Bogging on acceleration.

[steveo]

Alright so, I went to jasper for the weekend and the poopra performed well on the way there and around town through the mountains no problems at all. On the way home I fueled with shell v-power in Hinton then again in Edson with the same shell fuel. About 150 KMs out of Edmonton the car just shuttered in fourth trying to pass someone at full boost. I immediately pulled over to check if anything obvious was wrong. I didn't see anything so I continued, shifted through all 5 gears and didn't shutter/bog performed like a champ. Then again about 75 KMs outside of Edmonton the car shuttered in fifth this time not boosting at all. There was another shell I pulled over ran the codes and had a code 25 (lean mixture). Pulled the EFI fuse and the car was great again until I got about 10 minutes from home. Once at home got the 25 code and pulled the fuse. Let the car cool down before driving my girlfriend home. After about another 3 minutes of driving the car was bogging again. I thought maybe the pump in Edson was fucked and didn't pump to full and clicked off rather early and I was almost out of gas (gas gauge doesn't work). So I went to the shell near my house and filled. The car only took about 18 liters which I thought was weird for 200 KMs of driving although it was highway KMs so I shrugged it off my shoulder. Took the car home and let sit for 5 hours. Took it out one more time to wash the bugs off the car. The car shifted through four gears with no boost and cruised at 60 km/h and was fine. Got around hit full boost in second and the car bogged once again. Limped it home again and the car now sits in the garage with the hood open and the EFI fuse out. Does anyone know what my problem is? I searched a little through the forums some notable things that came up were spark plugs, AFM, fuel pump, fuel filter, injectors, and fuel lines. Obviously all to do with fuel and fuel delivery because of the code 25 (lean mixture).

Please help... :1zhelp:

 

[supraguy@aol]

Do you have a way of testing your fuel pressure at the rail? That might narrow the problem down to pump and filter.

 

[jetjock]

Uh, although this code has nothing to do with boosting it's not something I would be doing until the problem is resolved...

 

[SRZMK3]

i second the idea of your fuel pump going out.

 

[steveo]

Well I talked to my mechanic and he had said best place to start is the fuel filter. I will be attempting to change that tonight and hopefully that should fix my problem. Then if it doesn't I must move onto the pump. My mechanic pretty much ruled out the injectors.

 

[steveo]

So update. The car will not start at all. It will turn over but will not fire. We took the plate to the fuel pump off but after looking on the internet all we saw was the fuel sender. We tested the wiring on those two wires coming out of that little compartment and depending on which pin two had power and two didn't. The pump made absolutely no noise at all regardless of the key was on the "on" position or trying to crank over. Correct me if I am wrong but the pump should prime itself before starting should it not? And if it doesn't it did make a buzzing sound at the back of the supra on my car which is no longer being made. I need to fix this... I am deciding whether to take it to a shop and just tell them to fix it or not but I do not have that kind of money right now. Also on a side note since my fuel sender is buggered now would be a good time to take a look at it and fix it also would it not be?

 

[3p141592654]

You need to drop the tank to get the pump out, which is a bit of a problem for you since you filled the tank if I read your story correctly. Before you do that though, you need to confirm that the pump is bad. The diagnostic connector has a pin called FP. Do some research and figure out how to use it.

 

[jetjock]

While what 3p says is true there are several ways of verifying fuel pump condition without dropping the tank.

....Correct me if I am wrong but the pump should prime itself before starting should it not?...

Consider yourself corrected...

 

[3p141592654]

Isn't that what I said, JJ?

 

[Nick M]

Well I talked to my mechanic and he had said best place to start is the fuel filter. I will be attempting to change that tonight and hopefully that should fix my problem. Then if it doesn't I must move onto the pump. My mechanic pretty much ruled out the injectors.

Unless you have a habbit of dumping a lot of things in the gas tank, the filter isn't a place that needs to be checked first. Or at all.

 

[steveo]

Already done... I dropped the tank. The fuel pump is on the way. Going to be changing the filter while the tank is on the ground and also changing out the fuel pump relay once I can get my hands on one. Then if it still doesn't work then I have to go to the injectors fuel lines ecu or AFM.

 

[jetjock]

Isn't that what I said, JJ?

Sorry Jon, my bad. I meant a flow check, max pressure check, things like that. And if you we're referring to more than simply jumpering it on (eg; scoped current probe for checking speed and commutator/brush condition) I stand corrected.

OP: You must enjoy doing things the hard way...

 

[3p141592654]

No problem jj. My post was intentionally obfuscated, I was hoping he would read up on troubleshooting rather than play parts roulette which he seems to prefer.

 

[Nick M]

But dropping a fuel tank full of fuel is fun.

 

[A. Jay]

Or he siphoned it first.

 

[steveo]

Fuel was out via the drain plug on the bottom. It really wasn't that hard to drop the tank... few bolts four lines and it was out.

 

[jetjock]

Regardless, there are much faster and easier ways to check. If there's nothing wrong in there it was time wasted and contrary to what you may think your time is the most valuable thing you'll ever own. Squander it not. Trust me on this...

 

[steveo]

I am a 19 year old kid. I have a lot of time on my hands. Work through the day and once that is done it is all free time for me.

 

[3p141592654]

Okay, so it's out. What have you learned about your pump?

 

[steveo]

The new one will be here on Monday. I fixed both my fuel door and gas gauge. So pulling the tank turned into more then just the pump. I also did some maintenance by changing the fuel filter. Regardless it is starting to turn into "my" car... Since I had no records of the car, it was like starting from scratch. Change anything that is general maintenance and I don't have to worry about it anymore.