jinxed45 Posted November 15, 2005 Report Share Posted November 15, 2005 Hello! My 1997 Cadillac Eldorado ETC w/ 120k JUST recently gave me the P0300 code. It was driving a bit rough for a day before the code came about. I have already replaced plugs with ACDelco plugs, and the wires were Standard wires FOR THE 97 ETC from RockAuto. I took these steps because I researched caddyinfo before posting. But now, it seems the problem still exists. Questions: 1. Maybe my amateur installation wasn't good enough? I remember someone saying that moving the wires around "can have a detrimental effect on them"? info: the cavities has a tiny bit of dirt in them, been like that for a while though. 2. Distributor cap, could that be it? Easy to fix (for amateur)? 3. What other steps should I take? This problem seemed to occur right after I did some "aggressive driving" making sharp turns and accelerating rapidly. Maybe a sensor went out? I'm a quick learner.. please let me know if you can help! Thanks in advanced. Link to comment Share on other sites More sharing options...
jinxed45 Posted November 15, 2005 Author Report Share Posted November 15, 2005 Also.. I recieve the BLINKING SES Light when accelerating, Neutral seems to be fine, but still rough. The engine is literally shaking violently. Link to comment Share on other sites More sharing options...
JasonA Posted November 16, 2005 Report Share Posted November 16, 2005 The blinking SES light while accelerating, as well as a severe shake, definitely points to a major misfire. Hmm... No distributor cap on a Northstar, so it can't be that. With the car off, and going into the OBD, are there any codes besides P0300? When you replaced the ignition wires, did you do them one at a time, or otherwise organize them so you couldn't have crossed them up? Do the new wires have the cylinder number (1-8) marked on them to prevent crossing them? We'll get this figured out! Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
Ranger Posted November 16, 2005 Report Share Posted November 16, 2005 Replacement wires do not have numbers on them. Just make sure #1 goes to #1, #2 to #2 and so one. Be sure when you plug them on to the plugs, they seat real well and snap on to the plug. Link to comment Share on other sites More sharing options...
jackc Posted November 16, 2005 Report Share Posted November 16, 2005 Check for a good spark to each plug. You may have a coil going bad. Link to comment Share on other sites More sharing options...
jinxed45 Posted November 16, 2005 Author Report Share Posted November 16, 2005 The wires were done one by one to prevent crossing. I'm sure that's not the problem. Everything is on nice and snug. How do I check the spark on each plug? After researching the boards, I found it could be EGR Valve buildup? When the car is off, I get the same codes as when the car is on: PCM P0146 Current (Heated O2 Sensor) - Replaced 10k miles ago, still get the code P0300 Current - Engine Misfire P0603 History IPC B1552 History U1255 Current ACM B1348 History (What's this? Couldn't find in Service Manual, I'm blind) TCS C1255 History RSS C1738 Current C1783 Current C1785 Current MSM B0856 History B1983 History I seem to recall having all of these codes since I purchased the vehicle, except for P0300 and B1348. So they SHOULDN'T have anything to do with my engine misfire code. Thanks! Link to comment Share on other sites More sharing options...
jinxed45 Posted November 16, 2005 Author Report Share Posted November 16, 2005 Are coils easy to replace.. where can I find a How To for that? Link to comment Share on other sites More sharing options...
cdictas Posted November 16, 2005 Report Share Posted November 16, 2005 jinxed45, Check my posting under topics "Low RPM intermittent misfire" and "Coil Pack" Good luck, Chuck Link to comment Share on other sites More sharing options...
JasonA Posted November 16, 2005 Report Share Posted November 16, 2005 Replacement wires do not have numbers on them. Just make sure #1 goes to #1, #2 to #2 and so one. Be sure when you plug them on to the plugs, they seat real well and snap on to the plug. Larry, the Autolite Professional wires I bought after GMpartsdirect screwed up my ACDelco plug wire set order does have numbers. And they're the correct length. Quality set if you ask me. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
Ranger Posted November 16, 2005 Report Share Posted November 16, 2005 Are coils easy to replace.. where can I find a How To for that? Coils are very easy to replace. Just look at them. It is self explanitory. Replace them one at a time with a known good one borrowed from another car to save yourself the expense of buying a new one for nothing or listen to each one with a stethescope to detect internal arching. Link to comment Share on other sites More sharing options...
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