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Cadillac Forum - Enthusiast forums for Cadillac Owners (https://www.cadillacforum.com/forum/)
-   Cadillac Deville (https://www.cadillacforum.com/forum/cadillac-deville-15/)
-   -   Bad Gas Milegae (https://www.cadillacforum.com/forum/cadillac-deville-15/bad-gas-milegae-7532/)

slowroll 12-05-2008 09:30 PM
RE: Bad Gas Milegae
 
95 deville should be a 4.9l not a northstar, wot does not apply. "blowing out the carbon" wont hurt but don't over rev engine, keep it under 4500 rpm.

Tarrance 12-05-2008 09:47 PM
RE: Bad Gas Milegae
 
ORIGINAL: slowroll

95 deville should be a 4.9l not a northstar, wot does not apply. "blowing out the carbon" wont hurt but don't over rev engine, keep it under 4500 rpm.
I dont know which one he has, but the northstar was an option on the 95. Became standardin 96. However, a '95 be it 4.9 or Northstar, both take 93 octane. That's why I asked what year the car was.

musique 12-05-2008 11:14 PM
RE: Bad Gas Milegae
 
Northstar or not, an engine is made to work, and driving it at near idle speeds is not good for the longevity of the motor. Some of the longest lasting motors are ones that have been driven hard. I'm not suggesting abusing it, but if you want an engine to perform well, you have to allow it to do so. It helps reduce carbon buildup, and also allows all the components to work at their optimum, which is what an engine likes to do. It can keep you from getting clogged/dirty fuel injectors and all kinds of unwanted problems.

santanerox3 12-08-2008 07:54 PM
RE: Bad Gas Milegae
 
ORIGINAL: musique

Northstar or not, an engine is made to work, and driving it at near idle speeds is not good for the longevity of the motor. Some of the longest lasting motors are ones that have been driven hard. I'm not suggesting abusing it, but if you want an engine to perform well, you have to allow it to do so. It helps reduce carbon buildup, and also allows all the components to work at their optimum, which is what an engine likes to do. It can keep you from getting clogged/dirty fuel injectors and all kinds of unwanted problems.
mine's not a northstar its just 4.9. the only time i step on the accelerator is if im in a hurry which is mostly in the mornings on my way to work. i clean my throttle body once in a while and i used to put those injector cleaners that u put in ur gas tank. imma try to get a full fuel and intake cleaning.

slowroll 12-08-2008 08:55 PM
RE: Bad Gas Milegae
 
Have you check base timing? Do you know how to use the on-board diagnostics built in to car. There's more to it than just being able to get and clear codes.Are codes stored? Have you checked cat. conv. for being restricted? You stated TPS was replaced, how did you adjust / what is it set at?

santanerox3 12-14-2008 08:03 PM
RE: Bad Gas Milegae
 
ORIGINAL: slowroll

Have you check base timing? Do you know how to use the on-board diagnostics built in to car. There's more to it than just being able to get and clear codes.Are codes stored? Have you checked cat. conv. for being restricted? You stated TPS was replaced, how did you adjust / what is it set at?
yea i know how to get to the obd but idk which one it would be to check the base timing. i had my cat. cut off cuz i didnt have money at that time so im running str8 pipe where the cat. should be. i didnt adjust the tps idk how if u do can u let me know and if u have a pic that would be even better thankz alot. i had some codes and they were all from the bad tps.


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