LT1 No start kick back
#1
LT1 No start kick back
Hey Fellas; Got a 94 Z28 project car for real cheap and am having trouble starting it.
It has 117,000 miles and previous maintenance is unknown.
Had to replace the Bendix drive on the starter to get to this point; but when trying to start, the motor will crank and then once you let go of the key the motor will kick back.
Hopefully it hasn't destroyed a rod or valve yet, but what exactly would be the cause or things I can check.
Would the Optispark cause this condition?
Or does it looked like it jumped timing?
Appreciate any help.
It has 117,000 miles and previous maintenance is unknown.
Had to replace the Bendix drive on the starter to get to this point; but when trying to start, the motor will crank and then once you let go of the key the motor will kick back.
Hopefully it hasn't destroyed a rod or valve yet, but what exactly would be the cause or things I can check.
Would the Optispark cause this condition?
Or does it looked like it jumped timing?
Appreciate any help.
#3
Re: LT1 No start kick back
I tested the ICM and had Advance test it also and it come back good.
Primary and Secondary on the coil was high. Can't remember primary but secondary was at 9300.
I also tested the harness going to the optispark
a= 5v
b= 5v
c= 12v
d= 136 ohms with key on and 3.3 with key off.
I'll test some more this evening and double check last nights results.
Thanks for the reply.
#4
Re: LT1 No start kick back
If it can't even complete a revolution, I would be pulling plugs. Since the starter was already broken, it makes me think the scenario of a filled cylinder is a possibility. You can easily bend a rod in that situation.
#5
Re: LT1 No start kick back
That's why I haven't tried to start it anymore.
It would keep making revolutions, but once you let up it would spin back to where it started and clunk and bang. I would say the damage is already done, but I'm hoping not. Timing is off bad or like you said a cylinder is full. Gotta work today, but I'll try to pull the plugs this evening or tomorrow.
It would keep making revolutions, but once you let up it would spin back to where it started and clunk and bang. I would say the damage is already done, but I'm hoping not. Timing is off bad or like you said a cylinder is full. Gotta work today, but I'll try to pull the plugs this evening or tomorrow.
#7
Re: LT1 No start kick back
Checked plug wires last night and it is good according to the Haynes manual.
If I pull the ignition fuse it will continue to turn over and not kick back when the key is released.
So something in the ignition or timing is off. I wish it wasn't a 94 so I could read the codes. I may put a post on a local board to see if anyone has a reader and can check them for me.
If I pull the ignition fuse it will continue to turn over and not kick back when the key is released.
So something in the ignition or timing is off. I wish it wasn't a 94 so I could read the codes. I may put a post on a local board to see if anyone has a reader and can check them for me.
#8
Re: LT1 No start kick back
#9
Re: LT1 No start kick back
If I could just get it running first, I wouldn't care to invest in a few things.
Thanks.
#10
Re: LT1 No start kick back
An Opti that isn't indexed correctly could cause the problem. Did the previous owner replace it recently? A rotor the has come loose but is still turning could cause the problem.
This assumes it has not started or run since you bought it . Was it running for the previous owner?
This assumes it has not started or run since you bought it . Was it running for the previous owner?
#11
Re: LT1 No start kick back
Found out what the problem was.
Seen a wire hanging from under the steering column so I pulled the panel off and saw a black box. Researched it on the net and it's an aftermarket security system. Unplugged all the connectors and she fired right up. Can't believe it was something so simple.
Thanks for all the replies. Appreciate the help. I'll get her cleaned up and post some pics when she's done.
Seen a wire hanging from under the steering column so I pulled the panel off and saw a black box. Researched it on the net and it's an aftermarket security system. Unplugged all the connectors and she fired right up. Can't believe it was something so simple.
Thanks for all the replies. Appreciate the help. I'll get her cleaned up and post some pics when she's done.
#13
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