Are your spark plugs fouled?
What year car? What motor? What flow rating is your new fuel pump? OBD1 or OBD2? Are you using stock 190cc injectors (like on the d16y7) or stock 240cc injectors?
How long have you had this problem? Did it occur right after you replaced the fuel pump, or did it take a while for the problem to develope? What is the gap on your spark plugs? Is your coil putting out enough spark? Are your spark plugs fouled?
Registered Member
Joined: Sep 2007
Posts: 26
Likes: 0
Re: car running too rich
The stock fuel system can flow quite a bit, usually enough for most N/A use. I I'll bet if you get rid of the fuel pump and go back to stock you won't have to worry about running rich any more.
I guess that I have to ask now, why are you planning on going with larger injectors, are you doing a turbo setup? If you don't need an aftermarket fuel pump for a while, put the stocker back in. It isn't worth the headaches to run different fuel system components unless you have some way of doing, and some reason to do so.
I guess that I have to ask now, why are you planning on going with larger injectors, are you doing a turbo setup? If you don't need an aftermarket fuel pump for a while, put the stocker back in. It isn't worth the headaches to run different fuel system components unless you have some way of doing, and some reason to do so.
Thread Starter
Banned
Joined: Feb 2006
Posts: 442
Likes: 0
Re: car running too rich
I love when people have a problem that they need help solving, but then don't provide enough information to solve it...
What year car? What motor? What flow rating is your new fuel pump? OBD1 or OBD2? Are you using stock 190cc injectors (like on the d16y7) or stock 240cc injectors?
How long have you had this problem? Did it occur right after you replaced the fuel pump, or did it take a while for the problem to develope? What is the gap on your spark plugs? Is your coil putting out enough spark? Are your spark plugs fouled?
What year car? What motor? What flow rating is your new fuel pump? OBD1 or OBD2? Are you using stock 190cc injectors (like on the d16y7) or stock 240cc injectors?
How long have you had this problem? Did it occur right after you replaced the fuel pump, or did it take a while for the problem to develope? What is the gap on your spark plugs? Is your coil putting out enough spark? Are your spark plugs fouled?
I drive a coupe
Joined: Feb 2004
Posts: 762
Likes: 0
From: Virginia Beach
Re: car running too rich
Oh, so it is a MAF car...
Check and make sure you don't have any vaccum leaks. It sounds like either you have a large air leak, or your MAF is going bad.
Do you have an adjustable fuel pressure regulator? If you do, check and make sure your fuel pressure is not too high.
Check and make sure you don't have any vaccum leaks. It sounds like either you have a large air leak, or your MAF is going bad.
Do you have an adjustable fuel pressure regulator? If you do, check and make sure your fuel pressure is not too high.
Thread Starter
Banned
Joined: Feb 2006
Posts: 442
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Re: car running too rich
wouldn't a vaccum leak cause the car to run lean?...is there a way to test the MAF?...no adjustable fuel pressure though...but if i were to get one would it solve this issue?...thanks for the input
Racetracks
Joined: Nov 2002
Posts: 15,668
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From: How long is a piece of string?
Re: car running too rich
You should be able to check that the MAF is in the correct range (at idle or whatever) with an OBD2 scanner, and there are usually specific test procedures to check them too. It should say how to do that in the factory manual for your car. You said this started happening when you swapped heads, have you double checked everything that was touched during the installation and are there any modifications to the head, like porting, etc? I would have to assume that there is something rather different than before (i.e. the fule pump,etc) that is not able to be compensated by the ECU. If everything is installed correctly, I'd start looking at either sensor problems or just put the fuel system back to stock until you're ready to solve the problem by getting tuned.
tits anyone?
Joined: Dec 2008
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From: 5-7-5
Re: car running too rich
everybody is right, there is no reason to have a bigger fuel pump with stock shit, go back to stock, and by the way, you dont need to go with a bigger pump for bigger injectors, i ran a boosted d16 on 450's with a bad ass tune and a stock fuel pump, ran this setup for everrrr< never had a problems, but unless your running like a 255 you wouldnt be overloading you reg, its gonna put the same amount of fuel in the rail even wit a bigger pump< you need to start tracing everything, check the reg u got on it now, maybe thats going bad, whats ur fuel pressure at on startup> its got to be the regulator if anything thats allowing too much fuel< just my input tho, maybe im a dumbass....
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