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Hard starts...sometimes

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Old 01-09-2007, 08:32 PM
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Default Hard starts...sometimes
1996 Z28 camaro. new alternator, battery, and plugs. has 120k miles on it. sometimes it just doesnt want to start like its flooding. you can keep trying to crank it and give it some gas and it will eventually. if you stop trying to crank it, it will buck and act like its trying to, and you can hear the intake sucking in air.

Also this *normally* only happens on the first crank of the day or when its really cold outside. when the car does start though black smoke comes out the back. BUT it will drive fine after I get started, and you can turn it off and crank it right up without a problem.

Any ideas on this one guys? Gramps suggested possibly a cold crank sensor
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Old 01-10-2007, 04:44 PM
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bump for the day
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Old 01-10-2007, 05:06 PM
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ok I havent cranked it at all today but I got an aftermarket MAF
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Old 01-10-2007, 07:56 PM
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Could be the VATS. I had an intermittent starting problem and when I disabled it the problem went away. You will need tuning software to turn it off.
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Old 01-10-2007, 08:09 PM
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ok i tried the maf sensor thing. it started quicker than it normally does but still gave me a slight problem.
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Old 01-11-2007, 03:13 PM
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Originally Posted by 96slow6
I am sorry i would love to finish what i started but im from the other site ya'll hate now i guess. I have deleted all my other posts already except this one. I will delete it as soon as i know you hav got this message. Once again i am very sorry but i have to side with what i call home.
do what?
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Old 01-17-2007, 05:49 AM
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this is exactly what my car is doing right now, I need help trying to figure this problem out
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Old 01-17-2007, 04:02 PM
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im starting to think its my MAF. it could be telling the pcm to dump more fuel in and make for a rich, hard start since it ONLY acts up when its a cold start. it will run fine all day long except for the first crank of the day.
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Old 01-18-2007, 12:33 AM
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Originally Posted by Tainted
im starting to think its my MAF. it could be telling the pcm to dump more fuel in and make for a rich, hard start since it ONLY acts up when its a cold start. it will run fine all day long except for the first crank of the day.
my car is speed density so there isnt a maf,I dont get it though my car is doing exactly what yours is doing
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Old 01-19-2007, 12:06 AM
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ttt anyone else have an idea what the problem could be?
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Old 01-19-2007, 10:39 AM
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I had the same problem on my 94, changed the FPR and it started like a dream. Try that, nice cheap fix!

-J
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Old 01-19-2007, 11:35 AM
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Originally Posted by lastcall190
I had the same problem on my 94, changed the FPR and it started like a dream. Try that, nice cheap fix!

-J

whats the FPR?
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Old 01-19-2007, 11:57 AM
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Sorry, Fuel Pressure Regulator.
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Old 01-19-2007, 02:12 PM
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ahhh ok, any idea how ahrd that is to change and how long it normally takes?
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Old 01-19-2007, 03:06 PM
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We changed it on my friend's LT1 car in under an hour, just relieve pressure with the schrader valve, may/maynot need the fuel line removal tool, it was TOO long ago. Easily accomplished in the garage, just be prepared for some gas to spill unless you're real careful/lucky I think the directions were on the shoebox site for the f-body, but I can't find the address right now.

-J
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Old 01-19-2007, 04:14 PM
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awesome thanks
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Old 01-19-2007, 07:22 PM
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NP lemme know if it works or not...
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Old 02-10-2007, 05:17 AM
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I have the exact same problem but with my 98. Let me know what fixed the problem so I can try it on mine. Thanks
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Old 02-10-2007, 11:56 AM
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i aint tried anything on it yet. unplugging the MAF sensor seemed to help a tiny bit
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Old 02-11-2007, 12:15 AM
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try this turn the key to the on seting dont crank the engine try it a few times in a row and see if it starts up then. because it could be with the fuel pump
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