Where Can I Find a Warm-Up Regulator?

I don't have the part number, but when I had mine changed out a few years ago, my mechanic told me it was a standard Bosch part, and he thought it was common to Mercedes.

 

Found 1 online

http://specialtauto.com/warm-up-regulators.html

 

Who was that guy who switched to carbs? He might have a spare WUR.

 

okay guys, i have the BOSCH book and the PN# for the WUR is 0 438 140 083. it's a very very hard one to find and can be quiet expensive. Mercedes did not use this WUR. the one reason it's easy to boost the CIS engine management in the ferraris is due to the WUR, it's both vaccum and boost regulating along with an altitude adjustment via an atmospheric chamber.

there is no cross reference for it, couple reasons. the WUR is specific to the engine and how it should run since this is what controls the fuel pressure. most other WURs' are not setup for boost. the closest you'll get is the turbo porsche WURs' and those are still not calibrated for the 308/328 engine.

best bet is getting a rebuild, larry (CIS rebuilder) knows a guy that does that.

 

bottom line is this, the WUR is calibrated to the engine it is regulating, while a mercedes or prosche unit will mount and fit it wont be correctly adjusting the fuel. so the car won't run as it should. i have the maps from the BOSCH book on the WURs and they are all different.

 

Does it cross with the 308QV?

I've had mine (I swapped to EFI) sitting in a box in my garage for the past 4 years. I planned on selling all the CIS stuff off this winter, but PM me if I can be of help.

 

all 308/328 use the same WUR

 

Here is a photo of my Bosch WUR part #132 for an 85' 308qv I've heard that 2 different part numbers can be found on them and that you can use either. (083 may be the other number) .
(I thought I might try to find a used one that isn't needed (or bad) so that I could open it up to see if I could rebuild them at a vastly reduced cost).
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Hi Augustine,

About 18mo ago I bought one of 3 the Bosch distributor in Chicago still had on the shelf. Purchased # 0 438 140 132 (for 1988.5 328) through NAPA (they're a Bosch authorized reseller) for $424. Unfortunately the Bosch guy (Mike as I recall) told me there were no superceding part numbers at the time. When I called around I found a few for $6-700 available through Ferrari parts retailers.

Larry Fletcher (here on FC) is the Bosch rebuild guru, and he reccomended the Special-T Auto folks in a previous thread.

Sorry I can't be more encouraging. Perhaps NAPA can run a nationwide search to see what's in the warehouses (although my store had to call Bosch directly).

Best,

Carl

 

Augustine, if you'd like to borrow my spare for testing I'm happy to send to you.

Carl

 

Hi Augustine,

Not too difficult - the FI test procedure is on the CD I sent. I also have the CIS test gauge set.

First, before you open the fuel system, what symptoms are you experiencing? The WUR really only affects cold & warm control pressure (with throttle enrichment via vacuum hose on the 328).

Carl

 

So it looks like this thread has petered out. FWIW, there is an auxilary air valve on the Porsche 911 that closes as the engine warms up. This valve kinda by-passes the throttle plate and increases the idle speed. There is 12 volts going to it and you can watch the disc rotate over the opening as it heats up. Easy to check on the bench. My experences with WUR is that it controls fuel pressure on heat-up. YMMV

Jeff Pintler
89 348tb, 86 TR

 

I went to the local Bosch dealer yesterday to get my new injectors and thermo time switch. They told me the correct reference for the warm-up regulator would be 0 438 140 116, but it is no longer manufactured. If you do find some place that still has them, please let me know. The Bosch dealer told me to get it from Ferrari ....

Rui
88' 328 GTS

 

Like Karl said, "Larry Fletcher (here on FC) is the Bosch rebuild guru, and he reccomended the Special-T Auto folks in a previous thread. " Larry is a great guy and i think he is trying to get new ones made. You can contact Larry at .... fletch62 AT bellsouth DOT net ... He is a great guy and EXTREMELY knowledgeable and helpful.

 

Jeff, do you know if the Porsche AAV is the same as the 328?
perhaps part number?

 

I'd agree that all standard (euro) injected 308 & 328 could use the same warm-up regulator (because they have the same injection/intake system: K-Jet without Lambda without cold start air valve), but logic (and the F part numbers) indicate that each "family" has its own unique warm-up regulator based on the overall injection/intake system:

Family 1
K-Jet without Lambda without cold start air valve
standard 308i, standard 308QV, and standard 328
F PN 119825 -- replaces 118585 (although the SPC for the standard 308i lists 113973)

Family 2
K-Jet without Lambda with cold start air valve
1980-1982 US 308i and 1983 US 308QV
F PN 115473

Family 3
K-Jet with Lambda without cold start air valve
1984-1985 US 308QV and 1986-1989 US 328
F PN 121743

I'd bet a lot of injected 308/328 have had the wrong warm-up regulator installed (and are probably working OKish), but if people could post which "family" 308/328 they have and the Bosch 10 digit PN from the warm-up regulator that would be the best data IMO.

And this also would indicate that someone who has gone from Family 2 to Family 1 (by disabling the cold start air valve) should really change warm-up regulator too.

 

my 85' 308qv US ver- has a Bosch 132 installed. (I don't know if it's original-or correct)
Family3

 

good point Steve,
now i wonder how many 'rebuilders' know this. as Bosch doesn't really diffrienciate between them. they are built to 'Ferrari's' specs for that particular engine and management. any info from ferrari on the WUR differences?

 

Augustine:

My experience with the FI is limited, but my car has the same problem and I doubt your problem is with the WUR. It is my recommendation that you do some trouble shooting to isolate the problem before buying those expensive parts. It is my understanding that the fast idle system really does not start to work until under 60Deg F. In So Cal, it is rare for me to find my coolant temp below 60 Deg. So in my case the car while sitting in the garage does not provide a lot of opportunity to test things at a low enough temperature.

In trying to diagnose the problem and have done some testing on mine and I even replaced the AAV (which controls the idle speed) When I checked my fuel pressures; the WUR seemed to be working fine—the pressures are within range and the system responds to a vacuum.

There are some electrical circuits that have an indirect affect on the fast idle system too; I would recommend that first run a fuel pressure test to help isolate the WUR and then you run the test procedure in the 328 Service Bulletin 80-29 to make sure the electrical stuff is in order (make sure you mark the diode before you remove it. The service bulletins are available free on http://ferrari.cdyn.com/ferrari_docs/328_bulletins.pdf and Carl’s CIS test procedure is located there too http://ferrari.cdyn.com/

I would really appreciate if you would keep us posted on what you may find.

Merry Christmas,
Mark