Dear all, I need your help ! My 348 has some problem to start when the engine is hot.... It is a common issue on the 348. I received a lot of information from a fantastic guy ! He is well known here, his name is Ernie! Once again, dear Ernie, I thank you very much for your help. After discussion, I decided to restore the fuel circuit ( pump seals, injectors and fuel regulators). Grandma is 29 years old! I want to buy 2 fuel regulators, NAPA CRB 219624. I found them on the NAPA online site, but They don't send the parts ! May I ask someone of you to buy it for me and send it to me in Luxembourg? Of course, I shall pay all in advance! Here, in Luxembourg, we have 70th Ferrari festivity on July 16th, and I want ot participate with my car. It should be nice to receive the parts 1 or 2 weeks before. If you can help me, please contact me by PM. Have a nice evening Marc
Based on my recent struggles, this part seems to be unobtanium. After scouting the planet I was able to find on guy in NJ who had only one left in stock, and I bought it. Would love to know if anyone found a supplier who has these in stock.
Does not look like the one for the 355, which has mounting tabs. But, does it have the same regulation ratings?
I think it fits a Jag, Saab and couple other cars. It may have a slightly different mount tab and return line fitting which is an easy fix due to no real pressure in it I forgot I think they are m12 and m14 fittings on them so anything 3.8 bar will work. I'll have to check mine later
I would pass on the stock replacement and go for the aftermarket for adjustable regulators. Better control, possibly more tunable and more power.
No I dont but just looked M14 and M16 threads on the FPR Yuuup !!!!! much more better Image Unavailable, Please Login
For anyone who's interested, here's the thread with Tim's aftermarket solution: http://www.ferrarichat.com/forum/348-355-sponsored-bradan/541563-348-air-fuel-adjustment.html
I went through this whole exercise in early May. It appears that all suppliers source from Standard: There are "new" regulators on my 92 tb, and they look like the Beck/Arnley 158-0319 for Jaguar. Not sure what the Bar rating is (very early 348s had 3.0, later need or should have 3.8). http://www.ferrarichat.com/forum/145353667-post31.html
The FPR is identical to the Volvo one. You can probably get it locally or, for example, at Volvo/ Ferrari Fuel Pressure Regulator Bosch 0280160731 | eBay Image Unavailable, Please Login
Just realised, your 348 appears to be very early. The FPR-s were as follows: 348, Mondial (->10/90) 0 280 160 715 137960 348 (Volvo) (11/90->) 0 280 160 731 147281 If your 348 is earlier than 10/90, then it would be this one Fuel Injection Pressure Regulator AIRTEX fits 90-91 Ferrari Mondial t 3.4L-V8 | eBay or you can get Bosch here https://www.autoteiledirekt.de/bosch-677389.html or (cheaper) here https://www.carondo.com/en/control-valve-fuel-pressure:::1739469.html. The early (715, p/n 137960) is 3.8 Bar and later (731, p/n 147281) is 3.0 bar.
Looks like I had wrong info about the pressure of the early FPR 0 280 160 715 (p/n 137960). It seems that it is also 3.0 Bar, like the later 0 280 160 731 (p/n 147281). I have read somewhere on this forum that the threads are different between the two FPR-s. I don't know about the early one (715) but the later 731 has 14 mm on the side connection and 16 mm at the bottom (for mounting).
I just put 2 new standard motor pr298 3.8bar on my 93 348. Here's link where I got them https://autoplicity.com/3574839-standard-motor-products-pr298-fuel-injection-pressure-regulator?gclid=CJ750oeyodQCFddKDQodhNAKtQ Sent from my SM-G930P using Tapatalk
Is there a real alternative available for the 355 (5.2)? As the Bosch Original is also very, very hard to find. I ordered 2 in Latvia (of all places), but got refunded as they did not really have them...and the standard motor part was also out of order where I looked... But surely there must be an alternative available in Europe somewhere?
Does the engine run fine with these? I think the higher pressure just makes the mixture richer causing the O2 sensors to work "harder" to keep the AFR normal. Perhaps the ECU-s also learn that they have to shorten the duration of the injector pulses to maintain correct AFR. If this is so, there would be no benefit from higher fuel pressure, just additional strain on the fuel pumps and lines.
Yep. Mine had the 3.8 on them anyhow. Perhaps because it's a speciale. But my understanding was 93 and newer used the 3.8. Sent from my SM-G930P using Tapatalk
I run up to 70 psi rail pressure at times Our ECUs are not that smart and cant correct fast at all,Parameters are quite limited also thats the reason for the 10 min "learn" process. they are 1 small step above a carburetor. I maxed out the ecu's cpu LOL I am going aftermarket this season
Question for the Ferrari/Porsche Pros, would this regulator (BOSCH 0 280 160 297) work for the 348? Of course, the threads and port diameters should be the same. It's rated at 3.5 Bar, and just cap off one of the side ports (maybe with a small fuel pressure gage). The diagram is from a mid 90's Porsche. . Image Unavailable, Please Login Image Unavailable, Please Login
It would work fine if you swap the "FUEL RETURN" and "FUEL SUPPLY". Interesting arrangement to eaven out small differences between the FPR-s.
The FPR in your picture, and on eBay, matches the drawing in the 348 Workshop Manual. However, the fuel pressure at idle specs are the same throughout the model range e.g. from the Technical Manuals (aka Owner's Manuals); 1989, 1991 and 1993 Spider. . Image Unavailable, Please Login Image Unavailable, Please Login
But the parts book clearly shows two different types. The early one has a clamp-on hose for the fuel return line while the later has the hard line (AN fitting). . Image Unavailable, Please Login
