EA82T lurching

julian · Post by **julian** » Tue Jan 16, 2007 3:17 pm

Hey all,
Under any significant load (upwards of 1/2 or 2/3 throttle) around 2500-3500rpm the EA82T lurches violently enough to make me back off the throttle.
Most noticeable in second gear but will do it in others if you give it some.

Car is subject to pretty docile driving and runs 95-98 octane at ALL times, but hasn't had a service for a while.

I have only had the car for ~7000km so not very familiar with this motor but is there anything that I can check before it gets serviced?

Cheers

Subafury · Post by **Subafury** » Tue Jan 16, 2007 4:53 pm

i believe thats the turbo kicking in

i wish mine kicked in violently like that

na sorry mate i dunno.

Post by **Alex** » Tue Jan 16, 2007 6:15 pm

my carby is doing the same....its lurching then blowing a tad of smoke..only when i really nail it...

alex

julian · Post by **julian** » Tue Jan 16, 2007 6:41 pm

No smoke for mine...

fredsub · Post by **fredsub** » Wed Jan 17, 2007 6:48 am

lurching....this could also be fast pulses of deceleration, ie what i mean is theres instance of normal fuel curve flow, and then momentarily much less. So any of say fuel pressure (regulator?,fuel pump?) or ignition missing....or maybe a sensor giving erratic readings (maybe the TPS).

steve_rising_sun · Post by **steve_rising_sun** » Wed Jan 17, 2007 7:24 am

Sounds like its over boosting and hitting the cut out
Steve

julian · Post by **julian** » Wed Jan 17, 2007 3:20 pm

Nah, boost doesnt go above an indicated 8psi on my gauge...

Wasn't doing it today so maybe i will just get it serviced and see how it fares.

wrx_nut · Post by **wrx_nut** » Wed Jan 17, 2007 5:38 pm

when my turbo decided it woulnt work anymore and make a griding noise and leak oil it was overboosting and when it hit 9psi it cut out the fuel....
2nd hand turbo in now 7psi no fuel cut

schultzie · Post by **schultzie** » Wed Jan 17, 2007 7:35 pm

Plugs... put new plugs in and gap them to .8

does what your feeling feel like a shudder or like the car is stabbing... if so that was my problem and it was the plugs (mine was also backfiring but only after installing the WAIC)

hopefully this helps

getsideways · Post by **getsideways** » Thu Jan 18, 2007 12:50 pm

I'm having the same problem with my car... when the boost builds it seems to max out and whole car hesitates....then picks up again... then hesitates... i was thinking that the wastegate might be stuck and the boost keeps building until the fuel cuts off. maybe that could be the problem .... also whenever the turbo kicks in i can hear a clanking/grinding noise.. i'm assuming since it only happens when the boost comes on it is turbo related... maybe i need to start looking for a second hand turbo from the junkyard??

julian · Post by **julian** » Thu Jan 18, 2007 5:49 pm

Since I refilled the tank the problem seems to have gone away. Would crap fuel account for this issue?

TW83 · Post by **TW83** » Thu Jan 18, 2007 10:24 pm

I doubt it, but it sounds like it may be a fuel issue. Not sure if EA82T's are EFI but could be a surge problem if you had a close to empty tank. My EFI ford escort had a similar sounding problem under full throttle. It was a combinaton of surge and a malfunctioning EFI pump. Not sure of the fuel system for EA82T so cant be of more help sorry.

BlackMale · Post by **BlackMale** » Fri Jan 19, 2007 9:39 am

This does sound like a fuel issue, some crap in the tank may have contributed to the problem, although see how she goes - hope you changed the fuel filter though.

getsideways · Post by **getsideways** » Fri Jan 19, 2007 10:41 am

yah i'm thinking fuel filter, a full tank of premium and some fuel system treatment will solve the problem. the car that i bought was sitting for a while before i bought it... i just got it running a few days ago.. as far as i know it was sitting for many months...

wrx_nut · Post by **wrx_nut** » Sun Apr 01, 2007 7:54 pm

did some beach work on the weekend in the ea82t and after a bit of work in the ruts and some boost it went weird on me... sounded like it was running on 3 cylenders, ran very rich, boosted extremely fast and had more than nomal intake noise (very loud flutter)... off boost ran ok then on boost was like it was running rich.... radiator coolant was bubbling hot and coming back through the resivor but gauge was fine on the normal temp.... let it cool off and checked leads, turbo, oil and water was all fine... coasted it back into town and let it cool down... then drove it again and it came good....

any idea's? oxygen sensor? some sort of sensor playing up...?
quite bad fuel economy aswell.... looked at the computer (3 plug type) and it had a constant light on it (not flashing at all!)

started it up today and when it came on boost blew alot of petrol smoke

can you help me diagnose it?

cheers

Subafury · Post by **Subafury** » Sun Apr 01, 2007 8:37 pm

so is it not stuttering/lurching anymore?

wrx_nut · Post by **wrx_nut** » Sun Apr 01, 2007 8:45 pm

it never was untill this happend...now its not doing it but you can tell (petrol smoke on idle) that its running a bit rich....

schultzie · Post by **schultzie** » Sun Apr 01, 2007 9:17 pm

well if you are after another setup if your motor is dead im selling my l series

(yes i know im hijacking the thread)

but im in melb and my setup is still running extreemely well

wrx_nut · Post by **wrx_nut** » Sun Apr 01, 2007 10:34 pm

motor isnt dead try ur luck some other time haha

Subafury · Post by **Subafury** » Mon Apr 02, 2007 12:09 am

hmm when u said there was more intake noise/ fast boost/ 3 cylinders- im thinking maybe theres a leak in the intercooler or air tubes letting boost escape. but if it came good again maybe not. havent got any other ideas.

but if its any consolation my 82t was playin up the other night too when i tried racing this red haired fellow in his commonwhore (from ausubaru

)- boost/fuel momentarily kept cutting out a little when i had the right foot planted.