rockfangd Posted March 5, 2012 Report Share Posted March 5, 2012 Excellent. Did you ge one from the dealer? I could not get one. they said the only thing being sold as the whole intake. I laso had a number for the valve but couldnt find one. I also agree, I would never seal it up. It is there for a reason and sealing it up can be bad for more than just the intake if something happens. When I replaced the intake on my 97 it was a huge improvement GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 5, 2012 Report Share Posted March 5, 2012 I just changed it. Took the power steering pump off. But now car won't start. I unhooked the negative like manual said but when I put it back on I keep hearing pops on other side of car now when I try to start it just clicks once. Please post where you obtained the valve for the benefit of members having this issue in the future, thanks 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...
waymon Posted March 6, 2012 Author Report Share Posted March 6, 2012 I went to my local junk yard and grabbed a few from different motors. Link to comment Share on other sites More sharing options...
waymon Posted March 6, 2012 Author Report Share Posted March 6, 2012 Ok update time. After installing another flap I didn't get a code until I got to work again. But it's only for p0174. Gonna hope its just another leak. Gonna search in morning when I get off. Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 6, 2012 Report Share Posted March 6, 2012 That is bank 2, look for a vacuum leak that affects only that bank 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...
rockfangd Posted March 6, 2012 Report Share Posted March 6, 2012 how i the elbow on the pcv valve tube? if it shows any signs of cracking it should be replaced. pcv valve is passenger side rear on cam cover GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
scott y Posted March 9, 2012 Report Share Posted March 9, 2012 Maybe a bad coil, ICM or fuel pump? Pull the DTC's. Post them AND their definitions and check your fuel pressure. What should that pressure be? Link to comment Share on other sites More sharing options...
Ranger Posted March 10, 2012 Report Share Posted March 10, 2012 45 psi give or take. Link to comment Share on other sites More sharing options...
waymon Posted March 13, 2012 Author Report Share Posted March 13, 2012 ok so its been a few days now. the car still sputters to live more times than not. it is still throwing the p0174 fuel system lean bank 2 code at random. comes and goes very speratic. i have run 2 tanks of gas through it and no improvement. at the time of last post i went out and did lots of work to it. cleaned the throttle body, fpr, and pcv. changed the fuel filter. used a whole can of carb cleaner and couldnt find any vacum leaks. still only getting 18.8 mpg. its frusterating because at times it will fire up like a darn beast but thats only been a handfull of times. usuallyu takes between 6 and 10 turns of the starter and then it shakes to live. i have yet to check fuel pressure. i have to do that soon. any ways thats the update so drop some sugestions. hey rockfangd, did u ever look at your intake. just changing the acual flap worked great. i hope that helps more people. you might have to get a few from junk yard to find good one but well worth it compared to a new intake. Link to comment Share on other sites More sharing options...
rockfangd Posted March 14, 2012 Report Share Posted March 14, 2012 My schedule is so hectic I honestly havent even looked at it. I saved it because Being I have 2 cadillacs same era if I needed a part I could swap it right in. I have to pull the flap GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 14, 2012 Report Share Posted March 14, 2012 I think the next move would be to check fuel pressure, gently torque down the manifold to spec and make sure the fuel rail is seated on that bank 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...
waymon Posted March 15, 2012 Author Report Share Posted March 15, 2012 And by gently I take it we have had problems with the plastic breaking? I am going to get new battery terminals because I think mine aren't holding. I keep getting the code for unhooked battery and my radio keeps resetting. When I press the brakes my headlights dim at night. Pretty sure that doesnt help matters much. I'm going to a drift event this weekend. A couple of buds r running their cars. Pretty sure I can conger up a fuel pressure gauge. Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 15, 2012 Report Share Posted March 15, 2012 No, by over torquing the bolts, you can damage the seals. Its important in my opinion to use an inch pound torque wrench Simply calling the intake plastic is to devalue it and that thought needs correcting. The intake manifold is Nylon 66 thermoplastic, which its engineers explain that this helps cool intake air by conducting less heat from the engine Here is an article on Nylon 66 thermoplastic http://www.ferret.com.au/c/Allplastics-Engineering/Allplastics-Engineering-introduce-nylon-66-thermoplastic-products-n866366 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...
waymon Posted March 16, 2012 Author Report Share Posted March 16, 2012 ok so i struck a nerve. lets put it this way. nylon is a type of polymer. most polymers are refered to as plastics because that is a sub catagory. most people dont know what polymer is so i chose to say plastic, and when you say nylon most people think of rope. now as i work with medical grade implant polymer rated by the fda to last 30 years, wich is the longest rated "plastic" as far as implants go. i was not trying to devalue just dumbing the facts down for understandabilty. Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 16, 2012 Report Share Posted March 16, 2012 What was the result of the fuel pressure test? 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...
waymon Posted March 21, 2012 Author Report Share Posted March 21, 2012 Ok so I can't rent a fuel pressure gauge. Every time I go to parts store they don't have it. But I have new codes. P0139 slow response bank 1 sensor 2 P0174 fuel system lean bank 2 "repeater" P0300 random misfire "don't get this one at all" I have checked the fuel rail and retightened the intake. Still can not find vacum leak. Bank 1 sensor 2 is the one right in front of the cat correct? Random misfire is a mystery also. I have new plugs and wires, but this last time I did run the tank down as low as possible before filling up so I could ensure that at all possible bad gas would get used. I am only on my 4th tank of gas. Is there something I should do to address this issue or toss it up to bad gass at bottom of tank, possibly watered down a bit from setting up before I bought it? Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 21, 2012 Report Share Posted March 21, 2012 Ok the LEAN code (P0174) is causing your misfire code (P0300) Have you checked the intake manifold bolt torque? I know you have looked at the PCV valve for proper seating, the brake booster, looked for cracks, etc. If the bolts are at spec torque or at least snugged up, I would consider removing the intake and checking the seals. That said, the O2 Sensor must be fixed, Bank 1, Sensor 2 is the pre-cat sensor, I have changed it. Use the correct socket, warm up the muffler system for about a minute, and use a breaker bar, if I recall, the sensor wire is retained so that it stays away from the pipe Here is the O2 Sensor Location Key: Bank 1 Sensor 1 - right bank (rear) manifold Bank 1 Sensor 2 - pre-cat Bank 1 Sensor 3 - aft-cat Bank 2 Sensor 1 - left bank (front) manifold 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...
waymon Posted April 5, 2012 Author Report Share Posted April 5, 2012 i have ran the car all week without the code poping up. i got under the car and cleaned the conector to the sensor and have not seen any more emmission codes. thanks to every one for the help. now i get to start a new thread for a steering problem. yay Link to comment Share on other sites More sharing options...
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