575sci running rough
#1
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Thread Starter
575sci running rough
Running real rough and rich. Will idle and stall. Can't get on plane. I see fuel in mechanical fuel pump vent line to back of carb so installed a new one. Same thing so changed tps sensor ,same thing. I'm lost and need some expert help.
Thanks
Thanks
#3
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sounds like your injectors may be leaking.
I'd test first,fuel pressure and then w/ key on,engine not running,see if the injectors are holding fuel.then start engine an look at the spray pattern.after that,get a scan tool on it.how old is the gas?and when was the last time cap and rotor,wires been changed?
I'd test first,fuel pressure and then w/ key on,engine not running,see if the injectors are holding fuel.then start engine an look at the spray pattern.after that,get a scan tool on it.how old is the gas?and when was the last time cap and rotor,wires been changed?
#4
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iTrader: (7)
sounds like your injectors may be leaking.
I'd test first,fuel pressure and then w/ key on,engine not running,see if the injectors are holding fuel.then start engine an look at the spray pattern.after that,get a scan tool on it.how old is the gas?and when was the last time cap and rotor,wires been changed?
I'd test first,fuel pressure and then w/ key on,engine not running,see if the injectors are holding fuel.then start engine an look at the spray pattern.after that,get a scan tool on it.how old is the gas?and when was the last time cap and rotor,wires been changed?
#7
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iTrader: (7)
Idle air control sensors. Does that have lAC sensors? Also read an older thread where the high pressure fuel pump to the cool fuel system wasn't working. Is it possible your spider fuel injection is cracked and something funky going on with it.
Fuel tank vent? That typically would starv for fuel so probably unlikely but thought I'd throw it out there anyway.
Fuel tank vent? That typically would starv for fuel so probably unlikely but thought I'd throw it out there anyway.
Last edited by getrdunn; 05-29-2016 at 04:06 PM.
#8
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Thread Starter
Fuel pressure should be good now with new regulator. Going to install new ignition coil, pick up coil, plugs wires and temp sensor and hope for the best. Only thing left after that is map sensor or ecu
#9
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iTrader: (2)
There are a lot more things that can be left. Check the basics first. Put a scanner on it, check the fuel pressure, make sure the injectors aren't dumping fuel , give it a tune up and do a leak down test on it. You will find the problem . No need in just throwing parts at it