yeah, the fuel pressure regulator would be my guess. its the only other thing that yur fuel depends on to flow at a certain rate other then the injectors or the pump. But the only difference is, even if yur pump somehow was pumping too much, the injectors would max out, but the FPR is supposed to catch it before it does that...CSUPUEBLOTIM wrote:Do you have the vacuum hooked up on the fpr?
100% chance that wouldn't cause that.CSUPUEBLOTIM wrote:Do you have the vacuum hooked up on the fpr?
shawnathen wrote:im putting a 89 ka24e in a 84 200sx right now and my problem is I think im getting way too much fuel in the cylinders , or left behind in the cylinders .
ive already changed injectors out so I know there not stuck open . maybe a valve is stuck and not allowing the piston to fire at idle ? if you rev the engine it wants to cut out like its flooding ,and like a said pure liquid gas sprays out of the tail pipe like a paint can . ive removed the valve cover and turned it , all valves appear to open and shut fully ??
any and all help would be appreciated greatly
N/A Q45 wrote:100% chance that wouldn't cause that.CSUPUEBLOTIM wrote:Do you have the vacuum hooked up on the fpr?
With no vacuum line hooked up, the fuel pressure goes to about 42-45psi, nowhere near enough to be spewing fuel from the exhaust unless of course the injector pulse is far too large.CSUPUEBLOTIM wrote:
With no vacuum hooked up the fuel pressure goes to pump pressure.
To possibly add to that some:PapaSmurf2k3 wrote:This thread is riddled with misinformation.
It. Is. Not. The. Head. Gasket.shawnathen wrote:I hooked up a maf and air box and it seems to rev just fine with out cutting out ,but starts running ruff after a few minutes .
im thnking I need to do a head gasket. ive done quite a few of them before just not one with a timing chain involved . any pointers?
Well check your oil and antifreeze. Is either dropping rapidly? Is either contaminated in an undue way? (bearing in mind that your oil will be very contaminated with gas, if you're flooding it)shawnathen wrote:I have no cat . 3inch straight pipe . the longer it runs the worse it gets . it starts popping and throwing white smoke
If neither looks all nasty, it's not mixed.shawnathen wrote:water level seems fine ,oil smells like gas and exhaust burns white .burns a lot of gas also . I drove it hard up my street for all of 5 mins then it got rough , exhaust popping loss of power etc.
my exhaust manifold has no fuel return back to the intake ? is that major enough ?
NOT head gasket.shawnathen wrote:with a little tunning and taking the car for a spin it seems to be doing a lot better .
the exhaust still pops every now and then ,but it drives alright .
maybe a little rich still .
shawnathen wrote:I have no cat . 3inch straight pipe
It shouldn't smell like unburnt fuel, either way.sancosys wrote:shawnathen wrote:I have no cat . 3inch straight pipe
Of course it will smell like and have unburnt fuel... Why arnt your running a cat? That 1/128 of HP is worth it? Install your cat.
I wouldn't know why anyone wouldn't run a cat. My car expels water vapor.