adallak Posted August 23, 2011 Report Share Posted August 23, 2011 Today, after a 20 mile trip, when I got out of car I have noticed unusual heat wave coming from the driver side of the car. I touched all the rims, thinking the brakes could be dragging - nothing. There was no heat wave on the passenger side. Later I realized that it could be driver side cat converter... I have recently replaced driver side AC Delco plugs with Iridium NGK and the original wires with AC Delco. I did notice the resistance of the new wire set was much higher that the old one... Now, because I did only the driver side, I am curious if that replacement could cause rich condition and too hot cat converter... I do not feel any power loss. The car has dual exhaust and two cat converters. I hate tune-ups! The car was fine, what the hell I decided to replace the plugs and wires! I have planned a 500 mile road trip. Is it safe to drive like that? The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 23, 2011 Report Share Posted August 23, 2011 I would look at the cat in the dark when it is hot to see if it glows, maybe a leaky injector? I would think that if the new plugs were not firing correctly you would feel it Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
KHE Posted August 23, 2011 Report Share Posted August 23, 2011 It could be the plugs - who knows if the heat range of the NGK is equivalent to the AC-Delcos that were in there originally. Catalytic converters get hot as part of their operation - it could be possible the wind was blowing in a direction you only noticed the heat from the driver's side? If you have access to an infared thermometer, take the car on a similar drive and test the temperature of each converter. If there is something wrong, you'd notice a large temperature difference. If you do notice a large temp. difference, try reinstalling the AC Delco's on the side that is giving the issue and see what the cat. temps are. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 23, 2011 Report Share Posted August 23, 2011 I would look at the cat in the dark when it is hot to see if it glows, maybe a leaky injector? I would think that if the new plugs were not firing correctly you would feel it Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
adallak Posted August 23, 2011 Author Report Share Posted August 23, 2011 It could be the plugs - who knows if the heat range of the NGK is equivalent to the AC-Delcos that were in there originally. Catalytic converters get hot as part of their operation - it could be possible the wind was blowing in a direction you only noticed the heat from the driver's side? If you have access to an infared thermometer, take the car on a similar drive and test the temperature of each converter. If there is something wrong, you'd notice a large temperature difference. If you do notice a large temp. difference, try reinstalling the AC Delco's on the side that is giving the issue and see what the cat. temps are. KHE, I felt that heat wave twice in different locations. Definitely not a wind... I cannot see if it glows because it i snot dark enough. No IR thermometer at the moment. I have to live for NY and NJ in about two hours.... If it were ignition related, I would probably notice a difference. I am very sensitive to anything happening to the car. Funny, I have done lots of unnecessary repairs on my 91 Seville and it was fine. Whatever preventive repair I do on the Fleetwood, it only gets worse! LOL The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
adallak Posted August 23, 2011 Author Report Share Posted August 23, 2011 I would look at the cat in the dark when it is hot to see if it glows, maybe a leaky injector? I would think that if the new plugs were not firing correctly you would feel it I'll do just that, Mike. Later tonight and will report the results. I agree, I would notice misfire.I am curious if that extra resistance in new AC DElco wires put additional load on the coil and ICM... Looks like AC Delco switched to a cheaper vendor or something despite the price is still as high as before. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
joeb Posted August 23, 2011 Report Share Posted August 23, 2011 Does car have stock cats in stock locations? I am not up on lt1 cars. Link to comment Share on other sites More sharing options...
adallak Posted August 24, 2011 Author Report Share Posted August 24, 2011 Does car have stock cats in stock locations? I am not up on lt1 cars. Everything is stock. I think I have overreacted. i made a 200 mile trip with no problem. The driver side cat is easily accessible from under the hood. It did not look unusually hot. So, KHE was probably right , some light breez created a heat wave I associated with a hot cat by mistake. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 24, 2011 Report Share Posted August 24, 2011 Glad to hear it, its good you are paying attention to the car's operation like I do (and my parents were good at it too), but sometimes you create problems, like I do with my heart. Sometimes, I begin to feel my heart beat, sort of a palpitation, and I begin to pay attention to it, and it becomes a problem and chronic. I schedule an appointment with a cardiologist and he usually gives me a stress test and EKG, that usually costs a lot of money. During my last stress test, i was sweating profusely, in a full run, my heart was running 180 beats a minute and I said, there I felt it..... the Doctor was like, HUH?. He stops the tape runs it back and says, were you an athelete?, I said, yes, how did you know?, he said, sir, you just felt ONE aberrant beat out of 180 in full stride uphill on a treadmill! He looked at the nurse and they both began laughing, he said, your heart is perfect, stop worrying about it, he said you should see what a bad heart looks like, they go into arrest just walking fast! All of a sudden my heart palpitations are magically CURED! This has happened the same way about 3 times over the last 30 years! And it only costs $1000 in co-payments to find out that I am ok..... And the moral of the story is, stay alert for your vehicle operation, but not overly alert! Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
adallak Posted August 24, 2011 Author Report Share Posted August 24, 2011 Glad to hear it, its good you are paying attention to the car's operation like I do (and my parents were good at it too), but sometimes you create problems, like I do with my heart. Sometimes, I begin to feel my heart beat, sort of a palpitation, and I begin to pay attention to it, and it becomes a problem and chronic. I schedule an appointment with a cardiologist and he usually gives me a stress test and EKG, that usually costs a lot of money. During my last stress test, i was sweating profusely, in a full run, my heart was running 180 beats a minute and I said, there I felt it..... the Doctor was like, HUH?. He stops the tape runs it back and says, were you an athelete?, I said, yes, how did you know?, he said, sir, you just felt ONE aberrant beat out of 180 in full stride uphill on a treadmill! He looked at the nurse and they both began laughing, he said, your heart is perfect, stop worrying about it, he said you should see what a bad heart looks like, they go into arrest just walking fast! All of a sudden my heart palpitations are magically CURED! This has happened the same way about 3 times over the last 30 years! And it only costs $1000 in co-payments to find out that I am ok..... And the moral of the story is, stay alert for your vehicle operation, but not overly alert! Golden words, Mike! Sometimes I believe I am more concerned with my car's performance than my own health. Glad your heart passed all the tests with flying colors! LOL The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 24, 2011 Report Share Posted August 24, 2011 Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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