Misfiring!

[Josh_Clio14]

clio 1.4 8v alize, 1999

cars been misfiring around (and only around) 2000rpm when accelerating, checked the plugs, looked fine, cleaned em up anyway, leads seem okay, still misfiring, anything else i can check myself before i condemn it to a garage?

thanks in advance for any ideas/advice

 

[Josh_Clio14]

no ideas?

 

[Scadden182]

crank sensor? Dirty injectors?

 

[James23]

I'd go for dirty injectors or a dirty fuel filter, change the fuel filter and use a few tanks of v-power and maybe some injector cleaner.
May as well give your TB a clean too, dirty TB's can cause a few problems.

 

[Josh_Clio14]

Right I'll get on that as soon as I've got a spare second and let you know.

I did wonder about the TB actually, I've recently had a problem with that as when I started the car it turned over and fired up but unless I gave it any throttle the revs just dropped off and the car stalled, took it to a Renault 'specialist' nearby and he said he'd cleaned out the 'idle speed control valve'. Even now on starting it over revs then under and then returns to normal, will give the whole body a clean out and see if that helps.

Thanks for the advice chaps (Y) I'll let you know how I get on

 

[Josh_Clio14]

ive just now taken off the throttle body and given it a good thorough clean, replaced everything how it was, and now when i turn the engine on its slow to reach normal idle, if it gets there at all, and if i rev the car, the revs stick at around 1.5k-2k help?

 

[Craigus]

What did you use to clean it? Sounds like it is being starved of air. How long does it hold onto the revs for? Maybe a new TB needed.

 

[Josh_Clio14]

well its a silly plastic thing so a bit of alcohol, and only a bit because the dirt came off easy. it all looks ok and seems like its working fine, sensors look good too, how much would a new throttle body set up cost me?
its not going to blow up if i run it like this is it? i need to get home lol

 

[ijaen]

What about the ignition coil?

 

[Josh_Clio14]

havnt checked the coil.. im a bit of a novice so, what would i be looking for there, or is that a case of chucking it to a garage.

have actually called my garage up and he suggested that as its been unplugged it might need to 'talk' to the computer again to sort out the idle, that sound plausible?

 

[Craigus]

I would just take it to a garage TBH.

 

[James23]

Sounds like you've either disturbed the routing of your accelerator cable so its sticking (could try squirting some wd40 or similiar down the cable) or haven't put something back properly so have a small air leak.

 

[Josh_Clio14]

Hmm maybe the cable... I think it's all back right, it's only the airbox and the breather pipe, then the throttle bodys just sat there, no bolts no nuts anything just a sort of plastic locator :S I'll have to ask the garage to have a look I think