Rough idle....

[jambo_gtir]

Hi guys,

Got a jerky idle and at low rpm and gentle acceleration the engine jerks a bit.
Allignition parts are brand new; Dizzy, HT leads, Plugs (gapped properly) and I have set base timing correctly with Nissan Datascan software.
I have checked all sensors and they are fine also.
I'm thinking it must be a funny injector as when i open it up and get the injectors flowing it's fine.
Has anyone else had this before? Just want to see if someone else has had a leaky injector before and has had same issues as me?
Cheers.

 

[Gaz gtiR]

i had the exactlt the same problem! did my head in for weeks! changed all ignition parts & had injeectors cleaned. made no differance! I went & had it mapped about a month after owning it @ fusion. When Ed opend the ecu to put a NISTUNE daughterbourd in we found it had had already been chipped over in japan before the car was imported! & japan have higher octane fuels than the uk! so it ran like a bag of poo on low revs with our fuel untill it was remapped! so if you have not had it mapped check you havent got the same problem!

 

[danr]

mine panted like an asthmatic pit bull before map (264 cams though a quite lopey). but i also had a plug missing off 1 of the 4 throttle body breathers. give them a looksy!

 

[jambo_gtir]

Cheers guys for your responses. I might put my mines ecu back in today and see if that helps, its really anoying trying to drive at 30 as it jerks around

 

[jambo_gtir]

well, I put the Mines in and still it's crap on idle It has improved slightly whilst driving though.
I read on here a while ago about running acetone through the injectors to clean them, is this still something you guys do?

Cheers.