devilisht2003 Posted January 21, 2006 Share Posted January 21, 2006 took a friend home to purdue from indy ( about 1-1:15 of interstate ) last night. when coming home on one of the ramps to another interstate my car was real rough and almost bucking when i accellerated back to speed. then this morning my car wouldnt start. crank and crank and crack but no start. held the pedel to the floor to unflood it and still nothing let it sit awhile and STILL nothing.....FINALLY after holding the pedel to the floor and feather the pedel some it started but was a very rough and studery start.......any ideas???? it does this everytime i drive very long on the interstate...studers when i try to roll on and wont start very easy the next day. also noticed that if i keep the car in D not OD then it acts a lot better and doesnt have that bogging feeling. if i leave it in D and try to roll on and get it to downshift to D then it acts fine....... any ideas? Quote Link to comment Share on other sites More sharing options...
JB4XX Posted January 21, 2006 Share Posted January 21, 2006 plug wires are shot. open the hood tonight in a completely dark location and see if you see a fireworks show 8) Quote Link to comment Share on other sites More sharing options...
Redd Posted January 21, 2006 Share Posted January 21, 2006 What year is this car? Quote Link to comment Share on other sites More sharing options...
devilisht2003 Posted January 22, 2006 Author Share Posted January 22, 2006 fireworks arent good! its a 95 Quote Link to comment Share on other sites More sharing options...
Redd Posted January 22, 2006 Share Posted January 22, 2006 Sounds like its your fuel pump. Quote Link to comment Share on other sites More sharing options...
demon Posted January 22, 2006 Share Posted January 22, 2006 Sounds like your plugs are trying to foul. How many miles on the plugs and plug wires? Is it a Z-28 or a V-6? Any modifications like a computer reprogram, high flow air filter, or free flowing exhaust? Quote Link to comment Share on other sites More sharing options...
RichardCranium Posted January 22, 2006 Share Posted January 22, 2006 Definitely change plugs/wires. A new fuel filter wouldn't hurt either. Quote Link to comment Share on other sites More sharing options...
devilisht2003 Posted January 22, 2006 Author Share Posted January 22, 2006 yeah it has some mods........ 1995 Z28 Deep Metallic Purple, Bose, Headers, Flowmaster 40 Series, No Cats, MSD A6 Ignition, K&N Filter, GMS Rear Control Arms, GMS Panhard Rod, Chrome ZR1 Rims, BFGoodrich G-Force T/A KDWS Tires i plan on tryin to get plugs and wires done soon Quote Link to comment Share on other sites More sharing options...
Redd Posted January 22, 2006 Share Posted January 22, 2006 Could be cap and rotor. Quote Link to comment Share on other sites More sharing options...
devilisht2003 Posted January 22, 2006 Author Share Posted January 22, 2006 hope to hell its not that cuase its behind my water pump Quote Link to comment Share on other sites More sharing options...
DeaconXX Posted January 23, 2006 Share Posted January 23, 2006 unlikely the cap/rotor. LT1's behave differently when the distributor goes out (I've replaced 4). I've had the same problem, turned out to be excessive heat killing my MSD box. Does it have a bypass where you can unplug it and re-attach your factory harness? might try that and duplicate the scenario. More than likely it's not your fuel pump unless you had less than a 1/4 tank. Quote Link to comment Share on other sites More sharing options...
DeaconXX Posted January 23, 2006 Share Posted January 23, 2006 OH, are they shorty headers or longtubes? Quote Link to comment Share on other sites More sharing options...
devilisht2003 Posted January 23, 2006 Author Share Posted January 23, 2006 can i try to move the MSD box to a cooler spot or something? i'm not sure about the by pass Quote Link to comment Share on other sites More sharing options...
DeaconXX Posted January 23, 2006 Share Posted January 23, 2006 you can move it, Just make sure it's in a dry/clean spot. I see alot of firewall installs, but shorty's will cook it Quote Link to comment Share on other sites More sharing options...
devilisht2003 Posted January 23, 2006 Author Share Posted January 23, 2006 mines down behind the drivers headlight where the intake is with my FIPK Quote Link to comment Share on other sites More sharing options...
DeaconXX Posted January 23, 2006 Share Posted January 23, 2006 doesn't sound like that would be a hot area, but doesn't that area get alot of leaves and dirt & crap? I had mine up on the fender well (94' Impala) and it overheated driving about 1.5hrs highway. any ignition issue will show at RPM not after time/distance unless your headers are cooking your plugs/wires. Assuming you have a good fuel pressure regulator and fuel filter, the fuel pump is prone to overheating if you drive around alot on 1/4 tank or so. Quote Link to comment Share on other sites More sharing options...
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