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[Omega russ]

Does anybody know the part number or where I can get a new solenoid from?

[Diamond Black Geezer]

Not off the top of my head but as I say - swap it over, which will do two things...

1 confirm (or not) that you have faulty multirams

2 cure the problem (for free) because the SAI (Secondary Air Injection system) is considered a completely redundant system. Many, myself included, remove it completely.

 

[Omega russ]

Ok will try the 1 off there
Thanks very much for the help   

[Diamond Black Geezer]

Obviously if you're confident that the front one works well, then swapping it with that one, also it worth doing, methodically.

Just be aware that when replacing the plenum it is very easy to trap a hose, wiring loom, or even accidentally knock on o-ring, all of which can then cause a vac leak, and dodgy running. Very common accident, I've been there! 

[Webby the Bear]

check them dang vacuum boxes too (covered on a guide here somewhere). i had one not working. full power restored afterwards 

[Diamond Black Geezer]

Ahh,. Mr Webby speaks truth. I'm getting spares when I see them, these days. Same here.

The 'check' and malady should be searchable on here (plenty of people have had the issue) but it goes something like this - bonnet open, run/stop the engine, pull off the thin vac hose that goes  into the vac reservoir at the front of the engine.

(this is a rounded black box, mounted on the air intake at the front of the engine, with two tubes going into it) as below



You should hear a 'hiss' as air escapes. If you have a leak/fault non-return valve, then no hiss. I don't recall which is the one you need to be pulling off, but it'll take a maximum of two goes to find out! 

There is another vac reservoir inside the scuttle, which is harder to get to, but think about it logically and you don't pull the vac hose off the vac tank itself, but trace where they go, and pull them at the other end. If any of this has gone a bit too in-depth / technical, just say. Sounds complicated, as easy as sucking a drinking straw. 

[Omega russ]

Quick update I've got 2 solenoids to try on the multi ram this weekend see if they solve the problem

[Omega russ]

Quick update I've fitted another solenoid to the rear multi ram it seems better but still plays up now an again
Has anybody got any ideas what I could try next?

[Andy H]

Ahh,. Mr Webby speaks truth. I'm getting spares when I see them, these days. Same here.

The 'check' and malady should be searchable on here (plenty of people have had the issue) but it goes something like this - bonnet open, run/stop the engine, pull off the thin vac hose that goes  into the vac reservoir at the front of the engine.

(this is a rounded black box, mounted on the air intake at the front of the engine, with two tubes going into it) as below



You should hear a 'hiss' as air escapes. If you have a leak/fault non-return valve, then no hiss. I don't recall which is the one you need to be pulling off, but it'll take a maximum of two goes to find out! 

There is another vac reservoir inside the scuttle, which is harder to get to, but think about it logically and you don't pull the vac hose off the vac tank itself, but trace where they go, and pull them at the other end. If any of this has gone a bit too in-depth / technical, just say. Sounds complicated, as easy as sucking a drinking straw. 

My 1994 PFL only had one reservoir. My 2003 FL has two.

My 1994 PFL behaved as described and I think the problem was caused by air leaks in the heater controls. My assumption is that the second tank was added to later cars to isolate the vacuum for the multirams from the vacuum for the climate controls

[Omega russ]

I've tried both boxes an getting the hiss of air out of both
The problem is still there
Has anybody got any other things I could try?

[Omega russ]

I've tried another ecu on the car now but it's still doing the same thing
Can anyone suggest anything else I can try?

[Omega russ]

Does anybody think it Could this be injector related possibly

[Nick W]

Does anybody think it Could this be injector related possibly

No.








Go over the vacuum system again, ensuring that it's piped correctly and that there are no leaks as that is by far the most likely cause of your problem.

[Andy H]

I've tried another ecu on the car now but it's still doing the same thing
Can anyone suggest anything else I can try?

Basic maintenance really:
Check the cam belt timing
Check the air filter
Check that the throttles actually open fully when the pedal is floored

[Omega russ]

Really stuck with what to try next
Car now has a splutter underload then clears at higher revs