Jump to content
SAU Community

Recommended Posts

Hey people,

I'm doing a turbo upgrade on my R34 GT-T, and before i have put new turbo and stuff on, my mate installed a bosch 044 fuel pump yesterday.

Now as i have never done this before i'm not sure what to expect.

So symptoms that have occurred since the installation ;

i) On the highway in 4th and 5th gear, if i put my foot down there is a delay of about half a second before the car will accelerate.

ii) Even after "priming" the fuel pump (switching to 'on' so the fuel pump builds pressure), it still takes a bit to get started (turns over for a bit then sickly comes to life)

iii) This morning i "primed" it, waited for the fuel pump to stop pumping, then turned over the engine, it kept turning over but wouldn't start, so i tried again straight after and this time, once again, it came to life, but very sickly, it ran rough, felt like a cylinder wasn't firing. i then let it idle at around 2000rpm, and all went back to normal after a few seconds.

Now I'm getting told different things, Some people say it's the fuel pressure reg, and others say it needs to be earthed to the chassis and not use the existing wires. As far as i know, the filter sock reaches the bottom (so my mate says), so i'm not sure what the problem could be.

This is the first time i have touched the fuel line on any car so i'm a bit of a virgin to it.

I'm not sure if this will impact it, but when i was driving to go get the new pump installed, i was cruising along the highway at around 2.5k rpm, and the car hesitated for a second (lost power, but only for a second), engine light came on, then went back to normal and engine light went off.

List of engine/exhaust modifications are:

Superspark coils,

0.8mm gap plugs

3" to 80mm exhaust, no cat (still waiting for one that fits)

Pod filter with standard AFM

and that's about it that i think could effect it.

I have an AEM tru boost, but was only running stock boost when this happened.

Thank you in advance for anyone who can help.

Shaydan

i thought the 044 was an external pump and the 040 was the internal pump? maybe that is part of your problem. or it may have nothing to do with it and it may be fine

if your old pump was dodgy then putting a new pump in may be showing another issue that was previously hidden by a failing fuel pump. this may be something simple like a dirty afm or fouled spark plugs.

The stock Fuel pump was fine,

And yeh you're right about it being external, but you can still use them internally.

The FPR has arrived but not fitted and it's still 50/50, c-red and hyperdrive told me over the phone that i have wasted my money because it's not needed, and others say i need it.

I'm not sure if the FPR is related to the hesitation when in 4th and 5th.

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

    • Sorry to hear your HFM BM57 was faulty,  did you contact HFM I would hope they would be at least grateful for the information if there was some sort of manufacturing fault, you would hope they would be sympathetic even if your item was 2 years old if it had never been fitted. May I ask where it leaked from ?
    • Cats are called Bella, and Donna...  Like that poisonous plant And I remember your 2 monsters, I remember making a little bit of wee when you let them out... LOL I have already installed cat doors into the laundry where their kitty litter is, and the sun room, apart from the cat doors there's not going to be any permanent mounted stuff on the interior walls (interior doors are cheap and easy to replace) I will get a outdoor cat cage thingie once I finish the landscaping out back... https://catnip.com.au/ The only off limit areas are the main bedroom and the gym room....but, currently the cats are curled up in bed, in the main bedroom with the Mrs.....LOL, the off limits for the kittens to the main bedroom lasted about 5 minutes with Jackie I currently only have 1 free standing huge cat tree multiple level scratching post thingie in the lounge room, but, I will be getting another one soon now that I'm happy with the furniture layout in the back room and have a perfect spot for it  
    • All of this is making it seem clear that running the Coppermix twin was definitely the way to go, especially in hindsight with how insane tariffs have gotten and the strength of the USD vs yen at the time.
    • That sounds like no chance of even importing one for road registering then Now I see why Duncan wants to check LHD rules for Targa...   I wonder how "bolt in" the AWD would be if you got one imported from the US and swapped it to an AUD one
    • Not to mention they drive like a bucket of bolts! yuck!
×
×
  • Create New...