Help needed with LT1
Thread Starter
Teching In
Joined: Dec 2002
Posts: 6
Likes: 0
From: usa
Help needed with LT1 I have a 93 Pontiac TransAm as my daily drive.
Recently I had to rebuild the engine due to a spun bearing (130,000miles)
Well when the car gets hot, it starts to miss-fire.
Let it cool down and its fine again.
I have already replaced plugs, wires and the coil.
Any ideas?
Recently I had to rebuild the engine due to a spun bearing (130,000miles)
Well when the car gets hot, it starts to miss-fire.
Let it cool down and its fine again.
I have already replaced plugs, wires and the coil.
Any ideas?
TECH Addict
Joined: Nov 2001
Posts: 2,593
Likes: 0
From: TEXAS
Re: Help needed with LT1 Hace you tried using 93 octane or the highest available in your area? I believe these cars are set up to run on premium gas, but they do have a fail safe in them for low octane gas. Your octane may be too low and you're causing detonation. Also, is your coil still mounted on the drivers head or have you done the spacer mod yet? By using some longer bolts and something as a spacer (washers, nuts, anything) you can move the coil about an inch off of the head allowing it to run cooler and not get 'heat soaked'.
Re: Help needed with LT1 try cleaning your fuel injectors. they could be dirty. when rebuilding a motor its always recommended to clean your fuel injectors. sometimes injectors get a little dirty and start to cause misfires when reaching eot. also quit being cheap and put 92+ octane. one last thing, check your plugs and make sure none are fouled out. that will also cause a misfire. <img border="0" alt="[Fluffy]" title="" src="graemlins/fluffy.gif" />
TECH Fanatic
Joined: Nov 2001
Posts: 1,098
Likes: 0
From: I-L-L-I-N-O-I-S
Re: Help needed with LT1 </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mighty mex:
<strong>try cleaning your fuel injectors. they could be dirty. when rebuilding a motor its always recommended to clean your fuel injectors. sometimes injectors get a little dirty and start to cause misfires when reaching eot. also quit being cheap and put 92+ octane. one last thing, check your plugs and make sure none are fouled out. that will also cause a misfire. <img border="0" alt="[Fluffy]" title="" src="graemlins/fluffy.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I agree, have your fuel filter/injectors checked. And also, only use premium fuel(91+ octane). Your car will run like crap if you don't. That could very well be your problem right there.
Mike
<small>[ December 17, 2002, 06:10 PM: Message edited by: 2000LS1Z28 ]</small>
<strong>try cleaning your fuel injectors. they could be dirty. when rebuilding a motor its always recommended to clean your fuel injectors. sometimes injectors get a little dirty and start to cause misfires when reaching eot. also quit being cheap and put 92+ octane. one last thing, check your plugs and make sure none are fouled out. that will also cause a misfire. <img border="0" alt="[Fluffy]" title="" src="graemlins/fluffy.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I agree, have your fuel filter/injectors checked. And also, only use premium fuel(91+ octane). Your car will run like crap if you don't. That could very well be your problem right there.
Mike
<small>[ December 17, 2002, 06:10 PM: Message edited by: 2000LS1Z28 ]</small>
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