Jump to content
SAU Community

Recommended Posts

Hey everyone,

Im going to take my car to a qualified mechanic for a full diagnosis, but i thought id ask you guys first so I have an idea of what cost i have coming my way.

Ive just imported an R32 GTS-T 4 door, and when I use about 3/4 throttle at above about 4500-5000 rpm, there is a big power loss and the exhaust makes the same rumbling that happens when the engine is on the overrun after lifting off at mid-high rpm. The power loss seems to come it at the same time as the (factory) boost guage reaches its maximum. It seems to happen most when the air is cold. On a hot day i could drive very hard without any such problems. I havent used full throttle in these conditions so i dont know whether it clears up with more throttle (aftraid of killing car).

The other symptom is that the fuel pump is very noisy, and can be heard over the 3.5 inch HKS exhaust up to about 1/3 throttle. Im not sure whether its a noisy aftermarket fuel pump, or whether the current fuel pump is dying.

Do these symptoms sound like a faulty fuel pump causing fuel starvation? I was thinking the fuel may become more viscous or something in the cold which is why the symptoms arrise... or the fuel pump may be less efficient when cold... Anyways, Im not very good mechanically, so I'd appreciate the feedback.

If it is the fuel pump, what's the bill coming my way? Is it worth upgrading to a larger fuel pump now if I want to increase boost some time in the future? WOuld a used RB26DETT fuel pump be best?

Thanks in advance for any replies!

Link to comment
https://www.sau.com.au/forums/topic/68845-do-i-need-a-new-fuel-pump/
Share on other sites

for your 4500 - 5000rpm problem:

check your spark plugs, sounds like u need to gap them to 0.8mm, if its only in the cold maybe your car is boosting that little bit extra and its missfiring....

i think you might have a big ass fuel pump but im not sure, is it a whining noise all the time or only wen cold???

Changing your spark plugs will help reduce the effects of this problem, but this problem usually stems from your coil packs.

Check out this thread , and also this thread, as the issue is covered a plenty.

Also search for more threads of coil packs, hessitation, misfire as there are about 10^9 of them.....

pull out the fuel pump ya self and check if its got a ject pump in it. see if the fuel tank is clean or there is rust in it. also replace the fuel filter most of the import cars has been sittin for so long that is time to replace them. do a full service and if ya keen pull out the injectors and get them reco. just take one step at a time and you be right. any problem pm me. i used to be a mechanic at BMT

if its whining all the time u might be lucky and have a big pump, if it was whining on and off or only in the cold then i'd be worried, but do wat maxforce says, one step at at time it'll work out...go to a mechanic you know who works on imports and ask him to look at your pump, if you cant do this yourself, and he'd b able to tell you straight away...

let us know how it goes.

Joh

I'd say its hitting the factory boost cut if its boosting to the end of the factory guage. Mine onlly gets to around the half way mark.... Its a fuel cut so it could sound like a dodgy pump.

Cold air will make the problem more obvious as it will boost higher in the cold as the air is denser.

Check this first with someone in the know as your fuel pump sounds like an aftermarket job.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • From what I understand, stock internals should hold out for a while even if you run 500 at the crank, no? Especially if you don't run a modern turbo setup that reaches power and torque much earlier than the original twins. My engine isn't unopened either, it has N1 Pumps, head oil restrictor, new crank and cams, new piston rings, ARP head studs and Cometic headgasket along with 2860-5s. Considering everything is healthy this should run fine for a while I assume. Once my engine stops leaking shit everywhere, it'll be tuned to 370 crank first anyway, because I need to legalize the turbo setup. If I end up needing a new engine because my block actually has an issue, even though GTSboy was adamant that the whole porous block story is nonsense, before putting an engine in I'm probably gonna take care of the weakspots.
    • Hah, I have no issues with what you are doing whatsoever! You clearly know what you are getting yourself into. It's just funny reading things like this. "What's that noise?" "Oh, that's normal. That's just the engine not getting any oil. Nothing to worry about. It'll go away in a moment"  
    • Yeah I'm keeping an eye on it and might take it out as a once off if this doesn't fully charge. I did some research that said it's normal in equalisation charging. Voltage I thought was 20+ (faulty battery in multimeter) but now its on 15.9v, the max it should go to is 16.2v as per the manual. I'll provide an update once hopefully it's actually fully charged and in float mode. Waiting for it to go to 16.2v and not higher and see what happens. What I suspect has happened is that even though it's not an old battery, I did leave the car turned off for almost 4 weeks at one point then left it off for another 2 weeks which might have erroded the battery and is taking a long time to do this equlisation charge.
    • I wouldn't be using the seats a lot since it's on Historic rego and will not be driven a lot, however I also don't want to fork out 3k for something that won't last. Havent looked at BRZ seats, aiming for something of the same era I did speak to him on the phone once, and I do see your point haha. How many kms do you think you drove before they started wearing out? Just had a look at yours, certainly looking for a reclinable version. The Brides don't look too bad! I would still like to sit in one just to make sure it's what I'm after.    Thanks for the replies fellas. 
    • I bought my Bride reps from Crank Motorsport. He is, um, a trifle disorganised. I would have to look back at the e-mails to make sure I got it right, but I think he sent me normal fabric ones when I ordered the "Alcantara" ones. So he had to pay for shipping 3x and I'm sure that f**ked him off big time. And asking technical questions where nuanced English is required is a no go. It's simple English only. And....should I have bought the Alcantara ones? Well, as it turns out, they are great, feel great, etc, but the fabris wore through on the point of the waist bolster in <2 years. Must have caught a rip from a rivet on jeans or shorts, or something like that. So now I have to patch it somehow. A bit shit. My fault, ultimately, because it is Chinesium Faux Alcantara, not the real thing, and it turns ot that it has the tear resistance of a soggy tissue. But the seats and the reails are great. I probably should have gotten the R34 style ones, and now that they price is up in that ridiculous sort of number, I could have sold them for a profit!
×
×
  • Create New...