Here’s a few quick pics of her on the Fb group - https://www.facebook.com/groups/10181680435/permalink/10165514096880436/
Can you just warm up the engine driving around and when the problem appears pull over and check suspected solenoids visually to see if they open the pods or not? An under bonnet camera would be good.Next little gremlin...
Once the engine gets warm, the little black pod diaphragms that open the inlet butterflies aren't moving and I'm getting the 3-4Krpm flat spot, so my guess is the solenoid doesn't like heat, or something else is at play RE vacuum, or ECU, or voltage, so open to suggestions. The weird thing is it's mounted on the firewall and not the head, so it should be cooler than usual.
The pods work when cold, and the car pulls well. I'm planning on taking the solenoid off when it's warm and testing with a battery to see if the valve opens. I'm not sure if you can refurb it because it looks pretty well sealed from first impressions - will see.
Any thoughts?
Yeah I’ve driven it around and done that and the pods don’t move when it’s hot (and running). I can test it visually by moving the throttle in the engine bay and seeing nothing happen. The solenoid let’s vacuum into the tubes going to the pods thus sucking the diaphragms inside which moves the butterflies in the inlet. It’s weird engineering haha.Can you just warm up the engine driving around and when the problem appears pull over and check suspected solenoids visually to see if they open the pods or not? An under bonnet camera would be good.
Yeah you’re right - the hoses get hard and the plastic gets brittle - I’ve learned never to attempt to pull them off the pods because you’ll likely snap the spigot. Only remove them at the little t junction. In this case though that stuff isn’t a factor. The pods are fine and work as they should when the car is below 90c - they are sealed and I’ve inspected and reinforced them. It’s something else. I’ll have some time tomorrow night to investigate further.What I found on the Mi16 when it had this problem was that the plastic spigot on the pods was sheared flush at the base under the connecting hose but it was still hanging on in place, so difficult to see. NLA, so I inserted a length of brass tube through the spigot and into the pod just enough that it would stay, a gentle press fit and then siliconed around the outside. Worked fine after that. I think those connecting hoses get hard in time and start to put some strain on the spigot and eventually fatigue them.
Perhaps I worded it the wrong way; but that's what I meant. The full intake is open at idle, immediately actuates at ~1k, then returns to full open at ~4k and above. But if the solenoid was bypassed, and vacuum was allowed to constantly affect the pods, the intake would never return to full open. I feel like I'm just preaching to the choir, so I'll back to reading!!The solenoid is actually open on the short manifold at idle and instantly closes to the long manifold as soon as its off idle and reopens at 5000rpm. You can actually really feel/hear it ipen with the engine mods/chip you have just completed.
What do you mean?I will be sending your S16 plastics next week once back in Brissie!
Heheh thanks guys. Looks like the solenoid is up the duff, and my spare in 6 hrs drive away... anyone have one? They’re impossible to refurbish. You can’t really even get into it without destroying it.Perhaps I worded it the wrong way; but that's what I meant. The full intake is open at idle, immediately actuates at ~1k, then returns to full open at ~4k and above. But if the solenoid was bypassed, and vacuum was allowed to constantly affect the pods, the intake would never return to full open. I feel like I'm just preaching to the choir, so I'll back to reading!!
I can get it to click/open maybe once every five minutes off the car with a battery and some alligator clips. Once it clicks it won’t open again despite how many times I prod the terminal with power! Don’t know what that means but I know the touch the throttle more than once every five minutes when driving hahah.Heheh thanks guys. Looks like the solenoid is up the duff, and my spare in 6 hrs drive away... anyone have one? They’re impossible to refurbish. You can’t really even get into it without destroying it.
Sweet! I didn’t know if that was still going down. Mighty stuff.I ordered the S16 covers before going on leave
Check this gang. It explains it well.Perhaps I worded it the wrong way; but that's what I meant. The full intake is open at idle, immediately actuates at ~1k, then returns to full open at ~4k and above. But if the solenoid was bypassed, and vacuum was allowed to constantly affect the pods, the intake would never return to full open. I feel like I'm just preaching to the choir, so I'll back to reading!!