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boyt911sc boyt911sc is online now
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Join Date: Mar 2002
Location: Philadelphia, PA
Posts: 12,682
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CIS Troubleshooting............

Blue,

Now that you have a fuel pressure gauge, you can start analyzing your control fuel pressure. Start measuring your CCP (cold control pressure) until it stabilizes to WCP (warm control pressure). Run the FP by bridging terminals #87A & #30 (FP relay socket) at 30 sec. intervals until WCP stopped increasing. No longer than 5 mins. And no need to run the motor. Just the FP with a fully charged battery.

To test if your return line is clogged or restricted, disconnect the return line near intake runner #3 and measure your cold control pressure. This test should be done first before doing any fuel pressure test. Disconnect the WUR electrical plug. Check the control pressure. Record the pressure reading. Next, disconnect the return line connection to the gas tank and measure again the control fuel pressure. There should be no significant pressure reading between the two (2) readings. Keep us posted.

Tony
Old 10-14-2019, 09:17 AM
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