wont start after injector change
#1
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wont start after injector change
ok so i just got my injectors back from cleaning at rc eng. put them in and put my car back together and now it wont start and if it does start it wont idle at all and runs real rough. anyone got any ideas
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yes i replaced the fuel filter. someone already asked me if i put it in backwards and i said with the way the FD fuel filters are thats highly unlikely. no i havent changed the plugs yet that one of my next steps. the stock injectors were just cleaned and put back in. someone did bring up a good point i had not thought of, if i put the wrong vacum line on the fuel pressure regulator that could cause some issues. is that a possibility???
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#9
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An injector is stuck, I would bet anything. Especially if you didn't put them in right when you got them. The cleaning fluid causes them to stick if it dries. Pull them out and wire a 9volt battery to them, tapping them on and off and see if you hear a click. If you don't, the injector is stuck.
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Also double check that you have the correct connector attached to them. I accidentally swapped the connectors on my primaries once and it caused the car to barely start, run very rough, and then flood out. Good luck
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ok so i have done some more tests it apears i have the injectors hooked up corectly.i also tested all the of them to see if they click and they do. all the vacum lines look right. i am getting spark and there is fuel on the plugs. if i crank it to much fuel actually seeps out from between the dp and mid pipe so i got plenty of fuel. so timming i guess???? what boggles my mind is that before i pull the injectors it was running fine it just had a drip which caused the dp to glow. anyone got any ideas????
#17
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Listen to what you just said man...If you have THAT much fuel going into your motor it's running WAY too rich. You've probably fouled 1 or both of the plugs in that housing, so there's going to be even more unburned fuel going into the exhaust. You clearly have a sticking/stuck injector on your hands. I highly doubt it's timing related if you witnessed that much fuel pouring out from between your DP and MP. It's starting then dying because it's being choked to death with too much gasoline.
Last edited by TRWeiss1; 03-15-08 at 01:08 PM.
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ok let me just throw this out there is it possible that my ecu is shot and keeping the injectors open longer than they need to be? also i have a power fc i was waiting to hook up until i got everything running right if it is in fact a bad ecu useing the power fc would fix this correct?
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Swaping out the ECU with the power FC would be easier than pulling the injectors. At least try it and see if the symptoms remain the same. If they are, put the old ECU back in and take a better look at the fuel system.
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-Spence
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ok so i went through the procedure to clear a flooded engine and then it started right up however it didnt stay lit after a minute or two to bogged out and i couldnt save it or get it started again. now exactly which injectors are firing durring starting? its just the primarys right?
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I know this an old thread, but I'm now having the exact same issue on my car. I upgraded my primary and secondary injectors to 1050cc. Everything else is bone stock, except I deleted the Air Pump and installed a PowerFC.
The car would start but was super bogged down and idled super rough. Eventually it just got to where it wouldn't start at all. So then I told the PowerFC to reduce primary injector firing by like 45%. Still wont start. We have spark. Have fuel. Definitely have compression. The car just cranks infinitely and wont start. Tried swapping out ECUs. Tried stock ECU. Replaced Primary Coil Pack.
The car would start but was super bogged down and idled super rough. Eventually it just got to where it wouldn't start at all. So then I told the PowerFC to reduce primary injector firing by like 45%. Still wont start. We have spark. Have fuel. Definitely have compression. The car just cranks infinitely and wont start. Tried swapping out ECUs. Tried stock ECU. Replaced Primary Coil Pack.
#25
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Put it back to stock injectors and ecu. Hand your car to someone that knows what they're doing to do the change correctly. The scenario you described is a precursor to how good cars end up rotting away. An injector upgrade is in no way as simple as you described. Your approach also indicates you did little to no research before changing parts out.
Without a datalogit you're not going to get the result you're looking for and even then you need to know how to use fc edit. Even with the associated hardware and software you still need BASIC tuning capabilities to get it to run correctly. Stop everything you're doing and hand the car off as is or revert back to stock.
Without a datalogit you're not going to get the result you're looking for and even then you need to know how to use fc edit. Even with the associated hardware and software you still need BASIC tuning capabilities to get it to run correctly. Stop everything you're doing and hand the car off as is or revert back to stock.