Help Needed: Intermittent hard start...
04-11-2011, 02:53 PM
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Help Needed: Intermittent hard start... Car: 1999 Camaro Z28 1le
Mods/specs: LS6 shortblock, milled stock heads, TR230 cam, kooks headers, magnaflow catback, 6-speed trans, stock computer, etc...
I put an engine in a car a while back. Everything is great with it....most of the time. The engine runs flawlessly. No knock, slight valvetrain noise(quiet exhuast with a cam), engine revs smoothly, no vibration, etc. The car definitley runs strong for a stock motor, stock air lid car lol. The problem is that SOMETIMES, it doesn't want to start right away. It sounds like the timing is 180* out. It had a cam sensor code when I first put the motor in, and my tach didn't work. Before getting a tune, we cleared the code, and all was fine (tach started working), but we I still had the hard start issue. I threw in another cam sensor since I had one laying around....no luck. Still does it.
This is what it does. As soon as I hit the key, it sounds like it's firing 180* out (like intake and exhaust backfires). If I KEEP the key ON, and try starting again, it does the SAME thing. If I turn the key OFF, then start over, it might start up like a normal car, but it still might act like the timing is 180* out. There is no rhyme or reason to when it does it. It does it hot or cold engine, hot or cold weather, etc. Everything is BRAND NEW with the engine. I might have to try cyling the key 5 times, or might fire right up 5 times in a row. You never know what it's going to do....
Any suggestions? I would really like to sell this car, but I can't sell it if it's acting like this. Car now has 27,000 miles on it. I have put just under 2,000 miles like this.
Thanks in advance.
Mods/specs: LS6 shortblock, milled stock heads, TR230 cam, kooks headers, magnaflow catback, 6-speed trans, stock computer, etc...
I put an engine in a car a while back. Everything is great with it....most of the time. The engine runs flawlessly. No knock, slight valvetrain noise(quiet exhuast with a cam), engine revs smoothly, no vibration, etc. The car definitley runs strong for a stock motor, stock air lid car lol. The problem is that SOMETIMES, it doesn't want to start right away. It sounds like the timing is 180* out. It had a cam sensor code when I first put the motor in, and my tach didn't work. Before getting a tune, we cleared the code, and all was fine (tach started working), but we I still had the hard start issue. I threw in another cam sensor since I had one laying around....no luck. Still does it.
This is what it does. As soon as I hit the key, it sounds like it's firing 180* out (like intake and exhaust backfires). If I KEEP the key ON, and try starting again, it does the SAME thing. If I turn the key OFF, then start over, it might start up like a normal car, but it still might act like the timing is 180* out. There is no rhyme or reason to when it does it. It does it hot or cold engine, hot or cold weather, etc. Everything is BRAND NEW with the engine. I might have to try cyling the key 5 times, or might fire right up 5 times in a row. You never know what it's going to do....
Any suggestions? I would really like to sell this car, but I can't sell it if it's acting like this. Car now has 27,000 miles on it. I have put just under 2,000 miles like this.
Thanks in advance.
