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#1
02-09-2011, 03:38 PM
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Fuel Pressure Regulator Part Numbers
I was wondering if anyone knew teh difference between the various fuel pressure regulators.
I have one for m103 engines and I tried to use it on a m117 and the car wouldnt stay running. Obviously its the wrong part, but I was wondering what the difference between the m103 and the m117 version FPRs is.. The FPR on my buddys 560SEL, you can feel air/vapor flowing out the back of it (where the nipple is)..its not a liquid coming out. So we swapped the one from the m103 in and no longer had that characteristic but the car woudln't stay running.. Just looking for some info.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k 
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#2
02-09-2011, 03:54 PM
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Pressure regulation is the difference.
The 1986-91 M117 engines run at 6.2-6.4 bar, and the M103 runs at 5.2-5.6 Bar.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
02-09-2011, 04:11 PM
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I wasn't able to find the pn for the fpr in the epc so, I couldnt see what other models carried the same fpr. Would a 84 or so 500SEL be a candidate?
Thanks for the info. Good stuff to know.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#4
02-09-2011, 05:15 PM
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Pre 1986 cars use a different system that has the regulator in the fuel distributor.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#5
02-09-2011, 05:29 PM
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Ah alright so is this a m117 only part of does the m116 share the same?
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#6
02-10-2011, 08:15 AM
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Yes, 4.2L & 5.6L use the same part.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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