im trying to get the combo that I have in my sig up and running the only difference is that im using a stock shortblock instead. For some reason my spout on the distributor no longer works so when i unplug it and plug it back in it doesnt change. So my question is does anyone have any ideas on what timing to try and run and what fuel pressure? I have had the timing over 30 degrees and the fuel pressure anywhere from 50-70 psi plugged and its a monster up top but has no bottom end power even with the 4.30 gearing. Any suggestions. Im going to have it dyno tuned eventually but I would at least like to get it running decent before then. Any help would be appreciated. Thanks guys.
LOCKED TIMING WITH AFR 165
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Fix the wiring problem in the SPOUT circuit rather than band aid the problem.
Possible causes:
Bad TFI module. The TFI takes the spark advance signal set from the computer and uses it to fire the coil.
Broken wire or bad connection -with the SPOUT connector in place, measure the resistance between between the yellow/lt green wire on the TFI module and pin 36 on the computer. You should see less than 1.5 ohms. Measure the resistance between the yellow/green wire and ground with both the computer and TFI connectors disconnected. You should see more that 1 meg ohm. Do not hold on to the metal probe tips with your bare hands when you make your measurements. Doing that will result in incorrect measurements. You can use a safety pin to probe the connecors from the rear.
Diagram courtesy of Tmoss & Stang&2birds
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.
The following is a view from the computer side of the computer connector.
Possible causes:
Bad TFI module. The TFI takes the spark advance signal set from the computer and uses it to fire the coil.
Broken wire or bad connection -with the SPOUT connector in place, measure the resistance between between the yellow/lt green wire on the TFI module and pin 36 on the computer. You should see less than 1.5 ohms. Measure the resistance between the yellow/green wire and ground with both the computer and TFI connectors disconnected. You should see more that 1 meg ohm. Do not hold on to the metal probe tips with your bare hands when you make your measurements. Doing that will result in incorrect measurements. You can use a safety pin to probe the connecors from the rear.
Diagram courtesy of Tmoss & Stang&2birds
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.
The following is a view from the computer side of the computer connector.
Attachments
I have a 306 with AFR 165's, 9.5 compression, N41 cam, and Systemax II and my fuel pressure set at 44 PSI gave me a 13.2:1 AFR on 24# injectors. You're dialing up fuel pressure too high with the 30# injectors, which may be overkill for your combination.
Listen to jrichker and fix the spout connector.
Listen to jrichker and fix the spout connector.
ONEFAST91GT
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