ej22 hard accelerlation problem

paulvandenton · Posted: Tue Jun 22, 2010 9:48 am Post subject: ej22 hard accelerlation problem

Hi,
I have a slight problem, when im in 3rd or 4th gear and i put my foot to the floor its as if i flood it or something theres no imediate power if i back off and accelerate slowly its fine, also if i just accelerate slowly its fine but when i dump the pedal its like there is no power there its kinda feels like its miss firing than all of a sudden i get power back.

Hope this makes sense. Also my fuel pump is whinning really loud i wonder if these two problems are connected. It revs fine under no load ie just stationary.

I dont really know where to begin, im thinking to change the fuel pump to a wallbro anyway.

So anyone had a similar problem?

thanks guys

B4Tfink · Posted: Tue Jun 22, 2010 12:14 pm Post subject:

what vehicle ? t25? and fuel tank out size is it 8mm or 12mm.

whining noise fuel pump you might want to check this thread
http://www.vwkd.co.uk/bb/viewtopic.php?t=2570.

Also ive heard that aftermarket cone air filter opossed to the box subaru one can have a surge type sympton however i have an apexi one and not experienced this could be just the cheepy ones tho? not convinced on this.

more details please ..engine / vehicle / first testing etc?

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1988 T25 EJ25 n/a.. it just makes more sense that way..

paulvandenton · Posted: Tue Jun 22, 2010 3:34 pm Post subject: t25

Hi sorry yeah its a T25. I didnt do the instalation myself so i will have to check, i know its had a new petrol tank but dont know what one. I will measure tonight if i can also will check the whine of the fuel pump by bypassing the tank.

thanks for the heads up on this, its defianetly got louder this last week or so, like its really really loud.
i will make a video later aswell

B4Tfink · Posted: Tue Jun 22, 2010 4:39 pm Post subject:

apologies read this quick lunchtime on the phone so missed..title ej22 avatar t25 Wink

If a new tank fitted since the conversion then it would make no sense to put in a non 2.1 fi tank..easy check would be compare the out and return pipes on the tank they should see a difference in dia`s (8mm return 12mm to pump thats internal dias obviously, std tank both same)

If you have been running for a while ok and the noise has got louder i would advise to carry a spare pump, recently happened to me, got louder for a coupla days then i was kissing the windscreen and stranded.
Still not quite sure of the root cause as ive been running a new FI tank for 99% of the conversion however seemed to start getting noisier after the tank went below the 1/4 mark , previously ive always stayed above that.
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1988 T25 EJ25 n/a.. it just makes more sense that way..

Kai · Posted: Wed Jun 23, 2010 7:46 am Post subject:

Hey up,

I agree with Rich, check fuel tank outlet is the appropriate size and also that your fuel pump isn't up the spout. It's the obvious place to begin especially if it's been getting louder over a few days.

If these don't get you anywhere then I'd start looking at the induction side of things. I had a similiar problem with a MK2 golf. Kept stuttering in the higher gears, lack of power and it turned out to be the airflow meter which was at fault. Strangely enough it went over night. But then as Rich mentioned it could also be a problem with the air filter too.
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Think......

Don't sleep and drive!!!

paulvandenton · Posted: Wed Jun 23, 2010 4:03 pm Post subject:

ok guys thanks alot for your suggestions i really appreciate it.

I will check the tank this weekend, when i change my front shocks, got some nice avo adjustables, hopefully this will cure the bouncing!!

I guess this is the problem with buying someone elses project you have to go over everything!

What fuel pump do you recomend? all i know is that mine is blue. I saw a thread where some people had jags some people had beetle efi's.

Also mine has the fuel filter BEFORE the pump, i guess i should chane this also.

Paul

syncroparge · Posted: Wed Jun 23, 2010 4:15 pm Post subject:

http://www.brick-yard.co.uk/forum/lowered-bump-stops_topic31933_post240130.html?KW=bump+stops#240130 Check this out regarding bumpy ride.

B4Tfink · Posted: Wed Jun 23, 2010 4:45 pm Post subject:

paulvandenton · Posted: Wed Jun 23, 2010 5:23 pm Post subject:

thanks soooo much again.

Just spoke to Richard at rjes and he will sort me out with new fuel filter etc. What a nice guy!

Thanks for the bumpstop advice ill see whats going on under there at the weekend. Its on avo 70mm springs apparently, i thought lowered springs were meant to be stiffer but its like a lowrider bouncing all over the place!.

Probably the worst vehicle in terms of ride quality ive ever driven and ive had alot of poo boxes too. Everything from old beetles to smart cars.

ElusiveStranger · Posted: Wed Jun 23, 2010 6:07 pm Post subject:

What they said...

Lines
Pre-pump filter if fitted
Pump (& internal filter)

and then your worse nightmare (actually it was mine)... tank failing to breathe.
_________________
The advice you receive on here is worth the paper it's written on.
Your experiences are worth shed loads to others, including the f'ups - live and learn.
Wouldn't YOU rather learn by someone else's mistakes? So would they.

'78 Bay, 2 litre 091 box, EJ20 NA & the ashtray's on the 'right' side.
I don't lean forward for hills any more Grin

Bugger, missed out on "Live fast, die young"

illzlee · Posted: Wed Jun 23, 2010 8:58 pm Post subject:

my panel is running 70mm avo springs - you need to take all of the bumpstop ribs off. mine doesn't bounce at all running this setup with bilstein b4 shocks. Hello

oh, and good taste with the mods on the T25 - almost as good as mine Wink

_________________
'79 Bay running citroen 1.9td and phat tyres!

paulvandenton · Posted: Thu Jun 24, 2010 8:03 am Post subject:

hahaha for a minute i actually thought that WAS my van!

im gonna change up the look im afraid, ive got some porsche 928 wheels to go on when i can afford some tyres.

elusive, how did you know your tank wasnt breathing? did it swell up or something?