I'm not sure what you mean by pinch off the outlet line?? Of the Pierburg?? I tried pinching the output/return line from the AFPR to see what happens to the FP but the car stalls.
If I need to change the in tank pump what is the thinking as to what pump to use?? Again I'm running a Pierburg for the added FP the AFPR needs so should I just use a stock pump? Larry White Knight 1991 Crystal White #99 CSP Silver Bullet 1992 Silverstone #17 SM2 FM I+ Turbo Honey B 1992 Sunburst Yellow #99 SM2L JR Supercharger Whooosh 2004 Titanium Mazdaspeed MX-5 LowCountry Miata http://www.lowcountrymiataclub.net Masters Miata RAGS 074 From: Ray Ayala [mailto:[EMAIL PROTECTED] Sent: Monday, July 21, 2008 9:52 AM To: Larry Alster; 'Miata Power List'; 'SSCOR List' Subject: Re: Fuel Pressure The tank pump will obstruct flow if it's not running. There's also a sock filter on its pickup. A quickie test for the Pierburg is to momentarily pinch off its outlet line. ----- Original Message ----- From: Larry Alster <mailto:[EMAIL PROTECTED]> To: 'Miata Power List' <mailto:[email protected]> ; 'SSCOR List' <mailto:[EMAIL PROTECTED]> Sent: Monday, July 21, 2008 6:19 AM Subject: Fuel Pressure The car 1992 1.6 engine/JR supercharger running 6 psi/Pierburg Pump/BEGI AFPR (old style) car has 150,000 miles on it and the Sebring system has been on it for about 35k. The problem is that I don't develop enough fuel pressure. Was running about 75-80 psi in the past. Now I can't get more than 65 and it doesn't hold that. No WB but the NB unit never shows the A/F going full rich anymore. Changed the fuel filter. Made sure the Pierburg is running. Could the tank pump be bad and the Pierburg isn't capable of overcoming the load of a bad tank pump?? Or could the problem just be the AFPR?? I turned the adjustment screw a little and got no real difference in the pressures. I hate to mess with the setting on it since the car was running well and the thing is a PITA to adjust. Larry White Knight 1991 Crystal White #99 CSP Silver Bullet 1992 Silverstone #17 SM2 FM I+ Turbo Honey B 1992 Sunburst Yellow #99 SM2L JR Supercharger Whooosh 2004 Titanium Mazdaspeed MX-5 LowCountry Miata http://www.lowcountrymiataclub.net Masters Miata RAGS 074 _____ _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
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