Help, no start
08-05-2009, 05:22 PM
#1
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Help, no start I have a 95 vert z28 stock it was running perfectly and one morning would not start.
Original opti with newer cap rotor(riveted & sealed), the motor cranks and sometimes starts
I can get it to start if pedal is wot, but idles as if its lean and dies if i punch it and get rev it up slowly though.
At the beginning it was getting no injector pulse(when it was not starting) now it gets a weak pulse (with noid light), injectors get full voltage.
Fuel pressure has been constant whether car started or not, 41 prime and 37-38 running constant pressure.
Check gauges light is on, gauges work, light was on before I removed waterpump.
I tried replacing opti with a good used unit and same symptoms.
Today I will be checking and cleaning all grounds.
Is there any way to check ignition switch without replacing it yet?
I don't have a scanner but will be hunting my neighbor down so I can use his
Any ideas?
Original opti with newer cap rotor(riveted & sealed), the motor cranks and sometimes starts
I can get it to start if pedal is wot, but idles as if its lean and dies if i punch it and get rev it up slowly though.
At the beginning it was getting no injector pulse(when it was not starting) now it gets a weak pulse (with noid light), injectors get full voltage.
Fuel pressure has been constant whether car started or not, 41 prime and 37-38 running constant pressure.
Check gauges light is on, gauges work, light was on before I removed waterpump.
I tried replacing opti with a good used unit and same symptoms.
Today I will be checking and cleaning all grounds.
Is there any way to check ignition switch without replacing it yet?
I don't have a scanner but will be hunting my neighbor down so I can use his
Any ideas?
08-05-2009, 05:23 PM
#2
Staging Lane
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I got my hands on a snap on scanner the car no longer starts, still cranks,
tried one used opti and one new, same symptoms; sparks, cranks, no injector pulse, the scanner gave me a code 18(no crank signal) everything else checks out.
Scanner states it might be an ecm problem and to check all grounds, I have cleaned the ecm ground on the block, the one on the driverside/coil stud area, new strap, cleared codes and still no go, same code pops up
tried one used opti and one new, same symptoms; sparks, cranks, no injector pulse, the scanner gave me a code 18(no crank signal) everything else checks out.
Scanner states it might be an ecm problem and to check all grounds, I have cleaned the ecm ground on the block, the one on the driverside/coil stud area, new strap, cleared codes and still no go, same code pops up
08-05-2009, 05:51 PM
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I don't have another pcm but the scanner just started going into mismatch communication/no communication to spitting out just about every code there is like 52 53 then it went back to normal just sending code 18 and 48( but thats cause I have the maf off)
08-27-2009, 02:15 PM
#7
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Double checked everything, replaced terminals on ground wires due to some corrosion and nothing.
Decided to go with the code the snap on scanner gave me which was no crank signal and started checking found that there was no juice going to the crank fuse by the driver's side door and then traced it lower
I think its the ignition switch and connector
Decided to go with the code the snap on scanner gave me which was no crank signal and started checking found that there was no juice going to the crank fuse by the driver's side door and then traced it lower
I think its the ignition switch and connector
