mr_gs-r

Ok well heres the deal, my teg is an 00 gsr shell with a 99 jdm r motor. Well every since i finshed the swap i've been having a peoblem with it starting aftee i fill it up with gas.

I will run it down to 1/8 or 1/16th of a tank sometimes empty and then fill it up with premium gasoline. While the gas is pumping i will pop the hood check the oil and other fluids to make sure everything is in check. Well after fillup put the gas cap back on and get back in the car, start it up and then it procedes to drop idle and bog/almost stall then pick back up and idle fine. If i shut it off and start it up a second time it is fine no bog/idle drop at all just starts and idles fine.

So i figured i'd try to narrow it down to see weather it was just at fillup of when i remove the gas cap or something else. So i run it down to about 3/4 or a tank or so and then stop and remove the gas cap, put it back on get back in and start it. No stutter no bog no idle drop, idles fine. So i repeat the process at 1/2 a tank, 1/4 a tank and at all three checks it doesn not do what it does when it is at empty and i fill up.

I think this may be somehow related to either the pressure release when the cap is removed with a small amount of fuel in the tank, or it may be a pump problem.

Just going to see if anyone had had this problem before of even ever heard of someone having this problem!

I plan to do some more torubleshooting and see if i cant narrow it down. And advice or solutions would be greatly appreciated. hope i described it good enoguh for you guys to understand whats going on.

tank was removed and cleaned using a process similar to a hot tanking so i doubt its trash in the tank. Were not talking about me running it past the E, the fuel light isnt even close to coming on when i fill up. Also it is still a couple of ticks above the red E line when i fill up and notice it doing this.

I'm from GA so i dont know about the ethanol thing. The fuel filter was replaced shortly after the tank was dropped and cleaned etc.

Got to thinking, when we first started the swap up we had a slight "skip" at idle, like a misfire almost. After it would run a few seconds it would be fine, my mechanic friend who was helping me do the swap said he tought it sounded like an injector leaking down . It would only skip like after it had sit overnight and we came back the next day to work on it for the first 5-10 sec it would have a faint skip then it would go away. Well we ran some lucas injector cleaner and it didnt do it anymore after that.

I wonder if i need to swap out the injectors and see if that may be the problem. It could still be sticking or leaking down.

I appreciate the help guys i've been thinking on this alot, but i figure 20 teg guys thinkin is better than 1...lol.

I will swap injectors tonight if anyone can verify that the gs-r and type r injectors are the same size, i'm almost positive that they are just want verification form an outside source.

I am also considering a walbro 190lph fuel pump think a 255lph is overkill cause wheni get finished with my all motor build i'm looking to be aroung 220-225hp .

mullet eater

About 2 or 3 cars ago it wasnt an R but a Honda i had a problem like that so the first thang i tried was a fuel filter and it ended up being that. But you could check the gas cap like you said or you could check the fuel pump.But whatever it ends up being just remember small problems could cause big problems. Good luck

mr_gs-r

yeah well like i said i really dont think its a major problem with the car, the fuel filter was replaced but it was a little while ago maybe a couple of months or so. May have piced up some trash or something at a gas station. I'll swap it out again its not an expensive part and if it fixes it then its worth it.

Comp tested it the munbers were the same it was 2 months ago, also checked the plugs not lookng bad at all, they had no white on them and wernt really black.

This is just sorta one of those annoying little quirks that cars have from time to time.

a1320addict

iTrader: (1)

I'm literally half way out the door to work, I didn't get to read your entire thread, but I had a similar problem; make sure you let pressure build up in the lines. Wait for the CEL light to go off when you turn the car to ON, and then star her up.

mr_gs-r

as in let it build up pressure in the system or what correct, let the fuel pump prime? Would this be an indication of my fuel pump going out or what?


Modified by mr_gs-r at 2:35 PM 6/8/2006

a1320addict

iTrader: (1)

yes, let pressure build up in the lines.

mr_gs-r

well last night just happened to be a fill up night for me. So i pull into bp with hope that the advice i had gathered would work. So the gas hand is around the E maybe 1/8th of a tank or so.

So i hop out pop the gas lid remove the cap, start pumping. Walk around to the hood raise it check all fluids everythings good so i admire her for a sec then the pump clicks off.

So i walk back remove the nozzle from the tank, replace it on the pump. Screw the cap back on make sure it clicks 3 times or so. Then i close the fuel door.

The moment of truth. I turn the key to the acc position, i listen for the pump to prime and wait on the cel/other lights on the dash to go off. They do so i crnak it, strts up fine then immidately after it boggs almost stalls picks back up and idles fine.

Well i shut it off, try again and it starts and idles fine. So i'm at a loss here guys. This advice didnt work anymore ideas? Thanks for the help.

Oh and i ordered some parts from honda including a fuel filter, if i get lucky they will be here today, but i'm expecting it to be monday.

mr_gs-r

ttt come on guys 100 hits and 7 replies someones gotta have some ideas. Thanks for the replies that were made though.

Someone on t-i said it may be becasue i was overfilling the tank, i always remove the nozzle after it clicks, i dont try to pump any more thats just extra weight to haul around...lol

kruthles

I had a exact problem when switching from obd2 to obd1 in my 00

fill up with gas, go to start the car, it would take a few cranks then stumble for a few seconds then after that it would run fine untill the next fillup

it would only happen when I removed the gas cap.

It had to do with the difference of when the evap purge solenoid would open, if I remember right obd1 would open right when you started the car and obd2 would wait until after the car had been running a while to purge.

The fix for me was to unplug the evap purge solenoid

mr_gs-r

ok well thanks for the help i removed the evap (charcoal) cannister, but i dont recall if i unplugged the purge solenoid or not. i'll bust out the helm, track it down and unplug it if it isnt and see if that helps.

Thanks for the help kruthles.

mr_gs-r

i havent converted from obd2-1 but i did convert from obd2b to obd2a...but i do know the jdm engines use a different evap purge system than the usdm ran ito that when i was hooking up all the vac lines thats why i just removed the cannister and capped the unused vac ports.

01usjdmr

What did you ever do with the eld code? Other than this did you get your engine running right?

mr_gs-r

engine is running great and has been running great for like a month now. THe eld code was being caused cause we had some plugs swapped.