Help! Rb25De Problem

[Richard.W]

Help! I have purchased an R32 GTS25 and am experiencing some engine problems. These problems include; occasional missing, occasional stalling and the occasional hesitation (by which I mean when I am accelerating the engine almost hiccups, it cuts out then comes back in accelerating). I have taken it to the local Nissan Dealership who originally diagnosed it as a faulty CAS. So I got that replaced and it didn't do too much, just made these problems occur less. However they still do occur... So I took it back they performed another diagnostic check and the DTC came back OK....

How do I fix these problems!! They suggested coils (which I replaced with "newer" 2nd ones 2 months ago), Igniter, AFM or the ECU?? Which would be the best plan of attack? Or is there something they missed??

Cheers Rich

[Richard.W]

If it also helps I have put new iridium spark plugs in at the same time as the coils

[starwarz]

bad fuel filter (clogged) or plugged catalytic converter , ignition timing....ETC take it to a proper mechanic not those dealership people.

[mad082]

did the coils make any difference at all? there is always the chance that they were no better than the ones you replaced. the ignitor is also worth looking at (if it is a serious 1 r33)

if possible, if you have a mate that also has a r33 you could try swapping parts with his car and seeing if you can isolate the problem part

[Richard.W]

No cat converter so thats unlikely haha, and no I also replaced the fuel filter about 2 months ago aswell so again unlikely

Yes the coils made a slight difference but I mean it wasn't like it was a game changer as the problem is still there. No, no mate that I could swap parts with, but will look into the igniter as yes it is a series 1 RB25de

[iseekool]

Check for vacum leaks and possibly throttle position sensor.

[Richard.W]

Thanks really appreciate it! Will check this weekend!

[iseekool]

Also a leaky brake booster (causes excessive vacum leaks) can cause these issues too

[Richard.W]

Would a leaky brake booster cause any other symptoms though? Hmm so much to think about.. Bugger haha

[iseekool]

Would a leaky brake booster cause any other symptoms though? Hmm so much to think about.. Bugger haha

Yeh. Causes random hesitation and idle issues due to leaning out/bad mixtures.

[-Jimmy-]

Please check the AFM. I was getting the exact same symptoms on my RB25DE.

[meatsak1254]

iv got a very similar problem wiv my rb30 iv replaced all the same shit including distributor cap and rotor , leads n AFM and the power transistor next 2 the distributor. some1 has mentioned problems with the actual throttle body not sure though. when it plays up can u smell unburnt fuel?? mine stinks of it wen it stars randomly running like shit

[Richard.W]

If I do (most probably) end up replacing my AFM what would be the best replacement? As am browsing through trademe and to me they are all the same thing just different colours

[Richard.W]

And no can't smell any unburnt fuel sorry!

[jhjones]

If I do (most probably) end up replacing my AFM what would be the best replacement? As am browsing through trademe and to me they are all the same thing just different colours

As long as it's green sticker it should be the same. Double check the part number on yours matches the one your buying. 22680-02U00-?

http://www.skylinesaustralia.com/forums/topic/113284-fixing-your-rb26-afms/

[Richard.W]

UPDATE:

Now my car doesn't start at all It turns over but doesn't want to start, so I replaced my ignitor and resoldered the joints on my AFM (to try solve the original problem) but nothing changed, it still turns over with no motivation to start. Will be taking it into an auto electrician tomorrow hopefully.

[Richard.W]

Turns out my fuel pump packed a sad, will be getting my car back tomorrow, hopefully trouble free!

Edited September 4, 2012 by Richard.W