Hi all, Does any of You know the Bosch part nr. for this unit on the 308 QV models ? One of the cars I care for,other than a 400GT,is a 1988 Lancia Thema 8.32. As many of You know this engine is a derivative of the 308 QV engine. Sadly,in my ownership it has never run quite right and one of the problems was a non original Electro Hydraulic Actuator on the fuel metering device. From pictures online I found the Bosch nr. to be 2437020007,also used on many Mercedes. Happy to finally solve this problem I bought and installed one,but engine is still not up to spec. The reason beeing,as I've later discovered,that although Ferrari/Lancia used this specific actuator they tuned it to their spec. So,an original out-of-the-box 2437020007 will not operate correctly on this engine. So,does any of You know what type EHA is fitted on the 308 QV ?
Thank You Brian. The Lancia has a KE3 Jetronic. I thought the 308 QV used the same set up. I might be wrong.
Nope. 84-85 had K jet with Lambda Like I said, the only one I can think of are the TR's with KE and they didn't all have that.
Thanks Brian. Then it all became more complicated. Lancia will not sell the EHA as a single part,only as a complete metering device. Although Bosch sell the actuator it will not help as long as they are calibrated differently by Lancia. If Ferrari can be difficult to maintain,try a 8.32
Ferrari only sold with complete unit too. Not sure what the modifications were but possibly alter the controlling current? I would think on a chassis dyno the fuel mixture could be graphed for different RPM/load conditions and alter its function as needed. Its a pretty simple system.
You can buy a new one that's correctly calibrated from Larry at CIS flow specialties In Alabama but you can adjust yours. I needed one for my 89 Testarossa and he was the guy to see. Larry can also tell you how to calibrate yours using a meter. I've had the pleasure of working on an 8.32. Interesting that it had KE3 without lambda.
It's the late Swiss (CH88) version 328 that also has Bosch KE3-Jetronic CIS injection. I think that you have this situation backwards: KE3-Jet uses the 2437020007 EHA (this is calibrated to work over the current range of -10 mA to +10 mA -- i.e., the default "center" current value is 0 mA). KE-Jet uses the 2437020008 EHA (this is calibrated to work over the current range of 0 mA to 20 mA -- i.e., the default "center" current value is 10 mA). Consequently, when one buys the still available 2437020007, but wants to use it on a KE-Jet Ferrari = it needs to be recalibrated by Larry, but 2437020007 should be OK as-is for CH88 328 or Lancia Thema 8.32. Here's an earlier thread where another Lancia Thema 8.32 Owner indicated that a new 2437020007 worked fine as-is out-of-the-box when he replaced his leaking 2437020007: http://www.ferrarichat.com/forum/technical-q-sponsored-algar-ferrari/347019-eha-valve-bosch-cis-ke3-jetronic-injection.html If yours has/had some other type/brand of EHA installed, it may have been (mis)tweaked to compensate so it may need to have a mixture retweak when you go back to the correct EHA (or you have some other problem ).
This was very valuable information. Thanks to all of You. Yes,it probably was tweaked to suit the different EHA. It had a very lean mixture and a later style Microplex with different ignition settings for catalyst version. Microplex is changed and mixture is set to factory spec but still it suffers weak midrange performance. The EHA I use was used/tested but I should probably go for a brand new unit. My concern was that this EHA is listed to suit both 4-6-8 cylinder cars and that it might need calibrating to each engine. I'll probably contact Larry for some support or purchase. This is a great car with nice performance. Just have to sort it out a bit further. Thanks, Arvid
