Running like shit after header install
02-06-2005, 02:23 AM
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Running like **** after header install Just like the title says.I had shorties in my sig and car was previously tuned, today I put Macs w/ catted y and OMG does it run like ****.Wont start w/o giving it gas, then it idles ok in park /neutral but drives like ****.I drive car idles in drive w/o brakes on at 2200 after install.When I brake say at a stop light and it dies.My ses light is on.Has no power at all,(well I can still smoke the tires a little.)Any ways please help.
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02-06-2005, 06:44 AM
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I dont have any way to pull the ses codes.Just a little more info I pulled #7,6,8 plugs and and all the wires.On pass side I pulled all coil packs 1 at a time(1998) #2,4,6,8 and put them back in right order I think(the wireharness seemed to want to go in the way I put them back)As for the o2 I didnt move the harness any where just unplugged them and then moved o2s around and plugged them back in.I did notice when I gave it a test fire w/ only headers on it sounded real unhealthy.Now usually you can get it to ldle w/o throwing ses light because when car is first turned on w/ open headers because the computer doesnt even use the rear o2s for a little bit.I'm hoping that is enough info for some help.Superbowl sunday is a real shitty day to try and fix the car thanks for the help guys/gals.
02-06-2005, 04:07 PM
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had basically the same problem, with pacesetters LT, i had a misfire. thats what it sounds like to me. i changed my plugs to ngks, and got new vette o2 sensors. i suggest go to autzone and scan your car. then check all of your plugs again and see if they are the right gap and make sure none of them are cracked, and also make sure your sensors are in snug and arent damaged in any way.
02-06-2005, 05:39 PM
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I seemed to have bent the inside of my msd#8 plug wire.I changed the #1 plug wire to #8 and then fixed the messed up wire and put it on #1.Drives a little better but in drive it still idles at 2200 has no power under load, all my sensors seem to be connected and fine.Does moving the o2s around mess with pcm?I still havent been able to go to autozone.
02-06-2005, 07:19 PM
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So I made it to autozone and read the code.The code was P0123/TPS pedal position sensor A circuit high input.So I got new tps changed it in parking lot cleared codes and then, same STUPID BS!WTF?I'm so pissed dont know what else to do.
02-06-2005, 07:56 PM
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Fixed it!!!!!!!!!!I have a Venom400 control module that I dont use any more but its still on my car.Well when I disconnected the battery I also diconnected the venom ground.Well the venom is spliced into the pcm on the map & tps.I didnt hook the ground back up to the venom because I dont use it.Well the p0123 is a high input.It just dawned on me that the power was still hooked to the venom but the ground wasnt.So it may be sending more voltage to the tps.So I hooked the venom ground back up and it worked car runs fine ses is still on but I wait and see if it resets its self.Thanks for everyone's help.