I have a mechanical fuel pressure regulator on my vw bus that was used w/ the stock EFI. Is there any reason to still use this device? It uses manifold vacuum to lower the fuel pressure at idle. Is there any reason the MS can't just be set to inject less? Right now my VE table values are around 67% for idle which yields a slightly above stoich mixture...
Thoughts?
Mike
fuel pressure regulator - is it needed?
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
the fuel pressure regulator uses the "vacuum" hose to keep the pressure difference betweent the inside of the manifold and the inside of the fuel rail constant. this is what allows for the accurate prediction of the duration of injection to get the right mixture.
So, yes, you do need a regulator.
So, yes, you do need a regulator.
Don't Talk About It, JUST DO IT!
'93 Toyota P/U 22RE V3.0 MS2/Extra 3.1.2 Full Sequential Spark and Injection
'93 Toyota P/U 22RE V3.0 MS2/Extra 3.1.2 Full Sequential Spark and Injection
Edit: I got my regulator threads mixed up but this sort of fits here also....
I read on some other site that there is aftermarket EFI system(s) out now that use PWM control of the fuel pump to eliminate the need for a bypass regulator. I was unable to find any details but it would seem logical.
I read on some other site that there is aftermarket EFI system(s) out now that use PWM control of the fuel pump to eliminate the need for a bypass regulator. I was unable to find any details but it would seem logical.
73 Cadillac Eldorado convert Fairly stock 8.5:1 500cuin/8.2L
MSIIV3,2.88,relay board, LC-1,Older Holley 670cfm 2bbl TBI w/85lbhr injectors.
MSIIV3,2.88,relay board, LC-1,Older Holley 670cfm 2bbl TBI w/85lbhr injectors.