stuttering on accelleration and otherthings

[cefiro_drifta]

i just got myself a stupidly clean 320i M20 E30

couple of things i need answering so i thought this is the best place

it drives bloody nicly but when i accelerate slowly it starts to stutter slightly but if i floor it it doesnt ? the previous owner told me that the fuel pump gave in last month and when he called the RAC guy out h said all the rac did was ta the fuel tank wiht a rubber mallet and it started no problem s, he sad he has dont this a couple fo times in the last month and its always started ...... any clues ??

also the gear stick has huge amounts of play and if im in 5th and low revs and accelerate i hear a thumping bass like sound and growling noise .. si that gearbox or maybe something else ??? only does it in 5th and in low revs

thanks very much

[murran]

does it do what mine does? (read my thread; running like a bag of sh1t. just above this.)

[abelai]

I think you might need to deal with the fuel pump issue first then tackle any other problems you might still have.

[cefiro_drifta]

does it do what mine does? (read my thread; running like a bag of sh1t. just above this.)

na mines nto doin wat yours is doin

mine idles fine and doesnt hunt but low down and light acceleration it stutters but not badly , no misfire just stutters a lil


now and again it wont start so i have to bash the underneith of the petrol tank and it starts fine after that

[cefiro_drifta]

I think you might need to deal with the fuel pump issue first then tackle any other problems you might still have.

well im not sure if it is th fuel pump as thye usually work or not frm my previous experience

just wanted to see if anyone else has had similar problems and how they cured them

[Brianmoooore]

Almost definitely the fuel pump is dying. It'll respond to bashing for a week or so, but eventually will leave you stranded somewhere!
The stuttering could be a number of things, but first check the big air hose between the air filter/meter and throttle body for splits and cracks.

[cefiro_drifta]

thanks Brianmooooooooooooore

i'll try the nissan one in there and if not then i might have a 325i one lined up .. if the stuttering isnt cleared then i'll check wat u said then start eliminating things like leads, plugs, dizzy etc etc and go form there

thanks for your help people

[Brianmoooore]

I doubt if the stuttering is anything to do with the fuel pump.
There might not even be just one cause for this, as the M20B20 runs fairly lean as standard, only just short of stuttering as normal.

[cefiro_drifta]

thanks again ... i had a quick look at the hoses and didnt see any cracks, it was dark tho, but im getting an induction kit very very soon so will pull it all off and have a proper inspection .. if they run fairly lean i might look in to some bigger injectors to over come that ... maybe from a 325 or even 535 if they fit

[E30BeemerLad]

are the plugs, dizzy cap & arm looking in OK condition?

If it's a 320 I wouldn't bother with all the bigger injector malarky etc, fit a 325 throttle body and inlet plenum first. Also a chip from Ant may well get rid of flat spots

[ajm-e30]

i had the same problem untill yesterday with stuttering under accel, i started it last night to find the coil was arcing on the chassis

[cefiro_drifta]

yeah they look all ok but i havent opened the cap up to check the contacts, might give that a good clean and see.. the 325 pelmun and chip sounds expensive haha im kinda hoping to keep things in the " pocket change " range but thanks for the advice , if the cheap ways dont fix the problems then i will look in to chipping it and doin a bit on the engine

ajm- hmmm i shall also look in to that to see if i can spot an arch or something ... but it only does it if im plodding along , if i floor it its all ok so im thinking def a fuel prob

[Brianmoooore]

thanks again ... i had a quick look at the hoses and didnt see any cracks, it was dark tho, but im getting an induction kit very very soon so will pull it all off and have a proper inspection .. if they run fairly lean i might look in to some bigger injectors to over come that ... maybe from a 325 or even 535 if they fit

The induction kit will probably lose power for you and is unlikely to help with your problem
Fitting incorrect injectors will mess it right up unless the electronics are remapped to go with them.
There are many possible causes for your problem, and they are all related to OE parts being out of spec. Fitting aftermarket/incorrect parts is not the way to solve your problems.
A good analysis of the problem, investigative fault finding, and the replacement/repair of faulty parts, is.
Even if you intend to tune your car, the first step is to get it into perfect running order in OE form.

[Brianmoooore]

yeah they look all ok but i havent opened the cap up to check the contacts,

!!! You can't check a distributor cap and rotor arm from the outside.

[ajm-e30]

well mine had the exact same problem mate and now its solved it drives much better

[cefiro_drifta]

yeah they look all ok but i havent opened the cap up to check the contacts,

!!! You can't check a distributor cap and rotor arm from the outside.

wat i ment was they look fairly clean and new clean so had a feeling they have been changed