93_Clubman wrote:speed freak wrote:Do local auto part stores sell them?
Some of the bigger ones might, but last time I heard a price quote for a new one from Mazda was $150 in 2007.
On cold start what should the idle be? Usually after the base idle is set again cold start will idle at 1500 rpm then drop to about 900 rpm when warm. Now cold start is about 1100 rpm and warm is 800 rpm or so. I was getting idle dip on cold startup too, it would fire and rev up to about 2000 rpm drop to about 1000 rpm then back up to around 1100/1200 rpm for cold start. I cleaned the TB and IAC valve again yesterday (I seem to get a lot of blowby, oil sitting in the TB and intake manifold) now no more idle dip. Start the car this morning, revs up to 2000 rpm and drop to about 1200 rpm.
NA8 here, so from memory not exactly sure what the cold idle speed should be for the NB8B, however there should be a black & white sticker on the inside of the bonnet, which details normal operating temperature idle etc, & might include cold idle, although 1500 RPM sounds close. Normal operating temp idle for NA8 is 850 RPM +/- 50 RPM, so 800-900 RPM.
When the air con is on and lights on etc is that when the IAC valve is working? If so since the 1500 rpm rough spot goes away with air con on does that mean IAC valve works properly? If the base idle is out could that cause starting issues? It seems heat related the cranking but not firing after its been dríven but Iv replaced both cam and crank position sensors, unless that's the EGI relay causing this. Then there is the slow cranking on cold start and just firing up.
My NA6 & NA8s have had no air con or power steering, so I've not delved into what various affects they have. However, as you've advised it's been to Automotive Plus a few times to set base idle - I think it's unusual that base idle has had to be repeatedly set, which to me suggests something else is faulting or going out of adjustment, which subsequently requires base idle to be reset.
Also I looked at my battery and its all black but I couldn't see Panasonic on it anywhere. Didn't take it out though so might be on the side of the battery?
I'm not currently running a Panasonic so can't check, but from memory Panasonic is on it somewhere. That said it sounds like it, especially if it's also got the breather pipes attached at the top of each end.
Cheers mate! $150 is a bit rich lol ebay it is I think for the relay. Automotive Plus are aware of it obviously but they just say now that NB8B's do weird things every so often and they cant find a solution to anything, they just keep adjusting/re setting the base idle every time it gets the rough spot. Although there not aware of the starting problems yet so when they re open Ill be getting in contact with them to see if they can figure it out. I agree though the base idle shouldn't need to be adjusted too often. Ill have a look under the bonnet for the info sticker.
Is the PCV valve usually the culprit for excessive blowby? I assume its not good that there is oil pooling in the TB haha?
