LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Running really slow

Old Feb 17, 2007 | 10:05 AM
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Default Running really slow

So after taking my car to the track last night it is defanatley running slow, i cant figure it out problem goes as follows.....If my car has been sitting for a long period of tim like overnight or 5-6 hours it runs awesome does not hesitate at all and acclerates like it should but after driving for about 10-15 minutes it starts to run really crappy , idling rougher hesitating when acclerating and just not feel as fast as it should???? HELP!!!
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Old Feb 17, 2007 | 03:50 PM
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Sounds like an oxygen sensor....Unplug them for a trip down the road and see if that doesn't clear up anything. It also could be the ignition moduel. When they heat up, they will cause a car to miss, or just litteraly die all together.
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Old Feb 18, 2007 | 09:37 AM
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No SES light? If not, maybe your EGR is fugged up. How old are your plugs/wires? I had a burnt wire that made my car run like that. If it's not throwing a code, it makes it a little harder to track down.
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Old Feb 18, 2007 | 10:09 AM
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Poor running is just something to remind you you have an lt1..



And its prolly o2's
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Old Feb 18, 2007 | 10:15 AM
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Originally Posted by Sgt. Spuds
Poor running is just something to remind you you have an lt1..



And its prolly o2's

Why cut yourself and everybody else on here down like that? It think my motor runs decent, and several others do. I think its time you did another mod to your motor to lift your spirits.
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Old Feb 18, 2007 | 10:18 AM
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Originally Posted by 97LT1
Why cut yourself and everybody else on here down like that? It think my motor runs decent, and several others do. I think its time you did another mod to your motor to lift your spirits.

Most lt1's are ragged out and never fixed. This is a benefit to those who take the time and money to assemble one right. People think it's just an lt1.
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Old Feb 18, 2007 | 10:22 AM
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Originally Posted by 97blkz
Most lt1's are ragged out and never fixed. This is a benefit to those who take the time and money to assemble one right. People think it's just an lt1.
true, but I wouldnt expect a general comment like that from somebody that owned one.
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Old Feb 18, 2007 | 05:52 PM
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[QUOTE=LT14LIFE JT]No SES light? If not, maybe your EGR is fugged up. How old are your plugs/wires? I had a burnt wire that made my car run like that. If it's not throwing a code, it makes it a little harder to track down.[/



I have no idea how old my plugs/wires are i know i have never changed them so im gonna start with that then the o2 sensors ...hopefully its not the opti
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Old Feb 18, 2007 | 06:25 PM
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you didn't answer it, but wondering if the SES light is on? (right away, or after it warms up)


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Originally Posted by Sgt. Spuds
Poor running is just something to remind you you have an lt1..
got a kick out of that btw, nothing like a little self humor
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Old Feb 18, 2007 | 09:00 PM
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no ses light is on just the check engine light cause i have not reset it since replacong my heads
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Old Feb 18, 2007 | 09:17 PM
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have you tested to see what codes it is throwing?
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Old Feb 18, 2007 | 10:12 PM
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If it is not setting the SES light, most like likely, it is not the O2's. While it would not hurt the change them, try changing the teperature sensor in the water pump. That is the one the computer uses to base it's tune on. It's alot cheaper than O2's.

My 2 cents
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Old Feb 18, 2007 | 11:15 PM
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I AM A COMPLETE ******* IDIOT, i just realized that ses stands for SERVICE ENGINE SOON which is in fact on in my car....i i had it read a couple months ago by my brother he said something about a misfire????
btw. ses on right away all the time
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Old Feb 18, 2007 | 11:19 PM
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get it checks it if it says multiple misfires that means o2 sensors most likely.
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Old Feb 18, 2007 | 11:23 PM
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Originally Posted by Sgt. Spuds
Poor running is just something to remind you you have an lt1..



And its prolly o2's
speak for your car Mine runs like firebat out of hell and back to get more
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Old Feb 18, 2007 | 11:27 PM
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Originally Posted by grnmonster
I AM A COMPLETE ******* IDIOT, i just realized that ses stands for SERVICE ENGINE SOON which is in fact on in my car....i i had it read a couple months ago by my brother he said something about a misfire????
btw. ses on right away all the time

Lol, it happens. defintly find out what codes it's throwing.
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Old Feb 18, 2007 | 11:46 PM
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Originally Posted by 97Lt1TA
get it checks it if it says multiple misfires that means o2 sensors most likely.
i believe thats exactly what it said...time for new o2 sensors
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Old Feb 19, 2007 | 12:01 AM
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Originally Posted by grnmonster
i believe thats exactly what it said...time for new o2 sensors
if i was you i would put new wires and plugs if you havent done that yet would be a good tune up for the car
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Old Feb 19, 2007 | 12:05 AM
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Originally Posted by 97Lt1TA
if i was you i would put new wires and plugs if you havent done that yet would be a good tune up for the car
yea im also gonna do new plugs and wires for sure ...its about time anyways, man this car is draining me lol
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Old Feb 19, 2007 | 12:09 AM
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Originally Posted by streetwarrior96
speak for your car Mine runs like firebat out of hell and back to get more
haha so does mine

bad 02, 2 burned wires with oil spraying out of my valve cover almost catching my car on fire i was still smoking tires through 3 gears
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