help fuel problem
08-17-2010, 10:54 PM
#1
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help fuel problem
hi my 4 runner wont start it rotates but it docent start i chek my fule preser and its at zero so i chang my fuel filter and also my pump and it still don't start i also jumpt the fuel pump and the fuel pump turns on but the car wont . i already put on a new Maine relay also cir cult opening relay ,efi realy and it still don't work ! any advice guys??
08-18-2010, 10:20 AM
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Try to pull a code. If that doesn't work you may have blown the EFI fuse. I had my o2 sensor wire burn and ground itself, blowing the fuse. New fuse was $2 at dealership. Repair wires before replacing fuse
08-19-2010, 02:49 AM
#7
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thanks man for the reply i check the the efi relay but it came out good than i check the ecu fuse next to the driver side kike panale and it was blown so i check it with a test light and it dint have current on both sides!! im getting so frustrated
that im thinking of sealing it but i love my truck so much i have so many memory's with it ...... i dont rally whant to do it
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08-19-2010, 03:02 AM
#9
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i tride bulling a code today but it was rapid lee blinking y whold it do that the code look like this !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! unstated of code= !!_!=21 what and haw whold this happen??
08-19-2010, 08:09 AM
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You don't think you have fuel pressure? But you jumpered your fuel pump and it still won't start?
Have you tried spraying a mist of fuel in the intake to see if she will fire?
Spark?
Compression?
What do the spark plugs look like?
Have you tried spraying a mist of fuel in the intake to see if she will fire?
Spark?
Compression?
What do the spark plugs look like?
08-19-2010, 09:59 AM
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I assumed you checked the fuel pressure with a fuel pressure gauge (usually hooked on near the pulsation damper, but zero is zero anywhere on the rail). I also assumed that you checked the fuel pressure with the pump running when you jumpered the FP connector. If the pump is running and you have no fuel pressure then it doesn't have anything to do with any relay or ecu.
Your fuel pump may be toast, or you may have a blocked fuel line (less likely, as long as it was running recently). Since you're going to need to drop the fuel tank to get to the pump, you can (gently!) put some compressed air on the fuel line to make sure it is clear up to the fuel rail.
Diagnosis: one step at a time.
Your fuel pump may be toast, or you may have a blocked fuel line (less likely, as long as it was running recently). Since you're going to need to drop the fuel tank to get to the pump, you can (gently!) put some compressed air on the fuel line to make sure it is clear up to the fuel rail.
Diagnosis: one step at a time.
08-19-2010, 10:14 AM
#13
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the compression not yet
there is spark and every thing from the ignition is new
thanks for the advice
08-19-2010, 10:17 AM
#14
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every thing is new but im going to try fuel in the trhotal body thanks guys!
08-19-2010, 10:19 AM
#15
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i assumed you checked the fuel pressure with a fuel pressure gauge (usually hooked on near the pulsation damper, but zero is zero anywhere on the rail). I also assumed that you checked the fuel pressure with the pump running when you jumpered the fp connector. If the pump is running and you have no fuel pressure then it doesn't have anything to do with any relay or ecu.
Your fuel pump may be toast, or you may have a blocked fuel line (less likely, as long as it was running recently). Since you're going to need to drop the fuel tank to get to the pump, you can (gently!) put some compressed air on the fuel line to make sure it is clear up to the fuel rail.
Diagnosis: One step at a time.
Your fuel pump may be toast, or you may have a blocked fuel line (less likely, as long as it was running recently). Since you're going to need to drop the fuel tank to get to the pump, you can (gently!) put some compressed air on the fuel line to make sure it is clear up to the fuel rail.
Diagnosis: One step at a time.
08-19-2010, 09:06 PM
#16
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i finally made the fuel work it was a short on the air mass senser but it wont start i got fuel pressure and also spark i cheek my spark plug weirs and they are good any suggestions??
08-19-2010, 10:56 PM
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Im sure you checked but doesnt hurt to mention looking at all the grounds to everything and checking for kinks/bends/leaks.
Im currently having an extremely similar problems (thread labeled "injection/starting problems" ) so Im definately paying attention here
Im currently having an extremely similar problems (thread labeled "injection/starting problems" ) so Im definately paying attention here
Last edited by jpsstewart3; 08-19-2010 at 10:57 PM.
08-20-2010, 11:47 AM
#18
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