402 first start no idle warm
402 first start no idle warm well i just started my 402 for the first time i still have my old H/C combo tune in it and it idled great. idle trims were off very little. then as it hit about 175 or so it would dip to about 300 RPM and pick it self back up. it did that again at aroud 178 and now i cant get it to idle for the life of me. all it does now is start idle for about 1sec and drops. when ican get it to idle for a little bit i noitced the STIT kept climbing allthe way to 14.*^*( and then it dies????
i tuned my old 233-239 AFR205 11.4:1 346 to idle i did all the tuning spark and stuff. now my 244-248 AFR 205 11.7:1 402 for some reason is kickin my hinnee
any ideas????
i tuned my old 233-239 AFR205 11.4:1 346 to idle i did all the tuning spark and stuff. now my 244-248 AFR 205 11.7:1 402 for some reason is kickin my hinnee
any ideas????
at all temps up till it died the stit was around .20 i only niticed it would climb when i could get it to idle now. i was aligning it right now and i started it to set toe and it idled good its just when it get about like 177 that it goes crazy.
air flow is in the 14.43 at 133 13.12 At 154 11.95 at 177 10.20 At 198
air flow is in the 14.43 at 133 13.12 At 154 11.95 at 177 10.20 At 198
Did you change the engine size in your tune? If it still thinks its a 347, that would make it add a bunch of fuel with the fuel trims. but then again, it should have been messin up cold too...you would think
Engine;cyl volume. yours should be .708 if its still set for a 347. it needs to be set to .825 or so. That'll tell the computer what size the engine is. Also make sure if you changed injectors that you set the injector flow rate accordingly.
Those are the first 2 things to change for the computer to even get close.
Those are the first 2 things to change for the computer to even get close.
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Originally Posted by edcmat-l1
Engine;cyl volume. yours should be .708 if its still set for a 347. it needs to be set to .825 or so. That'll tell the computer what size the engine is. Also make sure if you changed injectors that you set the injector flow rate accordingly.
Those are the first 2 things to change for the computer to even get close.
Those are the first 2 things to change for the computer to even get close.
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Verdad Gallardo me to man this thing feels like a beast all i have done is take it around the building but man at 2grand it pulls harder than the old h/c setup ever did im so pumped. props to edcmat-l1 i just guessed at .8125 before i saw what you wrote and man it idles way better still have a ways to go likes to die at stop signs but ill jsut have to work on that. i got the stit to around -.10 and ltit -.05. i cant wait for the weather to get better......!!
injectors were done with the h/c
injectors were done with the h/c